Mazda CX-7 2007 Workshop Manual page 257

STEP
4 INSPECT APP SENSOR CONNECTOR FOR
POOR CONNECTION
• Disconnect the APP sensor connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
5 INSPECT APP SENSOR
• Perform the APP sensor inspection.
(See01-40-33 ACCELERATOR PEDAL
POSITION (APP) SENSOR INSPECTION[L3
WITH TC].)
• Is the APP sensor normal?
6 INSPECT APP2 SIGNAL CIRCUIT FOR SHORT
TO POWER SUPPLY
• Turn ignition switch to the ON position (Engine
off).
• Measure the voltage between APP sensor
terminal C (harness-side) and body ground.
• Is the voltage above 4.5 V?
7 VERIFY APP SENSOR GROUND CIRCUIT FOR
OPEN CIRCUIT
• Disconnect the PCM connector.
• Inspect the continuity between APP sensor
terminal B (harness-side) and PCM terminal
1AV (harness-side).
• Is there continuity?
8 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
9 VERIFY APP SIGNAL CIRCUIT FOR SHORT TO
POWER SUPPLY CIRCUIT
• Inspect the continuity between throttle body
terminals A and C (harness-side).
• Is there continuity?
10 VERIFY TROUBLESHOOTING OF DTC P2128
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Turn ignition switch to the ON position (Engine
off).
• Clear the DTC from the PCM memory using
the M-MDS.
• Start the engine and warm it up completely.
• Is the same DTC present?
11 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
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Repair or replace the suspected terminal, then go to Step
10.
No Go to the next step.
Yes Go to the next step.
No Replace the APP sensor, then go to Step 10.
Yes Repair or replace for a short to power supply. Then, go to
Step 10.
No Go to the next step.
Yes Repair or replace for an open circuit between APP sensor
terminal C (harness-side) and PCM connector terminal
1AC (harness-side). Then, go to Step 10.
No Go to the next step.
Yes Repair the terminal, then go to Step 10.
No Go to the next step.
Yes Repair or replace the suspected wiring harness, 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
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