DTC P0012:00 [MZR 1.6]

id0102h3700200

DTC P0012:00

CMP-timing over-retarded
DETECTION CONDITION
•  If the actual valve timing retards excessively against the target valve timing with the following condition met:
―  Variable valve timing control: feedback mode
Diagnostic support note
•  This is a continuous monitor (CCM).
•  The check engine light illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
•  PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
•  DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  Engine oil malfunction
―  Low engine oil pressure
―  Improper engine oil viscosity
•  Loose timing chain or improper valve timing due to timing chain slippage
•  OCV malfunction
―  Spool valve in OCV is stuck in retard position
•  Following oil runners are clogged or have leakage:
•  Between oil pressure switch and OCV
•  Between OCV and variable valve timing actuator
•  In variable valve timing actuator
•  Variable valve timing actuator is stuck in retard position
•  PCM malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (Mode 2)/snapshot data on repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY ENGINE OIL PRESSURE
•  Start the engine.
•  Does the engine oil warning light illuminate?
Yes
Inspect the engine oil pressure.
(See OIL PRESSURE INSPECTION [MZR 1.6].)
Repair or replace the malfunctioning part according to the inspection results, then go to Step 7.
No
Go to the next step.
4
INSPECT INSTALLATION OF TIMING CHAIN
•  Inspect the installation of timing chain.
•  Is the camshaft timing mark at correct point?
Yes
Go to the next step.
No
Reinstall the timing chain, then go to Step 7.
(See TIMING CHAIN REMOVAL/INSTALLATION [MZR 1.6].)
5
INSPECT OCV
•  Inspect the OCV.
•  Is there any malfunction?
Yes
Replace the OCV, then go to Step 7.
(See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [MZR 1.6].)
No
Go to the next step.
6
INSPECT ENGINE OIL RUNNER
•  Inspect the following engine oil runners for clogging or leakage:
―  Between the oil pressure switch and the OCV
―  Between the OCV and the variable valve timing actuator
―  In the variable valve timing actuator
•  Is there any clogging or leakage?
Yes
Repair or replace the suspected runner, then go to the next step.
No
Variable valve timing mechanism is normal.
Note
•  This DTC is detected by intermittent concern.
•  Intermittent concern might be removed by cleaning mode of variable valve timing control function.
Go to the next step.
7
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Switch the ignition ON (engine off).
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Perform the PID/DATA Monitor and Record Procedure and access the RPM PID using the M-MDS.
•  Warm up the engine completely.
•  Turn off all electrical roads.
•  Increase and keep the engine speed 2,500 rpm or more for 10 s.
•  Perform the KOER self test.
•  Is the PENDING CODE for this DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 1.6].)
No
DTC troubleshooting completed.