DTC P0053, P0054, P0059, P0060 [MZI-3.7]
DTC P0053, P0054, P0059, P0060 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
HO2S wiring harness connector (s) for any
indication of crossed wires (Also, stretched
or incorrectly mounted wiring harnesses).
z
Are there crossed connections or wires?
No
Go to the next step.
4
VERIFY TROUBLESHOOTING OF DTC
P0040, P0041 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.
5
VERIFY AFTER REPAIR PROCEDURE
z
Perform "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.
DTC P0053
P0053: Front HO2S (RH) heater resistance
DTC P0054
P0054: Rear HO2S (RH) heater resistance
DTC P0059
P0059: Front HO2S (LH) heater resistance
DTC P0060
P0060: Rear HO2S (LH) heater resistance
DETECTION
CONDITION
z
Heater current requirements too low or high in the heated oxygen sensor
(HO2S) heater control circuit.
POSSIBLE CAUSE
z
Open circuit between HO2S terminal C and main relay No.1 terminal E
z
Short to ground circuit between HO2S terminal A and body ground
z
HO2S circuits are shorted each other
z
DTC P0053: Open circuit between front HO2S (RH) terminal A and PCM
terminal 2J
z
DTC P0054: Open circuit between rear HO2S (RH) terminal A and PCM
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 44
© 2005 Mitchell Repair Information Company, LLC.
