Glow Plug Control Circuit Preglow Fault

Test 1 - Test 2:

Test 3 - Test 6:

SYMPTOM
P2537-GLOW PLUG CONTROL CIRCUIT PREGLOW FAULT

TEST NOTE
This symptom is diagnosed using the test P1482-GLOW PLUG MODULE - COMMUNICATION ERROR.

POSSIBLE CAUSES
- Engine control module
- Glow plug control signal circuit open
- Glow plug control signal circuit shorted to ground
- Glow plug control signal circuit shorted to voltage
- Glow plug module
- Intermittent condition