Connect GDS and select "Diagnostic Trouble Codes(DTC)" mode.
IG "ON".
Using a GDS, Clear DTC.
IG "OFF".
Disconnect ECU's connector which is connected to CAN Bus.
IG "ON".
Connect GDS and select "Diagnostic Trouble Codes(DTC)" mode.
Are any DTCs present?
![]() | ▶ Go to step 1 of the component inspection and disconnect another ECU's connector which is connected to CAN Bus in step 5. ▶ Repeat above step until test completed on all ECU in CAN bus. ▶ If DTC is present after above test, substitute with a known-good PCM(TCM) and check for proper operation. If problem is corrected, replace PCM(TCM) and then go to "Verification of Vehicle Repair" procedure. |
![]() | ▶ Fault is intermittent caused by faulty HECU or PCM(TCM). Go to "Verification of Vehicle Repair" procedure. |