DTC P2121, P2126, P2131 [MZI-3.7]
DTC P2121, P2126, P2131 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
terminal A and B.
z
Is the resistance more than 10 kilohms?
to the next step.
9
VERIFY TROUBLESHOOTING OF DTC
P2112 HAS BEEN COMPLETED
z
Verify that all disconnected connectors
reconnected.
z
Clear the DTC from the PCM memory using
the M-MDS.
z
Perform the "KOEO or KOER self-test" using
the M-MDS.
(See
KOEO/KOER SELF TEST [MZI-
3.7]
.)
z
Is the PENDING CODE for the 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.
10
VERIFY AFTER REPAIR PROCEDURE
z
Perform the "AFTER REPAIR
PROCEDURE". (See
AFTER REPAIR
PROCEDURE [MZI-3.7]
.)
z
Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See
DTC TABLE [MZI-3.7]
.)
No
Troubleshooting completed.
DTC P2121
APP sensor No.1 circuit range/performance
DTC P2126
APP sensor No.2 circuit range/performance
DTC P2131
APP sensor No.3 circuit range/performance
DETECTION
CONDITION
z
APP sensor fault flag is set for sensor No.1, No.2 and No.3 by the PCM,
indicating the signal is out of the normal self-test operating range.
z
APP sensor signal circuits are shorted each other
z
APP sensor malfunction
z
PCM malfunction
P2121
{
Open circuit wiring harness between APP sensor terminal E and PCM
terminal 1AK
{
Short to ground circuit between APP sensor terminal E and PCM terminal 1
AK
{
Short to power supply in wiring harness between APP sensor terminal E
and PCM terminal 1 AK
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:42 AM
Page 378
© 2005 Mitchell Repair Information Company, LLC.
