DTC P0021 [MZI-3.7]
z
Is there continuity?
No
Go to the next step.
8
INSPECT PCM CONNECTOR FOR
POOR CONNECTION
z
Disconnect the PCM connector.
z
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
z
Is there any malfunction?
Yes Repair or replace suspected part, then go to Step
10.
No
Go to the next step.
9
INSPECT OCV (LH) CIRCUIT FOR
OPEN CIRCUIT
z
Turn the ignition switch off.
z
Measure the resistance between the
OCV (LH) connector terminal B
(wiring harness-side) and PCM
terminal 2BK (wiring harness-side).
z
Is there continuity?
Yes Go to the next step.
No
Repair or replace suspected part, Then go to the
next step.
10
VERIFY TROUBLESHOOTING OF
DTC P0020 HAS BEEN COMPLETED
z
Verify that all disconnected
connectors reconnected.
z
Turn the ignition switch to the ON
position (Engine off).
z
Clear the DTC from the PCM memory
using the M-MDS.
z
Start the engine and run it at idle.
z
Retrieve DTCs using the M-MDS.
z
Is the PENDING CODE for this DTC
present?
Yes
Replace the PCM, then go to the next step. (See
PCM REMOVAL/INSTALLATION [MZI-
3.7]
.)
No
Go to the next step.
11
VERIFY AFTER REPAIR
PROCEDURE
z
Perform the "AFTER REPAIR
PROCEDURE".
(See
AFTER REPAIR
PROCEDURE [MZI-3.7]
.)
z
Are any DTC present?
Yes
Go to the applicable DTC inspection. (See
DTC
TABLE [MZI-3.7]
.)
No
Troubleshooting completed.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:34 AM
Page 39
© 2005 Mitchell Repair Information Company, LLC.
