P1488

Tests 1 - 3:

Tests 4 - 8:

Tests 9 - 11:

SYMPTOM
P1488 - AUXILIARY 5 VOLT OUTPUT TOO LOW

POSSIBLE CAUSES
- 5 volt supply circuit open
- 5 volt supply circuit shorted to ground
- MAP sensor wiring harness intermittent defect
- MAP sensor wiring harness observable defect
- Camshaft Position Sensor
- Manifold Air Pressure Sensor
- Oil pressure sensor
- Water in fuel sensor
- Engine Control Module