ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
ENGINE PRESSURE SENSOR OPEN OR SHORT CIRCUIT TEST - CONTINUED
N OT E
When engine harness is disconnected, all open circuit diagnostic codes for pressure sensors will be active.
This is normal. Disregard diagnostic codes for other pressure sensors. Check diagnostic codes for suspect
Use jumper wire 6 in. (15 cm) long.
Install jumper wire on ECM connector J1. Insert jumper wire between terminal for suspect sensor signal and com-
mon connection for engine's pressure sensor (terminal 3).
Use MSD to verify there is short circuit diagnostic code active.
Expected Results. Open circuit diagnostic codes and short circuit diagnostic codes are active.
If results are OK, ECM is operating properly. Proceed to step 10.
If results are NOT OK, one of these conditions exists: open circuit diagnostic code is not active when har-
ness is disconnected on short circuit diagnostic code is not active when jumper wire is installed. Perform
(a) Remove all jumpers and replace all connectors.
(b) Replace ECM (WP 0053 00). Verify repair eliminates problem.