Diagnostic Test

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

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, erase DTCs.
3. 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.
4. 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 (Z904) GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the Short Runner Valve Actuator harness connector.
3. Using a 12-volt test light connected to 12 volts, check the (Z904) Ground circuit in the Short Runner Valve Actuator harness connector.
  NOTE:
  The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
  
  Is the test light illuminated and bright?
  
  Yes
  - Go To 3
  No
  - Repair the (Z904) Ground circuit for an open circuit or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE (K238) SRV CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (K238) SRV Control circuit in the Short Runner Valve Actuator harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (K238) SRV Control circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (K238) SRV CONTROL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Check for continuity between ground and the (K238) SRV Control circuit in the Short Runner Valve Actuator harness connector.
  Is there continuity between ground and the (K238) SRV Control circuit?
  
  Yes
  - Repair the (K238) SRV Control circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
CHECK THE (K238) SRV CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
CAUTION:
Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.
1. Connect the (special tool #10436, Adapter, GPEC Diagnostic).
2. Measure the resistance of the (K238) SRV Control circuit between the Short Runner Valve Actuator harness connector and the GPEC Adaptor.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the (K238) SRV Control circuit for an open circuit or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
SHORT RUNNER VALVE
1. Connect the PCM C2 harness connector.
2. Turn the ignition on.
3. With the scan tool, actuate the Short Runner Valve control to the ON (100%) position.
4. Using a 12-volt test light connected to ground, check the (K238) SRV Control circuit in the Short Runner Valve Actuator harness connector.
  NOTE:
  The test light should be illuminated and bright with the control actuated ON (100%). Compare the brightness to that of a direct connection to the battery.
5. With the scan tool, actuate the Short Runner Valve control to OFF (0%).
6. Using a 12-volt test light connected to ground, check the (K238) SRV Control circuit in the Short Runner Valve Actuator harness connector.
  NOTE:
  The test light should not be illuminated with the control actuated OFF (0%).
  
  Is the test light illuminated and bright with the control actuated ON and not illuminated with the control actuated OFF?
  
  Yes
  - Replace the Short Runner Valve Actuator in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 7
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Short Runner Valve Actuator 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. 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 .