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 OFF → ON and disconnect ATM SOLENOID VALVE connector
Measure resistance between terminal 4 of the ATM SOLENOID VALVE harness connector and terminal 6 of the PCM harness connector
Test condition : Ignition " ON "
Specification: 12V is measured for approx. 0.5sec
Is 12 V measured for approx. 0.5 sec ?
YES
Go to "Signal circuit open inspection" procedure
NO
Check for open and short in harness between terminal 9 of the ATM SOLENOID VALVE harness connector and terminal 3 o f the ATM CONTROL RELAY harness connector (if line is faulty, it will be displayed with UD, OD Solenoid Valve trouble code.)
Repair as necessary and Go to "Verification Vehcle Repair" procedure
Turn ignition switch OFF and disconnect PCM connector
Measure resistance between terminal 4 of the ATM SOLENOID VALVE harness connector and terminal 16 of the TCM harness connector
Specification: below 1 Ω
Does resistance indicate continuity?
YES
Go to "PCM Inspection" of the "Component Inspection" procedure
NO
Repair open in harness and Go to "Verification of Vehicle Repair" procedure
Turn ignition switch OFF and disconnect TCM connector
Measure resistance between terminal 6 of the TCM harness connector and chassis ground
Specification: Infinite
Does resistance indicate infinite ?
YES
Go to Component Inspection procedure
NO
Repair short in harness and Go to "Verification of Vehicle Repair" procedure
