P068B

P068B-ECM RELAY OFF TOO LATE





For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
When the ignition is turned off, during after-run mode of operation.

- Set Condition:
The internal ECM timer determines that the ASD Relay remained on for 2.0 seconds once AFTER-RUN mode of operation has been completed.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Initial Inspection and Diagnostic Overview

Diagnostic Test

1. CHECK FOR OTHER DTCS
Turn the ignition on.
With the scan tool, check for additional DTCs.
Are other DTCs present?

Yes

- Refer to the Symptom List for diagnosis of the other DTCs before continuing.
- Perform the ECM Verification Test Ver. 1. Verification Tests

No

- Go To2

2. CLEAR CODE AND CHECK IF THE DTC RESETS
Perform several ignition key cycles, pausing for at least 10 seconds between each cycle.
Turn the ignition on.
With the scan tool, read ECM DTCs.
Did this DTC set again?

Yes

- Go To 3

No

- Go To 6

3. ASD RELAY
Turn the ignition off.
Install a substitute relay in place of the ASD Relay.
Turn the ignition on.
With the scan tool, erase DTCs.
Perform several ignition key cycles, pausing for at least 10 seconds between each cycle.
Turn the ignition on.
With the scan tool, read ECM DTCs.
Did this DTC set again?

Yes

- Go To 4

No

- Replace the ASD Relay.
- Perform the ECM Verification Test Ver. 1. Verification Tests

4. (K342) ASD RELAY CONTROL CIRCUIT SHORTED TO GROUND INTERMITTENTLY
Turn the ignition off.
Remove the ASD Relay from the PDC.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the ASD Relay Control circuit while wiggling the wiring harness and connectors.
Was the resistance below 1000 ohms at any time while wiggling the wiring harness and connectors?

Yes

- Repair the ASD Relay Control circuit for an intermittent short to ground.
- Perform the ECM Verification Test Ver. 1. Verification Tests

No

- Go To 5

5. ASD RELAY OUTPUT CIRCUIT SHORTED TO VOLTAGE
Turn the ignition on.
Measure the voltage of the ASD Relay Output circuit.
Is the voltage below 1.05 volt?

Yes

- Replace and program the Engine Control Module.
- Perform the ECM Verification Test Ver. 1. Verification Tests

No

- Repair the ASD Relay Output circuit for a short to voltage.
- Perform the ECM Verification Test Ver. 1. Verification Tests

6. INTERMITTENT CONDITION

WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.

NOTE: The conditions that set the DTC are not present at this time. The following list may help in identifying the intermittent condition.

With the engine running at normal operating temperature, monitor the scan tool parameters related to the DTC while wiggling the wiring harness. Look for parameter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the conditions under which the DTC was set.
Search for any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Were any of the above conditions present?

Yes

- Repair as necessary.
- Perform the ECM Verification Test Ver. 1. Verification Tests

No

- Test Complete.