Supra L6-183 2997cc 3.0L DOHC (2JZ-GE) (1993)
Engine Control Module: Testing and Inspection
The connectors of the engine control module (ECM) are water-proof and are the bolt type.
For water proof type connectors, in order to measure the voltage of ECM terminals and the resistance of connected parts, connect the inspection sub wire
harness between the ECM and vehicle wire harness, then perform the inspection. The inspection method of inserting a tester probe from the other side of
connector noticeably reduces the water-proof ability. Therefore, it is recommended that you use the following procedure.
INSPECTION PREPARATION
1. Turn the ignition switch to LOCK position.
2. Turn up the passenger side floor mat.
3. Remove the ECM protector.
4. Disconnect the connector from the ECM by fully loosening the bolt.
HINT: After completely loosening the bolt, the 2 parts of the connector can be separated.
NOTICE:
^ Do not pull the wire harness when disconnecting the connector.
^ When disconnecting the connector, the ECM's back-up power source is cut off, so the malfunction codes, etc. recorded in the ECM memory
are cancelled.
^ Never insert a tester probe or male terminal used for inspection purposes into the female terminal of the vehicle wire harness. Otherwise, the
female terminal may be widened, which can result in faulty connection.
5. Connect the Check Harness A (SST 09990-01000) between ECM and connector of vehicle wire harness.
HINT: The arrangement of the check connector terminals are the same as those of the ECM.
ECM INSPECTION
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Inspect the ECM terminals using the "Standard Values Chart for ECM Terminals" under Specifications \ Electrical.
See: Specifications
FOLLOWING THE INSPECTION
1. Disconnect the Check Harness A.
2. Reconnect the connector to the ECM.