Many malfunctions in the electrical system are caused by poor harness(s) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Check the following conditions:
Check for damaged harness and terminals: contact resistance, oxidation, bent or broken terminals.
Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection
Use a suitable male pin to ensure that contact in sockets is good. The pin should remain in position when pulled gently.
Has a problem been found?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
Fault is intermittent caused by poor contact in the sensor＇s and/or PCM＇s connector or was repaired and PCM memory was not cleared.
System OK
Turn ignition switch to OFF
Disconnect STOP LAMP SWITCH connector and JOINT CONNECTOR
Measure resistance between terminal 1 and 2 of the STOP LAMP SWITCH harness connector.
Specification : Infinite
Does each resistance indicate open?
YES
Go to "Signal circuit inspection" of the "W/Harness Inspection" procedure
NO
Repair short to battery in harness and Go to "Verification of Vehicle Repair" procedure
Turn ignition switch to OFF
Disconnect STOP LAMP SWITCH connector and connector C21-4 of the PCM
Measure resistance between terminal 2 of the STOP LAMP SWITCH harness connector and terminal 10/C21-4 of the PCM
In case vehicle have ABS which is installed, ABS ECU must be disconnected.
Specification : below 1 Ω
Does each resistance indicate continuity?
YES
Go to "Component Inspection" of the "W/Harness Inspection" procedure
NO
Repair short to battery in harness and Go to "Verification of Vehicle Repair" procedure
If OK, harness Which is inputed to ABS is Short to Power. Therefore check for ABS harness and JOINT CONECTOR(M09).
