Checking the PCM Power and Ground Circuits

Tests 1 - 2:

Tests 3 - 7:

Tests 8 - 12:

Tests 13 - 14:

SYMPTOM
CHECKING THE PCM POWER AND GROUNDS

POSSIBLE CAUSES
- Oil pressure sensor
- Governor pressure sensor
- Fused ignition switch output circuit open
- PCM ground circuit(s) open
- Camshaft Position Sensor
- Crankshaft Position Sensor
- MAP sensor
- TPS (5 volt supply)
- TPS ground circuit shorted to voltage
- PCM 5 volt primary supply circuit shorted to ground
- PCM 5 volt secondary supply circuit shorted to ground
- Fused B(+) circuit less than 10.0 volts
- Powertrain Control Module (5 volt)