Mazda CX-7 2007 Workshop Manual page 112

STEP
5 INSPECT POWER SUPPLY CIRCUIT VOLTAGE
AT THROTTLE BODY CONNECTOR
Note
• If DTC P0107 and P2228 are also retrieved
with P0122, go to CONSTANT VOLTAGE
troubleshooting procedure.
• Turn ignition switch to the ON position (Engine
off).
• Measure the voltage at throttle body terminal B
(harness-side).
• Is the voltage within 4.5— 5.5 V?
6 VERIFY TP1 SIGNAL CIRCUIT FOR OPEN
CIRCUIT
• Turn the ignition switch off.
• Inspect for continuity between throttle body
terminal A (harness-side) and PCM terminal
2AK (harness-side).
• Is there continuity?
7 VERIFY TP1 SIGNAL CIRCUIT FOR SHORT TO
GROUND
• Inspect for continuity between throttle body
terminal A (harness-side) and body ground.
• Is there continuity?
8 VERIFY TROUBLESHOOTING OF DTC P0122
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 same DTC present?
9 VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
(See01-02-10 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
End Of Sie
DTC P0123[L3 WITH TC]
DTC P0123 TP sensor No.1 circuit high input
• If the PCM detects that the TP sensor No.1 voltage is above 4.9 V after ignition switch to the ON position,
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
• Open circuit between throttle body terminal B and PCM terminal 2AO
CAUSE
• Open circuit between throttle body terminal D and PCM terminal 2AP
• Short to the constant voltage supply circuit between throttle body terminal A and PCM terminal 2AK
01-02–70
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Go to the next step.
No Repair or replace for an open circuit between throttle body
connector terminal B (harness-side) and PCM connector
terminal 2AO (harness-side).
Then, then go to Step 8.
Yes Go to the next step.
No Repair or replace the suspected harness, then go to Step
8.
Yes Repair or replace the suspected wiring harness, then go to
the next step.
No Go to the next step.
Yes Replace 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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