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Symptom:
P0685-ASD RELAY CONTROL CIRCUIT SHUTS OFF TOO EARLY
When Monitored and Set Condition:
P0685-ASD RELAY CONTROL CIRCUIT SHUTS OFF TOO EARLY
When Monitored: During after-run.
Set Condition: The internal ECM timer determines that the ASD Relay has shut off
before the AFTER-RUN mode of operation has been completed.
CHECK FOR OTHER DTCS
INTERMITTENT CONDITION
SUBSTITUTE ASD RELAY
ASD RELAY CONTROL CIRCUIT OPEN INTERMITTENTLY
ENGINE CONTROL MODULE
TEST
1
Turn the ignition on.
With the DRB, check for additional DTCs.
Are other DTCs present?
Yes → Refer to the Symptom List for diagnosis of the other DTCs before
→ Go To 2
No
2
Turn the ignition on.
With the DRB, erase ECM DTCs.
Perform several ignition key cycles, pausing for at least 10 seconds between each
cycle.
Turn the ignition on.
With the DRB, read ECM DTCs.
Did this DTC set again?
Yes → Go To 3
→ Go To 5
No
3
Turn the ignition off.
Install a substitute relay in place of the ASD Relay.
Perform several ignition key cycles, pausing for at least 10 seconds between each
cycle.
Turn the ignition on.
With the DRB, read ECM DTCs.
Did this DTC set again?
Yes → Go To 4
→ Replace the ASD Relay.
No
POSSIBLE CAUSES
ACTION
continuing.
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
DRIVEABILITY - DIESEL
149
APPLICABILITY
All
All
All
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