Mazda CX-7 2007 Workshop Manual page 122

STEP
3 VERIFY RELATED PENDING OR STORED DTC
• Turn the ignition switch off, then to the ON
position (Engine off).
• Verify the pending code or stored DTCs using
the M-MDS.
• Are other DTCs present?
4 IDENTIFY TRIGGER DTC FOR FREEZE FRAME
DATA
• Is DTC P0132 on FREEZE FRAME DATA?
5 INSPECT FRONT HO2S CONNECTOR FOR
POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the front HO2S connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
6 INSPECT FRONT HO2S CIRCUIT FOR SHORT
TO POWER SUPPLY
• Turn the ignition switch to the ON position
(Engine off).
• Measure the voltage between the following
terminals and body ground:
— Front HO2S terminal 1A (wiring harness-
side) and body ground
— Front HO2S terminal 1B (wiring harness-
side) and body ground
— Front HO2S terminal 1C (wiring harness-
side) and body ground
• Is the voltage B+?
7 INSPECT FRONT HO2S
• Inspect the front HO2S.
(See01-40-37 HEATED OXYGEN SENSOR
(HO2S) INSPECTION[L3 WITH TC].)
• Is there any malfunction?
8 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
9 VERIFY TROUBLESHOOTING OF DTC P0132
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Perform the HO2S heater, HO2S, and TWC
Repair Verification Drive Mode.
(See01-02-10 OBD-II DRIVE MODE[L3 WITH
TC].)
• Is the PENDING CODE for this DTC present?
10 VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
(See01-02-10 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
End Of Sie
01-02–80
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Go to the appropriate DTC troubleshooting procedures.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No Go to the next step.
Yes Go to the next step.
No Go to troubleshooting procedures for the DTC on the
FREEZE FRAME DATA.
(See01-02-13 DTC TABLE[L3 WITH TC].)
Yes Repair or replace the terminal, then go to Step 9.
No Go to the next step.
Yes Repair or replace the wiring harness for a possible short to
the power supply, then go to Step 9.
No Go to the next step.
Yes Replace the front HO2S, then go to Step 9.
(See01-15-2 EXHAUST SYSTEM REMOVAL/
INSTALLATION[L3 WITH TC].)
No Go to the next step.
Yes Repair or replace the terminal, then go to the next step.
No Go to the next step.
Yes Replace the PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No DTC troubleshooting completed.
ACTION