Mazda CX-7 2007 Workshop Manual page 270

STEP
12 INSPECT VARIABLE VALVE TIMING CONTROL
SYSTEM OPERATION
• Inspect the variable valve timing control system
operation.
(See01-03-78 ENGINE CONTROL SYSTEM
OPERATION INSPECTION[L3 WITH TC].)
• Does the variable valve timing control system
work properly?
13 INSPECT IF EGR VALVE IS STUCK OPEN
• Remove the EGR valve.
• Does the EGR valve stuck open?
14 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].)
15 IDENTIFY CAUSE BY FUEL PRESSURE
SENSOR OR HIGH PRESSURE FUEL PUMP
• Is the vehicle accelerate performance
normally?
16 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?
17 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].)
18 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?
19 VERIFY TROUBLESHOOTING OF DTC P2188
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?
20 VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
End Of Sie
01-02–228
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Go to the next step.
No Repair or replace the malfunctioning part according to
inspection results, then go to Step 18.
Yes Clean or replace the EGR valve, then go to Step 19.
No Go to the next step.
Yes Go to Step 18.
No Go to the next step.
Yes Go to the next step.
No Go to Step 17.
Yes Go to Step 19.
No Replace the fuel delivery pipe, then go to Step 19.
Yes Go to Step 19.
No Go to the next step.
Yes Go to the next step.
No Inspect for following:
• Fuel line restriction
• Fuel filter clogging
If okay replace the fuel pump. Then 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