Connect the scan tool to the data link connector(DLC) and turn the ignition switch ON.
Go to the actuation test for driving the glow relay.
Press on the START key
DOES THE GLOW PLUG REALY ON WITH THE OPERATION NOISE ?
YES
Make sure there is no the DTC in the diagnostic trouble codes menu
NO
Recheck the fuse and the glow plug relay
Recheck the wiring harness
Go to step 5
Connect the LED lamp at the glow plug relay terminal 2 after disconnecting the glow realy.
Check the ground condition with the LED lamp when pressing on the START key.
IS THERE LED GREEN LAMP(GROUND) LIGHTED ?
YES
Make sure there is no the DTC in the diagnostic trouble codes menu
NO
Recheck open or short in the wire between the glow relay terminal 2 and the ECM terminal 15/C230-1.
Go to step 8
Check the ground condition with the LED lamp at the ECM terminal 15/C230-1 directly.
IS THERE LED GREEN LAMP(GROUND) LIGHTED ?
YES
Make sure there is no the DTC in the diagnostic trouble codes menu
NO
Replace a known - good ECM and recheck. if the LED green lamp is ON, replace the ECM.
MONITORING FOR PENDING DTC SET ?
YES
Go to the applicable troubleshooting procedure.
NO
System OK