P1687

Tests 1 - 4:

Tests 5 - 8:

Test 9:

SYMPTOM
P1687 - NO CLUSTER BUS MESSAGES

POSSIBLE CAUSES
- Instrument cluster
- Open CCD (+) circuit
- Open CCD (-) circuit
- Wiring harness intermittent problem
- PCM CCD Bus circuit open
- PCM CCD Bus shorted to B(+)
- PCM internal CCD Bus open