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 NOTE:
Diagnose and repair any 5-Volt Reference DTCs before continuing with this test procedure.
- With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
- For future reference, run and save a vehicle Scan Report and all related recorded data.
- With the scan tool, erase all DTCs.
- Turn the ignition off for a minimum of 75.0 seconds.
- Turn the ignition on.
- Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
- 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 INLET AIR PRESSURE (K68) SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Turn the ignition off.
- Disconnect the MAF/Intake Air Sensor harness connector.
- Disconnect the PCM C1 harness connector.
- Check for continuity between ground and the Inlet Air Pressure (K68) Signal circuit at the MAF/Intake Air Sensor harness connector.
Is there continuity between ground and the Inlet Air Pressure (K68) Signal circuit?
Yes
- Repair the Inlet Air Pressure (K68) Signal circuit for a short to ground.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
No
- Go To 4
- CHECK THE ABILITY OF THE PCM TO MONITOR THE MAF/INTAKE AIR SENSOR FOR PROPER OPERATION
- Turn the ignition off.
- Connect the PCM C1 harness connector.
- Turn the ignition on.
- With the scan tool check for PCM DTCs.NOTE:
The DTC - P0103-00 MASS AIR FLOW SENSOR CIRCUIT HIGH should display as active or pending with the MAF/Intake Air Sensor harness connector disconnected.
- While monitoring the scan tool, connect a jumper between the MAF Sensor (K142) Signal circuit and the Sensor (K757) Ground circuit in the MAF/Intake harness connector.NOTE:
With the jumper in place the scan tool should display DTC- P0102-00 MASS AIR FLOW SENSOR CIRCUIT LOW.
Does the scan tool display as described above?
Yes
- Replace the MAF/Intake Air Sensor in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
No
- Go To 4
- CHECK RELATED PCM AND COMPONENT CONNECTIONS
- Disconnect all PCM harness connectors.
- Disconnect all related in-line harness connections (if equipped).
- Disconnect the related component harness connectors.
- Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
- Proper connector installation.
- Damaged connector locks.
- Corrosion.
- Other signs of water intrusion.
- Weather seal damage (if equipped).
- Bent terminals.
- Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
- Terminals that have been pushed back into the connector cavity.
- Check for spread terminals and verify proper terminal tension.
Repair any conditions that are found.
- Connect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
- Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
- Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
- With the scan tool, erase DTCs.
- Test drive or operate the vehicle in accordance with the when monitored and set conditions.
- With the scan tool, read DTCs.
Did the DTC return?
Yes
- Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
No
- Repair the poor connections.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .