Code No. P0705:
Malfunction of Inhibitor Switch
DIAGNOSTIC FUNCTION
CVT-ECU monitors the signal from the inhibitor switch, and determines if the abnormal
input is present or not.
JUDGEMENT CRITERIA
- CVT-ECU does not detects the inhibitor switch input signal when the vehicle
speed is 3 km/h or more for 10 seconds continuously.
- CVT-ECU detects the multiple inputs from the inhibitor switch for 2 seconds.
PROBABLE CAUSES
- Malfunction of the inhibitor switch
- Improper adjustment of transmission control cable
- Damaged wiring harness and connectors
- Malfunction of CVT-ECU
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STEP 1. Voltage measurement at inhibitor switch connector
(terminal No. 3)
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(1)Disconnect the inhibitor switch connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Measure the voltage between the inhibitor switch connector (terminal No. 3) and
body earth.
OK: 10 V or more
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Q.
Is the check result normal?
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 Go to Step 2.
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NO : Repair the connector(s) or the wiring harness (power supply line between the inhibitor
switch connector terminal No. 3 and the ETACS-ECU connector).
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STEP 2. Check for open circuit or short to earth in INHP, INHR, INHN
INHD and INHL line between the inhibitor switch connector and the CVT-ECU connector
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Q.
Is the check result normal?
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Go to Step 3.
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 Repair the connector(s) or the wiring harness.
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STEP 3. Inhibitor switch and control cable adjustment
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Refer to  .
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Q.
Is the check result normal?
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Go to Step 4.
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Adjust the inhibitor switch and the control cable.
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STEP 4. Inhibitor switch continuity check
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Refer to .
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Q.
Is the check result normal?
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Go to Step 5.
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Replace the inhibitor switch (Refer to .).
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STEP 5. Voltage measurement at CVT-ECU connector (INHP, INHR, INHN
and INHD terminal)
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(1)Connect the inhibitor switch connector.
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(2)Disconnect the CVT-ECU connector, and measure at the wiring harness side.
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(3)Turn the ignition switch to the "ON" position.
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(4)Measure the voltage at each terminal when the selector lever is moved to each range.
- At P range: Between the CVT-ECU connector (INHP terminal) and body earth
- At R range: Between the CVT-ECU connector (INHR terminal) and body earth
- At N range: Between the CVT-ECU connector (INHN terminal) and body earth
- At D range: Between the CVT-ECU connector (INHD terminal) and body earth
- At L range: Between the CVT-ECU connector (INHL terminal) and body earth
OK: 10 V or more
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Q.
Is the check result normal?
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Go to Step 6.
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Repair the connector(s) or the wiring harness.
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STEP 6. Symptom recheck after erasing diagnosis code
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Q.
Is the diagnosis code set?
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Replace the CVT-ECU.
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