P1391

Test 1:

Tests 2 - 6:

Tests 7 - 11:

Tests 12 - 16:

Tests 17 - 21:

Tests 22 - 26:

Tests 27 - 31:

SYMPTOM
P1391 - NTERMITTENT LOSS OF CMP OR CKP

WHEN MONITORED
Engine running over 7 seconds.

SET CONDITION
When the expected cam signal level disagrees with the actual cam signal level.

POSSIBLE CAUSES
- CKP sensor circuit wiring harness intermittent defect
- CMP sensor signal circuit wiring harness intermittent defect
- CMP sensor defective
- Camshaft sprocket defective
- Crankshaft defective
- CKP sensor defective
- Distributor pulse ring defective
- Flywheel defective
- Camshaft target magnet defective
- Camshaft thrust plates(s) not attached
- CKP sensor connector terminals observable defect
- CKP sensor connector terminals observable defect
- PCM connector terminals observable defect (CKP sensor)
- PCM connector terminals observable defect (CMP sensor)
- Camshaft/cylinder head defective