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Engine Control Module: Testing and Inspection

CHECK AT THE POWERTRAIN CONTROL MODULE (PCM)

1. Disconnect the PCM connectors B-19, B-20, B-21, B-22 and B-23, and connect check harness special tool MB991923 between the PCM connectors.
2. Measure the voltage between each check harness connector terminal and check harness connector ground terminal (No. 25 or No. 29).

TERMINAL VOLTAGE CHECK CHART

NOTE:
- *1:The average voltage through an analog voltmeter is described in this service manual (because the average voltage is too stable to be shown on a digital voltmeter).
- *2:Vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting switch is in "OFF" position but is no problem for checks.

Check Harness Special Tool MB991923 Connector Terminal Arrangement (Part 1):

Check Harness Special Tool MB991923 Connector Terminal Arrangement (Part 2):

Check Harness Special Tool MB991923 Connector Terminal Arrangement (Part 3):

Check Harness Special Tool MB991923 Connector Terminal Arrangement (Part 4):

Check Harness Special Tool MB991923 Connector Terminal Arrangement (Part 5):

Check Harness Special Tool MB991923 Connector Terminal Arrangement (Part 6):

TERMINAL RESISTANCE AND CONTINUITY CHECK

PCM Harness Side Connector Terminal Arrangement (Part 1):

PCM Harness Side Connector Terminal Arrangement (Part 2):