P1686

Tests 1 - 3:

Test 4:

SYMPTOM
P-1686 NO SKIM BUS MESSAGE RECEIVED

WHEN MONITORED
With the ignition ON.

SET CONDITION
The PCM does not receive a CCD Bus message from the SKIM when expected.

POSSIBLE CAUSES
- PCM
- Intermittent condition
- CCD bus circuit(s) open from PCM to skim
- Loss of skim communication