Engine Control Module: Testing and Inspection

Test 1 - 2:

Test 3 - 7:

Test 8 - 11:

Test 12 - 15:

SYMPTOM
CHECKING THE POWER AND GROUNDS

POSSIBLE CAUSES
- Checking the engine control relay system
- EC relay output circuit
- ECM ground circuit(s) Open
- ECM output shorted - fuse 16
- Engine control module
- Engine control Relay
- Engine control Relay B+ Supply
- Engine control relay control circuit open
- Engine control relay control circuit short to voltage
- Engine control relay output circuit(s) open
- Engine control relay output CKT shorted to ground fuse #16
- Engine control relay output CKT shorted to ground fuse #17
- Ignition switch start output circuit open
- Ignition switch start/run output circuit open
- Shorted component