DTC B1C53:13 [START STOP UNIT]

id0902p6021000

Description

Windshield wiper switch circuit malfunction

Detection condition

•  Start stop unit detects an open circuit, short to ground, or short to power supply in the windshield wiper switch circuit for 5 s or more with the ignition switched ON (engine off or on).

Fail-safe function

Not applicable

Possible cause

•  Start stop unit configuration error

•  The installations of the light switch and the wiper and washer switch are reversed.

•  Windshield wiper switch malfunction

•  Start stop unit malfunction

System wiring diagram

Not applicable

Description	Windshield wiper switch circuit malfunction
Detection condition	• Start stop unit detects an open circuit, short to ground, or short to power supply in the windshield wiper switch circuit for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe function	Not applicable
Possible cause	• Start stop unit configuration error • The installations of the light switch and the wiper and washer switch are reversed. • Windshield wiper switch malfunction • Start stop unit malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	PERFORM START STOP UNIT CONFIGURATION (USING AS-BUILT DATA) • Using the M-MDS, perform the start stop unit configuration (using As-Built data). (See START STOP UNIT CONFIGURATION (USING AS-BUILT DATA).) • Clear the DTC for the start stop unit using the M-MDS. (See CLEARING DTC [START STOP UNIT].) • Switch the INT volume switch to each step at 5 s intervals. • Retrieve the start stop unit DTCs using the M-MDS. (See DTC INSPECTION [START STOP UNIT].) • Is the same DTC displayed?	Yes	Using the M-MDS, perform the start stop unit configuration (using As-Built data) again, then go to the next step. (See START STOP UNIT CONFIGURATION (USING AS-BUILT DATA).)
1		No	Go to Step 5.
2	VERIFY IF INSTALLATIONS OF LIGHT SWITCH AND WIPER AND WASHER SWITCH ARE REVERSED • Verify the installation condition of the light switch and the wiper and washer switch. • Are the light switch and the wiper and washer switch installed correctly?	Yes	Go to the next step.
2		No	Install the light switch and the wiper and washer switch properly, then go to Step 4. (See LIGHT SWITCH REMOVAL/INSTALLATION.) (See WIPER AND WASHER SWITCH REMOVAL/INSTALLATION.)
3	INSPECT WINDHIELD WIPER SWITCH • Inspect the windshield wiper switch. (See WIPER AND WASHER SWITCH INSPECTION.) • Is the windshield wiper switch normal?	Yes	Go to the next step.
3		No	Replace the windshield wiper switch, then go to the next step. (See WIPER AND WASHER SWITCH REMOVAL/INSTALLATION.)
4	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear the DTC for the start stop unit using the M-MDS. (See CLEARING DTC [START STOP UNIT].) • Switch the INT volume switch to each step at 5 s intervals. • Perform the start stop unit DTC inspection 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.
4		No	Go to the next step.
5	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [START STOP UNIT].)
5		No	DTC troubleshooting completed.