DLC Circuit Troubleshooting
  1. Check for continuity between ECM/PCM connector terminal B18 and body ground.
Is there continuity?
YES -
Go to Step 75 .
NO -
Go to Step 76 .
  1. Continue to check for continuity between ECM/PCM connector terminal B18 and body ground, while disconnecting these parts, one at a time:
    • IMT actuator 5P connector
    • EGR valve 6P connector
    • Input shaft (mainshaft) speed sensor 3P connector
Does continuity go away when one of the above components is disconnected?
YES -
Replace the part that caused an open when it was disconnected.■
NO -
Repair short in the wire between the ECM/PCM (B18) and the IMT actuator, the EGR valve, or the input shaft (mainshaft) speed sensor.■