Diagnostic Test
WARNING: This page is about a different variant/trim than selected.
- CHECK FOR AN ACTIVE DTC
- With the scan tool, read Powertrain Control Module 2 (PCM-2) DTCs and Freeze Frame Data and record on the repair order.
- Using the recorded Freeze Frame Data and the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
- With the scan tool, read PCM-2 DTCs.
Is the DTC active or pending?
Yes
- Go To 2
No
- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
- CHECK THE (K43) O2 SENSOR 2/1 SIGNAL CIRCUIT
- Turn the ignition off.
- Disconnect the O2 Sensor 2/1 harness connector.
- Turn the ignition on.
- With the scan tool, monitor the O2 Sensor 2/1 voltage.
Is the O2 Sensor 2/1 voltage between 4.1 and 5.0 volts?
Yes
- Replace the O2 Sensor 2/1 in accordance with the Service Information. Refer to SENSOR, OXYGEN, REMOVAL AND INSTALLATION .
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 3
- CHECK THE (K43) O2 SENSOR 2/1 SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Disconnect the PCM-2 C2 harness connector.
- Check for continuity between ground and the (K43) O2 Sensor 2/1 Signal circuit at the O2 Sensor 2/1 harness connector.
Is there continuity between ground and the (K43) O2 Sensor 2/1 Signal circuit?
Yes
- Repair the (K43) O2 Sensor 2/1 Signal circuit for a short to ground.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 4
- CHECK FOR THE (K43) O2 SENSOR 2/1 SIGNAL CIRCUIT SHORTED TO THE O2 SENSOR 2/1 HEATER GROUND CIRCUIT
- Check for continuity between the (K43) O2 Sensor 2/1 Signal circuit and the O2 Sensor 2/1 Heater Ground circuit at the O2 Sensor 2/1 harness connector.
Is there continuity between the (K43) O2 Sensor 2/1 Signal circuit and the O2 Sensor 2/1 Heater Ground circuit?
Yes
- Repair the short between the (K43) O2 Sensor 2/1 Signal circuit and the O2 Sensor 2/1 Heater ground circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 5
- Check for continuity between the (K43) O2 Sensor 2/1 Signal circuit and the O2 Sensor 2/1 Heater Ground circuit at the O2 Sensor 2/1 harness connector.
- CHECK RELATED HARNESS CONNECTIONS
- Disconnect all PCM-2 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-2 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 2 (PCM-2) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL AND INSTALLATION .
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- Test complete.