Mazda CX-7 2007 Workshop Manual page 224

Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins and/or on-
line repair information availability.
• Is any related repair information available?
3 CLASSIFY INTERMITTENT CONCERN OR
CONTINUOUS CONCERN
• Clear the DTC from the PCM memory using
the M-MDS.
• Drive the vehicle under following conditions:
— Engine coolant temperature is above 63 °C
{145 °F}.
— Engine speed: below 3,750 rpm
— Throttle opening angle is as follows:
• Engine speed below 1,500 rpm: above
35%
• Engine speed between 1,500— 2,500
rpm: between 25— 35%
• Engine speed above 2,500: below 25%
• Is the PENDING CODE for this DTC present?
4 VERIFY STORED OTHER DTCS
• Verify stored DTCs using M-MDS or
equipment.
• Is other DTC present except P0117, P0118,
P0121, P0122, P0123 and/or P0335?
5 INSPECT VARIABLE SWIRL SHUTTER VALVE
ACTUATOR
• Perform the "Variable Swirl System Operation
Inspection".
(See01-03-78 ENGINE CONTROL SYSTEM
OPERATION INSPECTION[L3 WITH TC].)
• Is the variable swirl shutter valve actuator
normal?
6 INSPECT VARIABLE SWIRL SOLENOID VALVE
• Perform the "variable swirl solenoid valve
airflow inspection".
(See01-13-13 VARIABLE SWIRL SOLENOID
VALVE INSPECTION[L3 WITH TC].)
• Is the variable swirl solenoid valve normal?
7 INSPECT VARIABLE SWIRL SOLENOID VALVE
OR VARIABLE SWIRL SHUTTER VALVE
SWITCH CONNECTOR FOR POOR
CONNECTION
• Turn the ignition switch to off.
• Disconnect the variable swirl solenoid valve
connector and the variable swirl shutter valve
switch connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
8 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Inspect for poor connection at the PCM
terminals (such as damaged, pulled-out
terminals, corrosion).
• Is there any malfunction?
01-02–182
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Go to the next step.
No Record FREEZE FRAME DATA on the repair order, then go
to the next step.
Yes Perform the repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
Yes Go to the next step.
No Intermittent concern exists. Go to INTERMITTENT
CONCERN TROUBLESHOOTING procedure.
(See01-03-76 INTERMITTENT CONCERN
TROUBLESHOOTING[L3 WITH TC].)
Yes Go to appropriate DTC troubleshooting procedures.
No Go to the next step.
Yes Go to the next step.
No Replace the variable swirl shutter valve actuator, then go to
Step 10.
Yes Go to the next step.
No Replace the variable swirl solenoid valve, then go to Step
10.
Yes Repair the terminal, then go to Step 10.
No Go to the next step.
Yes Repair terminal, then go to Step 10.
No Go to the next step.
ACTION