Diagnostic Test

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

CHECK FOR AN ACTIVE DTC
NOTE:
Diagnose and repair any system voltage or sensor reference voltage DTCs before continuing with this test.
1. Start the engine and allow it to reach normal operating temperature.
  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 (K237) SRV SENSE OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Short Runner Valve Actuator harness connector.
3. Disconnect the PCM C2 harness connector.
4. Turn the ignition on.
5. With the scan tool, actuate the Auto Shutdown (ASD) Relay Control State.
6. Measure the voltage on the (K237) SRV Sense Output circuit at the Short Runner Valve Actuator harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (K237) SRV Sense Output circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (K237) SRV SENSE OUTPUT CIRCUIT FOR A SHORT TO THE (F343) FUSED ASD RELAY OUTPUT CIRCUIT
1. Turn the ignition off.
2. Check for continuity between the (K237) SRV Sense Output circuit and the (F343) Fused ASD Relay Output circuit at the Short Runner Valve Actuator harness connector.
  Is there continuity between the (K237) SRV Sense Output circuit and the (F343) Fused ASD Relay Output circuit?
  
  Yes
  - Repair the (K237) SRV Sense Output circuit for a short to the (F343) Fused ASD Relay Output circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (Z904) SRV GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance between ground and the (Z904) SRV Ground circuit at the Short Runner Valve Actuator harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the (Z904) SRV Ground circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
SHORT RUNNER VALVE
1. Turn the ignition off.
2. Connect the PCM C2 harness connector.
3. Connect a jumper between the (K237) SRV Sense Output circuit and the (Z904) SRV Ground circuit in the Short Runner Valve Actuator harness connector.
4. Turn the ignition on.
5. With the scan tool, read the Short Runner Valve signal voltage.
  Is the voltage below 0.1 volt with the jumper in place?
  
  Yes
  - Replace the Short Runner Valve in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 6
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Short Runner Valve and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
5. Look for the data to change or for the DTC to reset during the wiggle test.
6. Perform any Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - 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 .