Diagnostic Procedure
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STEP
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INSPECTION
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RESULTS
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ACTION
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1
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Does the A/C compressor disengage when the A/C switch is turned off?
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Yes
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Go to the next step.
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No
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Go to symptom troubleshooting "NO.24 A/C ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY".
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2
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Perform self-test function using the WDS or equivalent.
Turn the engine switch to the ON position.
Retrieve any DTC.
Is DTC displayed?
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Yes
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DTC is displayed:
Go to the applicable DTC inspection.
Communication error message is displayed:
Inspect for the following:
• Open circuit between PCM control relay and PCM terminal 53 or 79
• Open circuit PCM control relay and PCM terminal 69
• PCM control relay stuck open.
• Open or poor GND circuit (PCM terminal 65, 85, 103 or 104)
• Poor connection vehicle body GND
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No
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No DTC is displayed:
Inspect adjustment of the accelerator pedal position sensor.
If the accelerator pedal position sensor adjustment is not correct, adjust the accelerator pedal position sensor.
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3
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Verify test results.
• If normal, return to diagnostic index to service any additional symptoms.
• If malfunction remains, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
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