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|Trouble Code: P1870 (4.3L V6 VIN X N/R) |Print this code data[pic] |

|Transmission Component Slipping (4L60-E, 4L65-E, 4L80-E) | |

Number of Trips to Set Code:   1

OBD II Monitor Type:  CCM Details

Indicators:  MIL Details

• CCM Details

• MIL Details

Trouble Code Conditions:

DTC P0122, P0123, P0502, P0503, P0711-P0713, P0740, P0753, P0758, P1810 and P1860 not set, vehicle driven at a speed of 30-70 mph at an engine speed of 1500-3000 rpm, Fuel Cutoff inactive, TP angle from 9-35%, engine vacuum 0-150 kPa, speed ratio is 0.69-0.88, Transmission not 1st gear, gear range is D4, TFT sensor from 68ºF-266ºF, shift solenoid diagnostic counter at zero, then with the TCC solenoid commanded "on" at a 95% duty cycle for 5 seconds, the PCM detected the TCC slip speed was 130-180 rpm for 7 seconds. The fault must be detected three times with the TCC commanded "off" each time between cycles.

Possible Causes: 

• 1-2 shift solenoid valve has sediment, damage or leaking seals

• 2-3 shift solenoid valve has sediment, damage or leaking seals

• 3-2 shift solenoid valve has sediment, damage or leaking seals

• Valve body regulator apply valve stuck or regulator is scored

• Torque converter front stator shaft bushing is worn, the stator roller clutch is not holding or it has external damage/leaks

• Converter clutch valve is stuck or it is installed backwards

• Converter clutch valve retaining ring is not positioned properly

• Converter clutch outer valve spring is cocked

• Pump to case gasket is not positioned properly

• Orifice cup plugs are restricted or damaged

• Over-tightened, or unevenly tightened pump body to cover bolts

• TSB 02-07-30-001 contains a repair procedure for this code

1999 Chevrolet S10 - Powertrain - Automatic Transmission - 4L60-E - DTC P1870 Transmission Component Slipping (4.3L)

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[pic][pic]PATH:  Diagnostics > Diagnostic Routines > Powertrain > Automatic Transmission - 4L60-E > DTC P1870 Transmission Component Slipping (4.3L)

DTC P1870 Transmission Component Slipping (4.3L)

|NOTE |

|Applicable vehicles: |

|Blazer, Bravada, Envoy, Jimmy, S10 Pickup, Sonoma (VIN S/T) |

DTC P1870 Transmission Component Slipping (4.3L)

|Table 1: |DTC P1870 Range Reference Thumbnail 4L60-E |

|Table 2: |DTC P1870 Transmission Component Slipping (4.3L) |

|[pic] |

| |

|Click to Enlarge |

DTC P1870 Range Reference Thumbnail 4L60-E

|Range |Gear |Shift |TCC |TCC PWM Solenoid |

| | |Solenoid |Solenoid | |

|1 |Was the Powertrain On-Board Diagnostic (OBD) System Check performed? |-- |Go to Step |Go to Powertrain On |

| | | |2 |Board Diagnostic |

| | | | |(OBD) System Check |

| | | | |in Engine Controls |

|2 |Perform the transmission fluid checking procedure. |-- |Go to Step |Go to Transmission |

| |Refer to Transmission Fluid Check . | |3 |Fluid Check |

| |Did you perform the transmission fluid checking procedure? | | | |

|3 |Install the Scan Tool . |130-800 RPM |Go to Step |Go to Diagnostic |

| |With the engine OFF, turn the ignition switch to the RUN position. | |4 |Aids |

| |WARNING | | | |

| | | | | |

| |Important: Before clearing the DTC, use the scan tool in order to record | | | |

| |the Freeze Frame and Failure Records. Using the Clear Info function erases| | | |

| |the Freeze Frame and Failure Records from the VCM. | | | |

| | | | | |

| |Record the DTC Freeze Frame and Failure Records. | | | |

| |Clear the DTC. | | | |

| |Drive the vehicle in 4th gear with the TCC commanded ON. | | | |

| |Is the scan tool TCC Slip Speed within the specified range for 7 seconds? | | | |

|4 |Inspect the torque converter clutch (TCC) solenoid valve for the following|-- |Go to Step |Go to Step 5 |

| |conditions: | |13 | |

| |Internal malfunction (such as sediment or damage) | | | |

| |Damaged seals | | | |

| |Inspect the torque converter clutch pulse width modulation (TCC PWM) | | | |

| |solenoid valve for the following conditions: | | | |

| |Internal malfunction (such as sediment or damage) | | | |

| |Damaged seals | | | |

| |Did you find a condition? | | | |

|5 |Inspect the 1-2 shift solenoid (SS) valve for the following conditions: |-- |Go to Step |Go to Step 6 |

| |Internal malfunction (such as sediment or damage) | |13 | |

| |Damaged seals | | | |

| |Refer to Shift Solenoid Leak Test . | | | |

| |Inspect the 2-3 shift solenoid (SS) valve for the following conditions: | | | |

| |Internal malfunction (such as sediment or damage) | | | |

| |Damaged seals | | | |

| |Refer to Shift Solenoid Leak Test . | | | |

| |Did you find a condition? | | | |

|6 |Inspect the valve body assembly for a stuck regulator apply valve. |-- |Go to Step |Go to Step 7 |

| |Refer to Unit Repair. | |13 | |

| |Did you find a condition? | | | |

|7 |Inspect the torque converter assembly for the following conditions: |-- |Go to Step |Go to Step 8 |

| |Stator roller clutch not holding | |13 | |

| |Internal damage | | | |

| |Did you find a condition? | | | |

|8 |Inspect the oil pump assembly for the following conditions: |-- |Go to Step |Go to Step 9 |

| |A stuck converter clutch valve | |13 | |

| |The converter clutch valve is assembled backwards | | | |

| |A mispositioned converter clutch valve retaining ring | | | |

| |A mispositioned pump to case gasket | | | |

| |Restricted orifice cup plugs | | | |

| |Damaged orifice cup plugs | | | |

| |Over-tightened, or unevenly tightened pump body to cover bolts | | | |

| |Refer to Unit Repair. | | | |

| |Did you find a condition? | | | |

|9 |Inspect the input housing and shaft assembly for the following conditions:|-- |Go to Step |Go to Step 10 |

| | | |13 | |

| |Cut turbine shaft O-ring seal | | | |

| |Damaged turbine shaft O-ring seal | | | |

| |Restricted turbine shaft retainer and ball assembly | | | |

| |Damaged turbine shaft retainer and ball assembly | | | |

| |Refer to Unit Repair. | | | |

| |Did you find a condition? | | | |

|10 |Inspect the 2-4 band assembly for the following conditions: |-- |Go to Step |Go to Step 11 |

| |Worn 2-4 band | |13 | |

| |Damaged 2-4 band | | | |

| |Mispositioned 2-4 band | | | |

| |Misassembled 2-4 band | | | |

| |The band anchor pin is not engaged. | | | |

| |Restricted apply passages in the 2-4 servo assembly | | | |

| |Blocked apply passages in the 2-4 servo assembly | | | |

| |Nicks or burrs on the servo pin | | | |

| |Nicks or burrs on the pin bore in the case | | | |

| |Damaged fourth servo piston | | | |

| |Misassembled fourth servo piston | | | |

| |Damaged band apply pin | | | |

| |Incorrect band apply pin | | | |

| |Damaged servo bore in the case | | | |

| |Missing piston seals | | | |

| |Cut piston seals | | | |

| |Damaged piston seals | | | |

| |Porosity in the pistons | | | |

| |Porosity in the cover | | | |

| |Porosity in the case | | | |

| |Damaged piston seal grooves | | | |

| |Plugged orifice cup plug | | | |

| |Missing orifice cup plug | | | |

| |Refer to Unit Repair. | | | |

| |Did you find a condition? | | | |

|11 |Inspect the forward clutch assembly for the following conditions: |-- |Go to Step |Go to Step 12 |

| |Worn clutch plates | |13 | |

| |Porosity in the forward clutch piston | | | |

| |Damaged forward clutch piston | | | |

| |Missing forward clutch piston inner and outer seals | | | |

| |Cut forward clutch piston inner and outer seals | | | |

| |Damaged forward clutch piston inner and outer seals | | | |

| |Missing input housing to forward clutch housing O-ring seal | | | |

| |Cut input housing to forward clutch housing O-ring seal | | | |

| |Damaged input housing to forward clutch housing O-ring seal | | | |

| |Damaged forward clutch housing | | | |

| |Damaged forward clutch housing retainer and ball assembly | | | |

| |Forward clutch housing retainer and ball assembly is not sealing. | | | |

| |Refer to Unit Repair. | | | |

| |Did you find a condition? | | | |

|12 |Inspect the 3-4 clutch assembly for the following conditions: |-- |Go to Step |Go to Diagnostic |

| |Worn clutch plates | |13 |Aids |

| |Porosity in the 3-4 clutch piston | | | |

| |Damaged 3-4 clutch piston | | | |

| |Missing 3-4 clutch inner and outer seals | | | |

| |Cut 3-4 clutch inner and outer seals | | | |

| |Damaged 3-4 clutch inner and outer seals | | | |

| |Damaged 3-4 clutch spring assembly | | | |

| |Damaged 3-4 clutch apply ring | | | |

| |Damaged piston seal grooves | | | |

| |Plugged orifice cup plug | | | |

| |Missing orifice cup plug | | | |

| |Refer to Unit Repair. | | | |

| |Did you find a condition? | | | |

|13 |Perform the following procedure in order to verify the repair: |-- |System OK |Go to Step 1 |

| |Select DTC. | | | |

| |Select Clear Info. | | | |

| |Operate the vehicle under the following conditions: | | | |

| |Drive the vehicle in D4, with the TCC ON, and a throttle position of | | | |

| |9-35%. | | | |

| |Ensure that the scan tool TCC Slip Speed is -20 to +50 RPM for at least 7 | | | |

| |seconds. | | | |

| |Select Specific DTC. | | | |

| |Enter DTC P1870. | | | |

| |Has the test run and passed? | | | |

|Trouble Code: P0338 (4.3L V6 VIN X N/R) |Print this code data[pic] |

|Crankshaft Position (CKP) Sensor Circuit High | |

|Duty Cycle | |

Number of Trips to Set Code:   1

OBD II Monitor Type:  CCM Details

Indicators:  MIL Details

• CCM Details

• MIL Details

Trouble Code Conditions:

• The engine speed is less than 4,000 RPM

• The MAF is 5 g/s or greater

Possible Causes: 

• A chipped or damaged reluctor wheel

• Incorrect reluctor wheel

• Incorrect alignment of the CKP sensor to reluctor wheel

• Excessive crankshaft end play

• A poor connection

• Rubbed through wire insulation

• A broken wire inside the insulation

1999 Chevrolet S10 - Powertrain - Engine Controls - 4.3L - DTC P0338 Crankshaft Position (CKP) Sensor Circuit High Duty Cycle

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[pic][pic]PATH:  Diagnostics > Diagnostic Routines > Powertrain > Engine Controls - 4.3L > DTC P0338 Crankshaft Position (CKP) Sensor Circuit High Duty Cycle

DTC P0338 Crankshaft Position (CKP) Sensor Circuit High Duty Cycle

|NOTE |

|Applicable vehicles: |

|Blazer, Bravada, Envoy, Jimmy, S10 Pickup, Sonoma (VIN S/T) |

DTC P0338 Crankshaft Position (CKP) Sensor Circuit High Duty Cycle

|[pic] |

| |

|Click to Enlarge |

Circuit Description

The crankshaft position (CKP) sensor is a sensor designed to detect changes in a magnetic field. The control module supplies the CKP sensor a signal and ground circuits. Ignition voltage is supplied to the sensor by an independent circuit. The CKP sensor produces a magnetic field whenever the ignition is ON. The CKP sensor is mounted near a reluctor wheel that is attached to the crankshaft. When the crankshaft rotates, when the engine is cranking or running, the toothed reluctor wheel changes the magnetic field. The CKP sensor converts each change in the magnetic field into a PULSE. The number of teeth on the reluctor wheel determines how many pulses the CKP sensor detects per crankshaft rotation. The CKP sensor signal is used in order to determine the engine speed, the crankshaft position, and to detect misfire.

If the CKP frequency is greater than expected by the VCM, this DTC will be set.

Conditions for Running the DTC

• The engine speed is less than 4,000 RPM

• The MAF is 5 g/s or greater

Conditions for Setting the DTC

The CKP sensor duty cycle is greater than a calibrated value.

Action Taken When the DTC Sets

• The control module stores the DTC in history after the first failure but will not illuminate the malfunction indicator lamp (MIL).

• The control module records the operating conditions at the time the diagnostic fails. The control module stores the failure information in the scan tools Freeze Frame/Failure Records.

Conditions for Clearing the MIL/DTC

• A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles.

• A warm-up cycle occurs when the coolant temperature has risen 22°C (40°F) from the startup coolant temperature and the engine coolant temperature exceeds 70°C (160°F) during the same ignition cycle.

• Use the scan tool Clear Information function.

Diagnostic Aids

Inspect the face of the CKP sensor for metal shavings. This could result in an intermittent DTC P0339.

Also check for the following conditions:

• A chipped or damaged reluctor wheel

• Incorrect reluctor wheel

• Incorrect alignment of the CKP sensor to reluctor wheel

• Excessive crankshaft end play

Refer to Symptoms

Check for Electro-magnetic Interference.

An intermittent may be caused by any of the following conditions:

• A poor connection

• Rubbed through wire insulation

• A broken wire inside the insulation

Thoroughly check any circuitry that is suspected of causing the intermittent complaint. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.

If a repair is necessary, refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

2. It is very difficult to start an engine with a crank sensor high duty cycle failure. A running engine, however, may not be adversely affected by a high duty cycle failure.

3. This step determines if DTC P0338 is the result of a hard failure or an intermittent condition.

4. This test checks the crank sensor for too high of a duty cycle.

|Step |Action |Value(s) |Yes |No |

|1 |WARNING |-- |Go to Step 2 |Go to Powertrain |

| | | | |On Board |

| |Important: Before clearing the DTCs, use the scan tool in order to | | |Diagnostic (OBD) |

| |record the Freeze Frame and the Failure records for reference. The | | |System Check |

| |control module's data is deleted once the Clear Info function is used. | | | |

| | | | | |

| |Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | | | |

|2 |Does the engine start? |-- |Go to Step 4 |Go to Step 3 |

|3 |Clear the DTCs. |-- |Go to Step 4 |Go to Engine |

| |Crank the engine for 10 seconds. | | |Cranks but Does |

| |Does DTC P0338 set? | | |Not Run |

|4 |Turn OFF the ignition. |60 % |Go to Step 5 |Go to Step 8 |

| |Disconnect the CKP sensor harness connector. | | | |

| |Install the gray jumpers from the connector test adapter kit J 35616 | | | |

| |between the engine harness connector and the CKP sensor. | | | |

| |WARNING | | | |

| | | | | |

| |Important: The red (positive) lead from the DMM must be connected to the| | | |

| |CKP (3X) signal circuit. | | | |

| | | | | |

| |Install a J 39200 DMM set to the duty cycle position (select the AC | | | |

| |scale and press the Hz button twice in order to display the % duty | | | |

| |cycle) between the CKP sensor (3x) signal circuit and the CKP sensor | | | |

| |ground circuit. | | | |

| |Crank the engine. | | | |

| |Is the duty cycle more than the specified value? | | | |

|5 |Check the crankshaft position (CKP) sensor and the reluctor wheel for |-- |Go to Step 6 |Go to Step 7 |

| |damage. Refer to Diagnostic Aids. | | | |

| |Did you find a problem? | | | |

|6 |Replace the crankshaft position (CKP) sensor and/or the crankshaft |-- |Go to Step 10 |-- |

| |reluctor wheel, refer to Crankshaft Position Sensor Replacement and/or | | | |

| |Crankshaft Position Sensor Reluctor Ring Replacement in Engine | | | |

| |Mechanical. | | | |

| |Perform the CKP Variation Learn Procedure. Refer to Crankshaft Position | | | |

| |System Variation Learn . | | | |

| |Is the action complete? | | | |

|7 |WARNING |-- |Go to Step 10 |-- |

| | | | | |

| |Important: Inspect the CKP sensor mounting surface in order to insure | | | |

| |that the surface is clean and free of debris. | | | |

| | | | | |

| |Replace the CKP sensor. Refer to Crankshaft Position Sensor Replacement | | | |

| |. | | | |

| |Perform the CKP System Variation Learn Procedure. Refer to Crankshaft | | | |

| |Position System Variation Learn . | | | |

| |Is the action complete? | | | |

|8 |Using the scan tool, clear the DTCs. |-- |Go to Step 11 |Go to Step 9 |

| |Start the engine. | | | |

| |Allow the engine to idle until the engine reaches normal operating | | | |

| |temperature. | | | |

| |Select DTC and the Specific DTC function. | | | |

| |Enter the DTC number which was set. | | | |

| |Operate the vehicle, with the Conditions for Setting this DTC, until the| | | |

| |scan tool indicates the diagnostic Ran. | | | |

| |Does the scan tool indicate the diagnostic Passed? | | | |

|9 |Replace the VCM. |-- |Go to Step 10 |-- |

| |Program the new VCM. Refer to VCM Replacement/Programming . | | | |

| |Perform the Passlock Reprogramming Procedure. Refer to PASSLOCK | | | |

| |Reprogramming Seed and Key in Theft Deterrent. | | | |

| |Perform the CKP System Variation Learning Procedure. Refer to Crankshaft| | | |

| |Position System Variation Learn . | | | |

| |Is the action complete? | | | |

|10 |Using the scan tool, clear the DTCs. |-- |Go to Step 11 |Go to Step 2 |

| |Start the engine. | | | |

| |Allow the engine to idle until the engine reaches normal operating | | | |

| |temperature. | | | |

| |Select DTC and the Specific DTC functions. | | | |

| |Enter the DTC number which was set. | | | |

| |Operate the vehicle, with the Condition for Setting this DTC, until the | | | |

| |scan tool indicates the diagnostic Ran. | | | |

| |Does the scan tool indicate the diagnostic Passed? | | | |

|11 |Does the scan tool display any additional undiagnosed DTCs? |-- |Go to the |System OK |

| | | |applicable DTC | |

| | | |table | |

|Trouble Code: P0339 (4.3L V6 VIN X N/R) |Print this code data[pic] |

|CMP Sensor Circuit Malfunction | |

Number of Trips to Set Code:   1

OBD II Monitor Type:  CCM Details

Indicators:  MIL Details

• CCM Details

• MIL Details

Trouble Code Conditions:

Engine started; and the PCM did not detect any CMP sensor (Hall Effect) pulses at least once during 2 complete crankshaft revolutions during the CCM test.

Possible Causes: 

• CMP sensor signal circuit is open or shorted to ground

• CMP sensor VREF circuit is open between sensor and PCM

• CMP sensor ground (Low Reference) circuit is open

• CMP sensor is damaged or it failed (check the reluctor wheel)

• PCM has failed

• TSB 02-06-04-043 contains a repair procedure for this code

1999 Chevrolet S10 - Powertrain - Engine Controls - 4.3L - DTC P0339 Crankshaft Position (CKP) Sensor Circuit Intermittent

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[pic][pic]PATH:  Diagnostics > Diagnostic Routines > Powertrain > Engine Controls - 4.3L > DTC P0339 Crankshaft Position (CKP) Sensor Circuit Intermittent

DTC P0339 Crankshaft Position (CKP) Sensor Circuit Intermittent

|NOTE |

|Applicable vehicles: |

|Blazer, Bravada, Envoy, Jimmy, S10 Pickup, Sonoma (VIN S/T) |

DTC P0339 Crankshaft Position (CKP) Sensor Circuit Intermittent

|[pic] |

| |

|Click to Enlarge |

Circuit Description

The crankshaft position (CKP) sensor is a sensor designed to detect changes in a magnetic field. The control module supplies the CKP sensor a signal and ground circuits. Ignition voltage is supplied to the sensor by an independent circuit. The CKP sensor produces a magnetic field whenever the ignition is ON. The CKP sensor is mounted near a reluctor wheel that is attached to the crankshaft. When the crankshaft rotates, when the engine is cranking or running, the toothed reluctor wheel changes the magnetic field. The CKP sensor converts each change in the magnetic field into a PULSE. The number of teeth on the reluctor wheel determines how many pulses the CKP sensor detects per crankshaft rotation. The CKP sensor signal is used in order to determine the engine speed, the crankshaft position, and to detect misfire.

If a loss of the CKP signal or an erratic signal is detected by the VCM while the engine is running, this DTC will be set.

Conditions for Running the DTC

The MAF is 5 g/s or more.

Conditions for Setting the DTC

• The measured change in engine speed is more than 1,000 RPM during a 125 ms time period, or

• The measured engine speed is 0 RPM and 4 or more camshaft position sensor pulses have occurred over a period of 2 to 3 seconds

Action Taken When the DTC Sets

• The control module illuminates the malfunction indicator lamp (MIL) if a failure is detected during 2 consecutive key cycles.

• The control module sets the DTC and records the operating conditions at the time the diagnostic failed. The failure information is stored in the scan tool Freeze Frame/Failure Records.

Conditions for Clearing the MIL or DTC

• The control module turns OFF the MIL after 3 consecutive drive trips when the test has run and passed.

• A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles. A warm-up cycle occurs when the coolant temperature has risen 22°C (40°F) from the startup coolant temperature and the engine coolant reaches a temperature that is more than 70°C (158°F) during the same ignition cycle.

• Use a scan tool in order to clear the DTCs.

Diagnostic Aids

Inspect the face of the CKP sensor for metallic particles. This could result in an intermittent DTC.

Check for the following:

• A chipped or damaged reluctor wheel

• An incorrect reluctor wheel

• The incorrect alignment of the CKP sensor to the reluctor wheel

• Excessive crankshaft end play

• Refer to Symptoms .

An intermittent may be caused by any of the following conditions:

• A poor connection

• Rubbed through wire insulation

• A broken wire inside the insulation

Thoroughly check any circuitry that is suspected of causing the intermittent complaint. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.

If a repair is necessary, refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

3. This step checks the ignition positive voltage circuit to the crankshaft position sensor.

5. This step checks the duty cycle of the crankshaft position sensor.

|Step |Action |Value(s) |Yes |No |

|1 |WARNING |-- |Go to Step 2 |Go to Powertrain On |

| | | | |Board Diagnostic (OBD)|

| |Important: Before clearing the DTCs, use the scan tool Capture | | |System Check |

| |Info to save the Freeze Frame and Failure Records for reference. | | | |

| |The control module's data is deleted once the Clear Info function | | | |

| |is used. | | | |

| | | | | |

| |Did you perform the Powertrain On-Board Diagnostic (OBD) System | | | |

| |Check? | | | |

|2 |Does the vehicle start and continue to run? |-- |Go to Diagnostic |Go to Step 3 |

| | | |Aids | |

|3 |Disconnect the crankshaft position (CKP) sensor harness connector.|-- |Go to Step 4 |Go to Step 6 |

| |Connect a test lamp to a ground. | | | |

| |Turn ON the ignition leaving the engine OFF. | | | |

| |Probe the crankshaft position sensor connector ignition positive | | | |

| |voltage circuit. | | | |

| |Is the test lamp ON? | | | |

|4 |Connect the test lamp between the CKP sensor connector ignition |-- |Go to Step 5 |Go to Step 7 |

| |positive voltage and ground terminals. | | | |

| |Is the test lamp ON? | | | |

|5 |Turn OFF the ignition. |40-60 % |Go to Step 8 |Go to Step 9 |

| |Install the gray jumpers from the J 35616 connector test adaptor | | | |

| |kit between the engine harness connector and the CKP sensor | | | |

| |ignition positive voltage and ground circuits. | | | |

| |Install a J 39200 DMM set to the duty cycle position (select AC | | | |

| |voltage and press the Hz button twice in order to display the duty| | | |

| |cycle), between the 3X CKP sensor signal circuit and the CKP | | | |

| |sensor ground circuit. | | | |

| |Crank the engine. | | | |

| |Is the duty cycle within the specified value? | | | |

|6 |Repair the open or short to ground in the CKP sensor ignition |-- |Go to Step 16 |-- |

| |positive voltage circuit. Refer to Wiring Repairs in Wiring | | | |

| |Systems. | | | |

| |Is the action complete? | | | |

|7 |Check the CKP sensor ground circuit for an open. |-- |Go to Step 14 |Go to Step 13 |

| |Did you find a problem? | | | |

|8 |Check for an open or a short in the 3X CKP sensor signal circuit. |-- |Go to Step 14 |Go to Step 11 |

| |Did you find a problem? | | | |

|9 |Check the crankshaft position (CKP) sensor and the crankshaft |-- |Go to Step 10 |Go to Step 12 |

| |reluctor wheel for damage. Refer to Diagnostic Aids. | | | |

| |Did you find a problem? | | | |

|10 |Replace the crankshaft position (CKP) sensor and/or the crankshaft|-- |Go to Step 16 |-- |

| |reluctor wheel, refer to Crankshaft Position Sensor Replacement | | | |

| |and/or Crankshaft Position Sensor Reluctor Ring Replacement in | | | |

| |Engine Mechanical. | | | |

| |Perform the CKP System Variation Learn Procedure. Refer to | | | |

| |Crankshaft Position System Variation Learn . | | | |

| |Is the action complete? | | | |

|11 |Check for a poor connection at the CKP sensor. |-- |Go to Step 14 |Go to Step 13 |

| |Did you find a problem? | | | |

|12 |WARNING |-- |Go to Step 16 |-- |

| | | | | |

| |Important: Inspect the CKP sensor mounting surface to insure the | | | |

| |surface is clean and free of debris. | | | |

| | | | | |

| |Replace the CKP sensor. Refer to Crankshaft Position Sensor | | | |

| |Replacement . | | | |

| |Perform the CKP System Variation Learn Procedure. Refer to | | | |

| |Crankshaft Position System Variation Learn . | | | |

| |Is the action complete? | | | |

|13 |Check for a poor connection at the VCM. |-- |Go to Step 14 |Go to Step 15 |

| |Did you find a problem? | | | |

|14 |Repair the circuit as necessary. Refer to Connector Repairs or |-- |Go to Step 16 |-- |

| |Wiring Repairs in Wiring Systems. | | | |

| |Is the action complete? | | | |

|15 |Replace the VCM. |-- |Go to Step 16 |-- |

| |Program the new VCM. Refer to VCM Replacement/Programming . | | | |

| |Perform the Passlock Reprogramming Procedure. Refer to PASSLOCK | | | |

| |Reprogramming Seed and Key in Theft Deterrent. | | | |

| |Perform the CKP System Variation Learn Procedure. Refer to | | | |

| |Crankshaft Position System Variation Learn . | | | |

| |Is the action complete? | | | |

|16 |Using the scan tool, clear the DTCs. |-- |Go to Step 17 |Go to Step 2 |

| |Start the engine. | | | |

| |Allow the engine to idle until the engine reaches normal operating| | | |

| |temperature. | | | |

| |Select the DTC and the Specific DTC functions. | | | |

| |Enter the DTC number which was set. | | | |

| |Operate the vehicle, with the Conditions for Setting this DTC, | | | |

| |until the scan tool indicates that the diagnostic Ran. | | | |

| |Does the scan tool indicate that the diagnostic Passed? | | | |

|17 |Does the scan tool display any additional undiagnosed DTCs? |-- |Go to the |System OK |

| | | |applicable DTC | |

| | | |table | |

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