Pinout Values and Diagnostic Parameters

(1) Connect the extremely fine probe (paper clip, etc.) to the probe of the voltmeter.
(2) At each terminal of the ECM connector, insert the extremely fine probe from the wire side, and measure the voltage referring to the check chart.

NOTE:
- In the state in which the connector of the ECM is connected, measure the voltage.
- Measure the voltage across each terminal to the terminal No. 26 (ground terminal).
- You may find it convenient to pull out the ECM to make it easier to reach the connector terminals.
- Inspection need not be executed in the chart's sequence.

CAUTION:
- Short-circuiting the positive (+) probe between a connector terminal and ground could damage the vehicle wiring, the sensor, the ECM or all there. Use care to prevent this!

(3) If voltmeter shows any deviation from standard value, check the corresponding sensor, actuator and related electrical wiring, then repair or replace.
(4) After repair or replacement, recheck with the voltmeter to confirm that the repair has corrected the problem.




















Terminal voltage check chart
Terminal arrangement of engine control module connector

NOTE:
*1: (Up to 1995 models)
*2: (From 1996 models)