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|Trouble Code: P1870 (3.8L V6 VIN K Auto) |Print this code data[pic] |
|Transaxle Component Slipping (4T60-E) | |
Number of Trips to Set Code: 2
OBD II Monitor Type: CCM Details
Indicators: MIL Details
• CCM Details
• MIL Details
Trouble Code Conditions:
DTC P0502, P0503, P0740, P0753, P0758, P0785 and P1860 not set, engine started, vehicle driven to a speed of 30-82 at an engine speed of 1000-3000 rpm, Fuel Shutoff inactive, TP angle from 8-35%, commanded gear not in 1st gear and the gear range is D4, TFT sensor from 68ºF-266ºF, engine torque from 40-450 lb ft, The speed ratio is 0.65-0.98 (speed ratio is engine speed divided by transmission output speed), shift solenoid performance diagnostic counters are zero, TCC commanded "on" with maximum apply for 5 seconds, and the PCM detected the TCC slip speed was from 130-800 rpm, fault detected 3 times with TCC commanded "off" in between cycles. The PCM monitors the difference between engine and transmission output speed. In D3 drive range with the TCC engaged, the engine speed should closely match the transmission output speed. In D4 drive range with the TCC engaged, the TCC slip speed should be from -20 to +40 rpm. If the PCM detects excessive TCC slip when the TCC should be engaged, it will set DTC P1870.
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
• 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
1996 Chevrolet Camaro - Powertrain - Automatic Transmission - 4L60-E - DTC P1870 Transmission Component Slipping (3.8L VIN K)
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[pic][pic]PATH: Diagnostics > Diagnostic Routines > Powertrain > Automatic Transmission - 4L60-E > DTC P1870 Transmission Component Slipping (3.8L VIN K)
DTC P1870 Transmission Component Slipping (3.8L VIN K)
|NOTE |
|Applicable vehicles: |
|Camaro, Firebird (VIN F) |
DTC P1870 Transmission Component Slipping (3.8L VIN K)
|Table 1: |Range Reference Chart |
|Table 2: |TFP Manual Valve Position Switch Logic |
|Table 3: |DTC P1870 Slipping Transmission Component |
|[pic] |
| |
|Click to Enlarge |
Range Reference Chart
|Range |Gear |1-2 SS Valve |2-3 SS Valve |
|Park |OFF |ON |OFF |
|Reverse |ON |ON |OFF |
|Neutral |OFF |ON |OFF |
|D4 |OFF |ON |ON |
|D3 |OFF |OFF |ON |
|D2 |OFF |OFF |OFF |
|D1 |ON |OFF |OFF |
|Illegal |ON |OFF |ON |
|Illegal |ON |ON |ON |
Test Description
The numbers below refer to the Step numbers on the diagnostic table.
2. This step compares the indicated range signal to the actual selected range. A faulty TFP Valve Position Switch could set a DTC P1870.
3. This step tests for slippage while the torque converter is in a commanded lock-up state.
DTC P1870 Slipping Transmission Component
|Step |Action |Value(s) |Yes |No |
|1 |Was the Powertrain On-Board Diagnostic (OBD) System Check performed? |-- |Go to Step 2 |Go to Powertrain |
| | | | |On Board |
| | | | |Diagnostic (OBD) |
| | | | |System Check , |
| | | | |Section 6 |
|2 |Install the scan tool. |-- |Go to Step 3 |Go to Pressure |
| |With the engine OFF, turn the ignition switch to the RUN position. | | |Switch Assembly |
| |WARNING | | |Resistance Check |
| | | | | |
| |Important:: Before clearing the DTCs, use the scan tool in order to | | | |
| |record the Freeze Frame and the Failure Records for reference. The Clear| | | |
| |Info function will erase the data. | | | |
| | | | | |
| |Record the DTC Freeze Frame and the Failure Records. | | | |
| |Apply the brake pedal. | | | |
| |Select each transmission range: Low, Dr 2, Dr 3, Overdrive, Reverse and | | | |
| |Park. | | | |
| |Refer to the TFP Val. Position Sw. Logic Table | | | |
| |Does each selected transmission range match the scan tool TFP switch | | | |
| |A/B/C display? | | | |
|3 |Drive the vehicle in 4th gear while the TCC is engaged. |175 RPM |Go to System |Go to Diagnostic |
| |At any time is the TCC Slip Speed greater than the specified value for 7| |Diagnosis |Aids |
| |seconds? | |Charts | |
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