ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
ENGINE PRESSURE SENSOR OPEN OR SHORT CIRCUIT TEST - CONTINUED
Bypass harness wiring between ECM and sensor con-
Turn engine start switch to OFF position (TM 5-
Disconnect J1/P1 ECM connector and sensor
connector (WP 0053 00).
Remove sensor signal wire from ECM connec-
Remove signal wire (terminal C) from sensor
connector on engine harness.
N OT E
Use a jumper wire with the correct connectors on each end that is long enough to reach from ECM to sen-
Insert jumper wire into P1 ECM connector on engine harness. Insert other end into sensor connector of engine har-
Reconnect J1/P1 ECM engine connector and sensor connector.
Use MSD to monitor Active Diagnostic Code screen for either open circuit diagnostic code for sensor or short cir-
cuit diagnostic code for sensor.
Expected Results: Diagnostic code disappears when jumper or bypass is installed.
If results are OK, there is problem in wiring harness. Perform this repair:
(a) Replace wiring harness in question (WP 0169 00 thru WP 0175 00).
(b) Clear all diagnostic codes.
(c) Use MSD to verify repair eliminates problem.
If results are NOT OK, repeat this entire test and carefully perform each step.