Mazda CX-7 2007 Workshop Manual page 238

STEP
8 VERIFY CURRENT INPUT SIGNAL STATUS OF
FRONT HO2S
• Connect the M-MDS to the DLC-2.
• Start the engine and warm it up completely.
• Access the O2S11 PID.
• Read the O2S11 PID under following
accelerator pedal condition (in NEUTRAL).
— –0.1— 0.1A when idle
— More than 0.25 mA just after release of
accelerator pedal (lean condition).
• Is the PID normal?
9 INSPECT FUEL PRESSURE (HIGH-SIDE)
• Access and monitor FUEL_PRES PID.
• Is the FUEL_PRES PID value within the
specified?
(See01-40-6 PCM INSPECTION[L3 WITH
TC].)
10 IDENTIFY CAUSE BY FUEL PRESSURE
SENSOR OR HIGH PRESSURE FUEL PUMP
• Is the vehicle accelerate performance
normally?
11 INSPECT FUEL PRESSURE SENSOR
• Inspect the fuel pressure sensor.
(See01-40-35 FUEL PRESSURE SENSOR
INSPECTION[L3 WITH TC].)
• Is the fuel pressure sensor normal?
12 INSPECT HIGH PRESSURE FUEL PUMP
• Replace the high pressure fuel pump.
• Monitor FUEL_PRES PID.
• Is the FUEL_PRES PID value within the
specified?
(See01-40-6 PCM INSPECTION[L3 WITH TC].)
13 INSPECT FUEL PRESSURE (LOW-SIDE)
• Connect the fuel pressure gauge between fuel
pump and high pressure fuel pump.
• Measure the low side fuel pressure.
(See01-14-5 FUEL LINE PRESSURE
INSPECTION[L3 WITH TC].)
• Is the low side fuel pressure within the
specified?
14 INSPECT LONG TERM FUEL TRIM
• Connect the M-MDS to the DLC_2.
• Access LONGFT1 PID.
• Compare the LONGFT1 PID with recorded
FREEZE FRAME DATA at Step 1.
• Is the LONGFT1 PID above FREEZE FRAME
DATA?
15 VERIFY TROUBLESHOOTING OF DTC P2097
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Perform the PCM Adaptive Memory Produce
Drive Mode.
(See01-02-10 OBD-II DRIVE MODE[L3 WITH
TC].)
• Is the PENDING CODE for this DTC present?
16 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
WM: DTC P21XX
01-02–196
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Go to the next step.
No Visually inspect for exhaust gas leakage between the
exhaust manifold and front HO2S.
• If there is no leakage, replace front HO2S.
(See01-15-2 EXHAUST SYSTEM REMOVAL/
INSTALLATION[L3 WITH TC].)
Then go to Step 15.
Yes Go to Step 14.
No Go to the next step.
Yes Go to the next step.
No Go to Step 12.
Yes Go to Step 14.
No Replace the fuel delivery pipe, then go to Step 15.
Yes Go to Step 15.
No Go to the next step.
Yes Go to the next step.
No Inspect for following:
• Fuel line restriction
• Fuel filter clogging
If normal replace the fuel pump. Then go to Step 15.
Yes Inspect the purge valve.
(See01-16-9 PURGE SOLENOID VALVE INSPECTION[L3
WITH TC].)
• If there is any malfunction, replace the purge valve.
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 Troubleshooting completed.
ACTION