With ECM Harness Connector Terminals

ECU Connector:

HOW TO READ CODE NUMBERS ON ECM HARNESS CONNECTOR TERMINALS
The ECM harnesses are connected with three types of connectors, each of which has specific numbers. The following inspection procedures refer to the specific numbers.

NOTE: When checking the system, note the numbers carefully to avoid wrong connections. Battery power is supplied to some terminals only when the key is in the ON position.

Diagnostic Steps:

INSPECTION PROCEDURES
The inspection based on monitored codes should be performed in the following steps.
1. Check component.
2. Check continuity between component connector and ECM connector terminals. Check harness for short to ground.
- Some circuits may operate more than one component. Be sure to disconnect all components before checking harness for short to ground.
- Disconnect the ECM and component connectors before checking harness continuity.
3. Check ECM.
- When checking ECM harness connector terminals, make connection by inserting a pin into the back side of the connector. Avoid connect the lead directly to the ECM pin.
- When no faults are found in steps 1 and 2 above, clear the ECM memory, road test vehicle and confirm that problem still exists before replacing ECM.

ECM Terminal Identification:

ECM CONNECTOR WIRE COLORS

Connectors Terminal Arrangement (female):

Correspondence Table:

CORRESPONDENCE BETWEEN ECM PIN AND CONNECTOR TERMINAL NUMBERS

Unit Inspection Data:

EXPECTED VALUES AT COMPONENT(S) WITH HARNESS DISCONNECTED

Wiring Inspection Data:

EXPECTED VALUES AT ECM WITH HARNESS DISCONNECTED