Engine Control Module: Testing and Inspection

CHECK AT THE ENGINE CONTROL MODULE (ECM) [M/T] OR THE POWERTRAIN CONTROL MODULE [PCM) [A/T]

1. Disconnect the ECM [M/T] or the PCM [A/T] connectors B-19, B-20, B-21, B-22 and B-23, and connect check harness special tool MB991923 between the ECM [M/T] connectors or the PCM [A/T] 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).
- Vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting switch is in "OFF" position but is no problem for checks.

Terminal Voltage Check Chart (Part 1):

Terminal Voltage Check Chart (Part 2):

Terminal Voltage Check Chart (Part 3):

Terminal Voltage Check Chart (Part 4):

Terminal Voltage Check Chart (Part 5):

Terminal Voltage Check Chart (Part 6):

Terminal Voltage Check Chart (Part 7):

TERMINAL RESISTANCE AND CONTINUITY CHECK

Terminal Resistance And Continuity Check (Part 1):

Terminal Resistance And Continuity Check (Part 2):

Terminal Resistance And Continuity Check (Part 3):