P0685-ASD RELAY CONTROL CIRCUIT SHUTS OFF TOO LATE

For a complete wiring diagram Refer to Section 8W

When Monitored:
During after-run.
Set Condition:
The internal ECM timer determines that the ASD Relay did not shut off after the AFTER-RUN mode of operation has been completed.

Possible Causes

CHECK FOR OTHER DTCS

INTERMITTENT CONDITION

SUBSTITUTE ASD RELAY

ASD RELAY CONTROL CIRCUIT OPEN INTERMITTENTLY

ENGINE CONTROL MODULE

Diagnostic Test

1.CHECK FOR OTHER 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 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

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2.CLEAR CODE AND CHECK IF THE DTC RESETS

NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.

NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.

Did this DTC set again?

Yes

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Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

3.ASD RELAY

Did this DTC set again?

Yes

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Replace the ASD Relay.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

4.ASD RELAY CONTROL CIRCUIT OPEN INTERMITTENTLY

Was the resistance above 10.0 ohms at any time while wiggling the wiring harness and connectors?

Yes

Repair the ASD Relay Control circuit for an intermittent open.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Replace and program the Engine Control Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).