Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
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 FOR OTHER DTCS
1. Refer to the recorded DTCs.
  Are there any 5-Volt Sensor Reference DTCs active or pending?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to DTC INDEX .
  No
  - Go To 3
CHECK THE (K855) 5-VOLT SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the APP Sensor harness connector.
  NOTE:
  Check the connector for proper connection to the sensor and carefully inspect for pushed out, corroded or damaged terminals in the connector before performing any electrical checks or replacing any components.
3. Turn the ignition on.
4. Measure the voltage on the (K855) 5-Volt Supply circuit at the APP Sensor harness connector.
  Is the voltage above 5.2 volts?
  
  Yes
  - Repair the (K855) 5-Volt Supply circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (K23) APP SENSOR SIGNAL 1 CIRCUIT FOR A SHORT TO BATTERY VOLTAGE
1. Measure the voltage on the (K23) APP Sensor Signal 1 circuit at the APP Sensor harness connector.
  Is the voltage above 5.2 volts?
  
  Yes
  - Repair the (K23) APP Sensor Signal 1 circuit for a short to Battery voltage.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
CHECK THE (K23) APP SENSOR SIGNAL 1 CIRCUIT FOR A SHORT TO THE (K855) 5-VOLT SUPPLY CIRCUIT
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
3. Check for continuity between the (K23) APP Sensor Signal 1 circuit and the (K855) 5-Volt Supply circuit at the APP Sensor harness connector.
  Is there continuity between the (K23) APP Sensor Signal 1 circuit and the (K855) 5-Volt Supply circuit?
  
  Yes
  - Repair the (K23) APP Sensor Signal 1 circuit for a short to the (K855) 5-Volt Supply circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 6
CHECK THE (K23) APP SENSOR SIGNAL 1 CIRCUIT FOR A SHORT TO THE (K855) 5-VOLT SUPPLY CIRCUIT
1. Check for continuity between the (K23) APP Sensor Signal 1 circuit and the (K855) 5-Volt Supply circuit at the APP Sensor harness connector.
  Is there continuity between the (K23) APP Sensor Signal 1 and the (K855) 5-Volt Supply circuit?
  
  Yes
  - Repair the (K23) APP Signal 1 circuit for a short to the (K855) 5-Volt Supply circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 7
CHECK THE ABILITY OF THE PCM TO READ THE APP SENSOR SIGNAL
1. Reconnect the PCM C1 harness connector.
2. Connect a jumper between the (K23) APP Sensor Signal 1 circuit and the (K917) APP Sensor Ground circuit at the APP Sensor harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  NOTE:
  The P2122-ACCELERATOR PEDAL POSITION SENSOR 1 CIRCUIT LOW DTC should display as active or pending with the jumper in place.
  
  Does the scan tool display as described above?
  
  Yes
  - Replace the Accelerator Pedal Position Sensor in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 8
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. Connect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Connect 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 AND INSTALLATION .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Repair the poor connections.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .