Code No.P0708: Inhibitor Switch System (Short Circuit)
OPERATION
The inhibitor switch detects the selector lever position (P, R, N, D) which the driver has selected, and sends the information to the A/T-ECU.
DIAGNOSIS CODE SET CONDITIONS
When a status continues for 5 seconds with which more than two signals from the inhibitor switch are simultaneously turned ON, code No.P0708 is set.
PROBABLE CAUSES
- Malfunction of the inhibitor switch
- Damaged harness wires and connectors
- Malfunction of the A/T-ECU
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STEP 1. Measure the voltage at A/T-ECU connector.
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(1)Disconnect the connector, and measure the voltage between terminal A line and body earth at the wiring harness side.
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(2)Turn the ignition switch to the "ON" position. OK [Selector lever position (P, R)]: System voltage
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(3)Measure the voltage between terminal B line and body earth at the wiring harness side. OK [Selector lever position (R, N, D)]: System voltage
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(4)Measure the voltage between terminal C line and body earth at the wiring harness side. OK [Selector lever position (D)]: System voltage
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(5)Measure the voltage between terminal PA line and body earth at the wiring harness side. OK [Selector lever position (P, N)]: System voltage
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Q.
Is the check result normal?
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Go to Step 4.
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Go to Step 2.
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STEP 2. Check the inhibitor switch.
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Refer to .
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Q.
Is the check result normal?
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Go to Step 3.
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Replace the inhibitor switch.
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STEP 3. Check for open circuit and short circuit in A, B, C, PA line between inhibitor switch connector and A/T-ECU connector.
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Q.
Is the check result normal?
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Go to Step 4.
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Repair the connector(s) or the wiring harness.
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STEP 4. Check whether the diagnosis code is set again.
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- Ignition switch: "LOCK"(OFF) → "ON"
- Check again if the diagnosis code is set.
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Q.
Is diagnosis code No.P0708 set?
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Replace the A/T-ECU.
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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