Engine Control Module: Testing and Inspection

ECM Removal/Installation
1. Remove the negative battery cable.
2. Remove in the order shown in the figure.
3. Install in the reverse order of removal.




1. ECM connector
2. ECM

INSPECTION
1. Lift up the floor covering in front of the passenger's seat.




2. Connect the (SST) Special Service Tool (Engine Signal Monitor) between the engine control module and the wiring harness by using the SST (Adapter, Harness adapter power) as shown.




3. Place the SST (Sheet) on the SST (Engine Signal Monitor).
4. Measure the voltage at each terminal.
5. If any engine control module terminal voltage is incorrect, check the input or output device and related wiring.
6. If they are normal, replace the engine control module.




CAUTION
- Applying voltage to SST terminals A or B will damage the SST.

NOTE
- If the tires are rotated by using a chassis roller with the ignition switch at ON, the ABS control module may memorize the action as a malfunction and the ABS warning light may illuminate. (Refer to the Troubleshooting Notes for the antilock brake system). If the ignition switch is turned to LOOK and then to ON again, the ABS warning light will not illuminate, because the action will be considered a past malfunction.