Diagnostic Test

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

CHECK FOR AN ACTIVE DTC
1. Start the engine and allow it to idle.
  WARNING:
  When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
2. With the scan tool, read DTCs and record on the repair order.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE (K299) O2 SENSOR 1/2 HEATER CONTROL CIRCUIT FOR A SHORT TO GROUND
1. Disconnect the PCM C2 harness connector.
2. Check for continuity between ground and the (K299) O2 Sensor 1/2 Heater Control circuit at the O2 Sensor 1/2 harness connector.
  Is there continuity between ground and the (K299) O2 Sensor 1/2 Heater Control circuit at the O2 Sensor 1/2 harness connector?
  
  Yes
  - Repair the (K299) O2 Sensor 1/2 Heater Control circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK THE O2 SENSOR 1/2 CONTROL CIRCUIT FOR PROPER OPERATION
1. Reconnect the O2 Sensor 1/2 harness connector.
2. Turn the ignition on.
3. With the scan tool, actuate the O2 Sensor 1/2 control to the maximum allowable percentage.
4. Using a 12-volt test light connected to ground, probe the (K299) O2 Sensor 1/2 Heater Control circuit at the O2 Sensor 1/2 harness connector.
  NOTE:
  The test light should flash dimly.
5. With the scan tool, actuate the O2 Sensor 1/2 control to the OFF (0%) position.
6. Using a 12-volt test light connected to ground, probe the (K299) O2 Sensor 1/2 Heater Control circuit at the O2 Sensor 1/2 harness connector.
  NOTE:
  The test light should not be illuminated.
  
  Does the test light flash with the actuator ON and not illuminate with the actuator OFF?
  
  Yes
  - Replace the O2 Sensor 1/2 in accordance with the service information. Refer to SENSOR, OXYGEN, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all PCM harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. 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.
5. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
10. 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. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Repair the poor connections as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .