Description

Request switch (LF) circuit malfunction

Detection condition

• Start stop unit detected any of the following conditions at a vehicle speed of 5 km/h {3 mph} or more.

• The request switch (LF) is continuously ON for 2 min or more.

• The request switch (LF) was ON 7 times.

Fail-safe

Not applicable

Possible cause

• Outer Handle (LH) connector or terminal malfunction

• LF control unit connector or terminal malfunction

• Short to ground in wiring harness between LF control unit terminal C and outer handle (LH) terminal D

• Request switch (LF) malfunction

• LF control unit malfunction

• Start stop unit malfunction

Step

Inspection

Action

1

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the outer handle (LH) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 6.

2

• Disconnect the LF control unit connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 6.

3

• Verify that the LF control unit and outer handle (LH) connectors are disconnected.

• Inspect for continuity between outer handle (LH) terminal D (wiring harness-side) and body ground.

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between LF control unit terminal C and outer handle (LH) terminal D.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 6.

No

Go to the next step.

4

• Inspect the request switch (LF).

  (See REQUEST SWITCH INSPECTION.)

• Is the request switch (LF) normal?

Yes

Go to the next step.

No

Replace the outer handle (LH), then go to Step 6.

(See OUTER HANDLE REMOVAL/INSTALLATION.)

5

• Inspect the LF control unit.

  (See LF CONTROL UNIT INSPECTION.)

• Is the LF control unit normal?

Yes

Go to the next step.

No

Replace the LF control unit, then go to the next step.

(See LF CONTROL UNIT REMOVAL/INSTALLATION.)

6

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the DTC for the start stop unit using the M-MDS.

  (See CLEARING DTC [START STOP UNIT].)

• Drive the vehicle at 5 km/h {3 mph} or more for 2 min or more.

• Retrieve the start stop unit DTCs using the M-MDS.

  (See DTC INSPECTION [START STOP UNIT].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the start stop unit.

  (See START STOP UNIT REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

7

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [START STOP UNIT].)

No

DTC troubleshooting completed.