Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
![]() | ▶ Repair as necessary and go to "verification of vehicle repair" procedure. |
![]() | ▶ Go to "Power circuit inspection" procedure. |
Connect the "PCM/TCM" connector.
IG "ON" & Engine "OFF" .
Measure the voltage between "Solenoid Supply" terminal of solenoid valve connector and chassis ground.
Specification : Battery Voltage
Is the measured voltage within specifications?
![]() | ▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM/TCM's connector or was repaired and PCM/TCM memory was not cleared. Throughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage.Repair or replace as necessary and go to "verification of vehicle repair" procedure. |
![]() | ▶ Check open or short in harness. Repair as necessary and then, go to "Verification of Vehicle" procedure. ▶ If there is no problem in harness, substitute with know-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM as necessary and then go to "Verification of Vehicle Repair" procedure. |