Mazda CX-7 2007 Workshop Manual page 110

STEP
5 INSPECT ECT SENSOR SIGNAL CIRCUIT FOR
SHORT TO POWER
• Turn the ignition switch to the ON position
(Engine off).
• Measure the voltage between ECT sensor
terminal A (wiring harness-side) and body
ground.
• Is the voltage B+?
6 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion.)
• Is there any malfunction?
7 INSPECT ECT SENSOR SIGNAL CIRCUIT FOR
OPEN CIRCUIT
• Inspect the continuity between ECT sensor
terminal A (wiring harness-side) and PCM
terminal 2AH.
• Is there continuity?
8 INSPECT ECT SENSOR GROUND CIRCUIT
FOR OPEN CIRCUIT
• Inspect for continuity between ECT sensor
terminal B (wiring harness-side) and PCM
terminal 2AY.
• Is there continuity?
9 VERIFY TROUBLESHOOTING OF DTC P0118
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Start the engine.
• Is the same DTC present?
10 VERIFY AFTER REPAIR PROCEDURE
• Perform "AFTER REPAIR PROCEDURE".
(See01-02-10 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
End Of Sie
DTC P0122[L3 WITH TC]
DTC P0122 TP sensor No.1 circuit low input
• If the PCM detects that the TP sensor No.1 voltage is below 0.2 V after the ignition switch is turned to the
ON position, the PCM determines that TP circuit has a malfunction.
Diagnostic support note
DETECTION
• This is a continuous monitor (CCM).
CONDITION
• MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in the PCM memory.
• TP sensor malfunction
• Connector or terminal malfunction
POSSIBLE
• Short to ground between throttle body terminal A and PCM terminal 2AK
CAUSE
• Open circuit between throttle body terminal B and PCM terminal 2AO
01-02–68
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Repair or replace the wiring harness for a short to power
supply, then go to Step 9.
No Go to the next step.
Yes Repair or replace the terminal, then go to Step 9.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
then go to Step 9.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
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 troubleshooting.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No Troubleshooting completed.
ACTION
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