Diagnostic Test

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

CHECK FOR AN ACTIVE DTC
NOTE:
If the P1523 DTC is present, diagnose and repair that DTC before continuing with this test procedure.
1. Start the engine and allow it to idle.
2. With a scan tool, read the DTCs.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE ENGINE OIL
NOTE:
The actuators will not operate if the oil pressure is too low or too high.
1. Check the engine for the following:
  - LOW ENGINE OIL
  - INCORRECT OIL FILTER THAT DOES NOT MEET OEM SPECIFICATIONS
  - OIL DIRTY OR DETERIORATED (Lack of scheduled oil changes)
  - CORRECT VISCOSITY AND WEIGHT
  - ENGINE OIL CONTAMINATED (i.e., coolant and/or fuel)
  Is oil level, type, condition, and filter correct?
  
  Yes
  - Go To 3
  No
  - Correct level/change engine oil and filter as required, consult the Service Information for correct type and grade of engine oil and repeat test.
CHECK OIL PRESSURE / ENGINE MECHANICAL
1. Remove the Oil Pressure Switch and install a mechanical oil pressure gauge.
2. Crank the engine for at least 10 seconds and check the oil pressure at the Oil Pressure Switch location.
  Is the oil pressure between 0.8 bar (11.6 psi) and 7.5 bar (108.8 psi)?
  
  Yes
  - Replace the Variable Valve Actuator Assembly in accordance with the Service Information. Refer to ASSEMBLY, VARIABLE VALVE ACTUATION, REMOVAL . After replacing the Variable Valve Actuator Assembly, perform the "Adaptives After Block Change" procedure with the scan tool. This function should be run after a VVA Actuator has been installed to prevent a false failure by resetting the adaptive memory back to the base calibration.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .