Mazda CX-9 Grand Touring 2009 Manual page 900

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
position.
Clear the DTC from the PCM memory
using the M-MDS.
Start the engine.
Is the same DTC present?
VERIFY AFTER REPAIR PROCEDURE
Perform the "AFTER REPAIR
PROCEDURE".
7
(See AFTER REPAIR PROCEDURE
[MZI-3.7].)
Are any DTCs present?
DTC P0020 [MZI-3.7]
DTC P0020 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P0020 CMP actuator circuit open (LH)
DETECTION
CONDITION
POSSIBLE CAUSE
2008 Mazda CX-9 Grand Touring
The PCM monitors the OCV (LH) circuit to the PCM for high and low voltage. The
test fails if the voltage exceeds or falls below a calibrated limit for a calibrated
amount of time.
OCV (LH) malfunction
Connector or terminal malfunction
Open circuit between OCV (LH) terminal A and main relay No.1 terminal D
Open circuit between OCV (LH) terminal B and PCM terminal 2BK
Short to ground circuit between OCV (LH) terminal B and PCM terminal 2BK
Short to power supply between OCV (LH) terminal B and PCM terminal 2BK
No Go to the next step.
Go to the applicable DTC inspection. (See
Yes
DTC TABLE [MZI-3.7].)
No Troubleshooting completed.