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

DIAGNOSIS PROCEDURE

STEP 1. Measure the voltage at A/T-ECU connector.
(1)Disconnect the connector, and measure the voltage between terminal A line and body earth at the wiring harness side.
(2)Turn the ignition switch to the "ON" position.
OK [Selector lever position (P, R)]: System voltage
(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
(4)Measure the voltage between terminal C line and body earth at the wiring harness side.
OK [Selector lever position (D)]: System voltage
(5)Measure the voltage between terminal PA line and body earth at the wiring harness side.
OK [Selector lever position (P, N)]: System voltage

Q. Is the check result normal?
Go to Step 4.
Go to Step 2.

STEP 2. Check the inhibitor switch.
Refer to .

Q. Is the check result normal?
Go to Step 3.
Replace the inhibitor switch.

STEP 3. Check for open circuit and short circuit in A, B, C, PA line between inhibitor switch connector and A/T-ECU connector.

Q. Is the check result normal?
Go to Step 4.
Repair the connector(s) or the wiring harness.

STEP 4. Check whether the diagnosis code is set again.

  • Ignition switch: "LOCK"(OFF) → "ON"
  • Check again if the diagnosis code is set.

Q. Is diagnosis code No.P0708 set?
Replace the A/T-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).