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 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, erase DTCs in the Powertrain Control Module (PCM).
3. Test drive the vehicle under the conditions in which the DTC is monitored.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE (K76) VVT INTAKE SOLENOID 1/1 DRIVER CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the VVT Intake Solenoid 1/1 harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (K76) VVT Intake Solenoid 1/1 Driver circuit at the VVT Intake Solenoid 1/1 harness connector.
  NOTE:
  There should be no voltage present unless you have a short to voltage, except for a brief period immediately after turning ignition on.
  
  Is there any voltage present?
  
  Yes
  - Repair the (K76) VVT Intake Solenoid 1/1 Driver circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (K76) VVT INTAKE SOLENOID 1/1 DRIVER CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Check for continuity between ground and the (K76) VVT Intake Solenoid 1/1 Driver circuit at the VVT Intake Solenoid 1/1 harness connector.
  Is there continuity between ground and the (K76) VVT Intake Solenoid 1/1 Driver circuit?
  
  Yes
  - Repair the (K76) VVT Exhaust Solenoid 1/1 Driver circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (K76) VVT INTAKE SOLENOID 1/1 DRIVER 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 (K76) VVT Intake Solenoid 1/1 Driver circuit between the VVT Intake Solenoid 1/1 harness connector and the GPEC Adaptor.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the (K76) VVT Intake Solenoid 1/1 Driver circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE VVT INTAKE SOLENOID 1/1 GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance between ground and the VVT Intake Solenoid 1/1 Ground circuit at the VVT Intake Solenoid 1/1 harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the VVT Intake Solenoid 1/1 Ground circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
VVT INTAKE SOLENOID 1/1 ACTUATION
1. Reconnect the PCM C2 harness connector.
2. Turn the ignition on.
3. Measure the voltage between ground and the (K76) VVT Intake Solenoid 1/1 Driver circuit in the VVT Intake Solenoid 1/1 harness connector.
4. With the scan tool, actuate the VVT Intake Solenoid 1/1 Control.
  NOTE:
  The VVT Solenoid Driver circuit is a 12 volt PWM circuit. The voltage reading will vary depending on the actuation percentage that is selected for the solenoid.
  
  Is there voltage present and does it match approximately to the percentage selected?
  
  Yes
  - Replace the VVT Intake Solenoid 1/1 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 VVT Intake Solenoid 1/1 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 .