Case Number



|Case Number |K17229170 |

|Vehicle Issue |Mil Light Is On. Sets Codes P0500, P0480 and P0243. Inspect The Ignition Switch.;Vehicle is a late |

| |built DR pick up with a Cummins Diesel engine. Sets codes p0500, p0480 and p0243. May have an ABS and |

| |Air bag warning light on. All fuses and electrical connector connections test ok. |

|System or Component |ABS Light / Anti-Lock Light,Airbag Light / SRS Light,Malfunction Indicator Light / MIL / Check Engine |

| |Light;Yes - Intermittent,Yes - Continuously,No - Condition Never Duplicated |

|Recommendation |Load test the ignition switch power feed circuit pin 14 circuit f922 with a test light. |

|Modification Date |12/14/04 10:33 AM |

.

P0243-WASTEGATE PRESSURE CONTROL PWM

| |

For a complete wiring diagram, refer to wiring information.

• When Monitored:

When the ignition is on.

• Set Condition:

The Engine Control Module (ECM) detects an open or short circuit in the Wastegate Solenoid circuit.

|Possible Causes |

|(A212) FUSED IGNITION SWITCH OUTPUT OPEN |

|(K139) WASTEGATE SOLENOID CONTROL CIRCUIT OPEN |

|(K139) WASTEGATE SOLENOID CONTROL CIRCUIT SHORTED TO GROUND |

|(K139) WASTEGATE SOLENOID CONTROL CIRCUIT SHORTED TO VOLTAGE |

|WASTEGATE SOLENOID |

|ENGINE CONTROL MODULE (ECM) |

1.ACTIVE DTC

[pic]

|1. |Ignition on, engine not running. |

|2. |With the scan tool check for active DTCs |

Is the DTC active?

Yes

• Go To 2

No

• Perform the INTERMITTENT DTC Diagnostic Procedure. 

2.(A212) FUSED IGNITION SWITCH OUTPUT OPEN

[pic]

| |

|1. |Turn ignition off. |

|2. |Disconnect Wastegate Solenoid connector |

|3. |Turn ignition on, engine not running. |

|4. |With a 12-volt test light connected to ground, probe the (A212) fused ignition switch output circuit at the Wastegate |

| |Solenoid connector. |

|NOTE: |Compare the test light brightness to that of a direct connection to the battery. |

Does the test light illuminate brightly?

Yes

• Go To 3

No

• Repair the open in the (A212) Fused Ignition Switch Output circuit..

3.(K139) WASTEGATE SOLENOID CONTROL CIRCUIT OPEN

[pic]

| |

|1. |Turn ignition off. |

|2. |Disconnect the ECM C1 harness connector. |

|3. |Measure the resistance of the (K139) Wastegate Solenoid control circuit between the Wastegate Solenoid harness connector and |

| |the ECM C1 harness connector. |

Is the resistance less than 10.0 Ohms?

Yes

• Go To 4

No

• Repair the open in the (K139) Wastegate Solenoid control circuit.

4.(K139) WASTEGATE SOLENOID CONTROL CIRCUIT SHORTED TO GROUND

[pic]

| |

|1. |Ignition still off. |

|2. |Measure resistance between ground and the (K139) Wastegate Solenoid control circuit at the Wastegate Solenoid harness |

| |connector. |

Is the resistance less than 10k Ohms?

Yes

• Repair the short to ground in the (K139) Wastegate Solenoid control circuit.

No

• Go To 5

5.(K139) WASTEGATE SOLENOID CONTROL CIRCUIT SHORTED TO VOLTAGE

[pic]

| |

|1. |Turn ignition on. |

|2. |Measure the voltage of the (K139) Wastegate Solenoid control circuit at the Wastegate Solenoid harness connector. |

Is the voltage less than 1 volt?

Yes

• Go To 6

No

• Repair the short to voltage in the (K139) Wastegate Solenoid control circuit.

6.WASTEGATE SOLENOID

[pic]

| |

|1. |Turn ignition off. |

|2. |Reconnect the ECM C1 harness connector. |

|3. |Connect a 12-volt test light across the (A212) Fused Ignition Switch Output circuit and the (K139) Wastegate Solenoid control|

| |circuit at the Wastegate Solenoid harness connector. |

|4. |Turn the ignition on, engine not running. |

|NOTE: |The ECM will perform a self check of the circuit after approximately 30 seconds, which should light the 12-volt test |

| |light. |

Does the light illuminate brightly after approximately 30 seconds of ignition on?

Yes

• Replace the Wastegate Solenoid.

No

• Inspect ECM C1 connector for spread or pushed out terminals before replacing ECM. If connector and terminals look ok, replace the ECM.

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