Pinout Values and Diagnostic Parameters

Engine Control Module (ECM) Harness Protector:

PREPARATION
1. Remove Engine Control Module (ECM) harness protector.

Engine Control Module (ECM) Pin Test (Recommended Probing Methods):

2. Perform all voltage measurements with connectors connected. Extend tester probe as shown to improve access and reduce the chance of damaging pin connectors.

Engine Control Module (ECM) Inspection Table:

EXPECTED PIN VOLTAGES

Engine Control Module (ECM) Terminal Layout:

TERMINAL LAYOUT

NOTE: Testing of circuit voltages can be done at the ECM connector by CAREFULLY backprobing the connector. Use a high-quality Digital Volt Ohm Meter (DVOM).