Mazda CX-9 Grand Touring 2009 Manual page 1396

If P0506, P0507 are displayed, perform DTC inspection.
(See DTC TABLE [MZI-3.7] .)
4. Access the RPM PID.
NOTE:
5. Verify that the engine speed is within the specification under each load condition.
If load condition is not as specified, inspect the following:
A/C switch and related wiring harness
(See FRONT CLIMATE CONTROL UNIT INSPECTION .)
Fan switch and related wiring harness
(See FRONT CLIMATE CONTROL UNIT INSPECTION .)
Throttle position (TP) sweep inspection
1. Connect the M-MDS to the DLC-2.
2. Turn the ignition switch to the ON position.
3. Verify that none of the following DTC are displayed:
P0122, P0123, P0222, P0223, P2101, P2107, P2112, P2122, P2123, P2127, P2128, P2135
If any one DTC is displayed, perform DTC inspection.
4. Access TP1, TP2 PID.
5. Verify that the PID reading is within the CTP value. (See PCM INSPECTION [MZI-3.7] .)
If the PID reading is out of range, perform the following:
Remove the air duct from the throttle valve body.
Verify that the throttle valve opens when the accelerator pedal is depressed.
6. Gradually depress the throttle pedal and verify that the PID reading increases accordingly.
If the PID reading drops momentarily, inspect the following:
Throttle position sensor
7. Fully depress the throttle pedal and verify that the PID reading is within WOT value. (See PCM
INSPECTION [MZI-3.7] .)
If the PID reading is out of range, perform the followings:
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Excludes temporary idle speed drop just after the loads are turned
on.
If the throttle valve opens, inspect the throttle position sensor and related wiring
harness.
If the throttle valve does not open, inspect the throttle actuator control motor and
related wiring harness.