Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Start the engine and allow it to idle.
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.
  Is the P1523 DTC active or pending?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to 2.0L - DIAGNOSTIC CODE INDEX .
  No
  - Go To 3
CHECK THE ENGINE OIL
NOTE:
The actuators will not operate if the oil pressure is too low, contaminated or incorrect oil is used.
1. Check the engine for the following:
  - LOW ENGINE OIL -. Refer to LUBRICATION, DIAGNOSIS AND TESTING .
  - INCORRECT OIL FILTER THAT DOES NOT MEET OEM SPECIFICATIONS
  - OIL DIRTY OR DETERIORATED (Lack of scheduled oil changes)
  - CORRECT OIL VISCOSITY AND WEIGHT
  - ENGINE OIL CONTAMINATED (i.e., coolant and/or fuel)
  Is oil level, type, condition, and filter correct?
  
  Yes
  - Go To 4
  No
  - Correct level/change engine oil and filter as required, consult the Service Information for correct type and weight 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 TIMING, PHASER / OIL CONTROL VALVE, REMOVAL AND INSTALLATION . 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 PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .
  No
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .