Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN
1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
2. For future reference, run and save a vehicle Scan Report and all related recorded data.
3. With the scan tool, erase all DTCs.
4. Turn the ignition off for a minimum of 75.0 seconds.
5. Turn the ignition on.
6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
7. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK THE GLOW PLUG 1 (A202) CONTROL CIRCUIT FOR A SHORT TO GROUND
1. Measure the resistance between ground and the Glow Plug 1 (A202) Control circuit at the Glow Plug 1 harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 3
  No
  - Repair the Glow Plug 1 (A202) Control circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
CHECK THE GLOW PLUG 1 FOR PROPER OPERATION
1. Turn the ignition off.
2. Replace the Glow Plug in accordance with the Service Information.
3. Turn the ignition on.
4. With the scan tool, erase PCM DTCs.
5. Perform several ignition key cycles leaving the ignition on for at least 10 seconds per cycle.
6. With the scan tool, read PCM DTCs.
  Does the scan tool display this DTC?
  
  Yes
  - Go To 4
  No
  - Test complete.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
CHECK THE GLOW PLUG MODULE FOR PROPER OPERATION
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Glow Plug and the Glow Plug Module.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Replace the Glow Plug Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .