DTC B1D39:11 [ELECTRICAL SUPPLY UNIT (ESU)]

id0902ff062900

Description

Rear wiper motor circuit malfunction

Detection condition

•  Electrical supply unit (ESU) detects a short to ground in the rear wiper motor circuit with the ignition switched ON (engine off or on).

Fail-safe

Not applicable

Possible cause

•  Rear wiper motor connector or terminal malfunction

•  Rear wiper motor malfunction

•  Electrical supply unit (ESU) connector or terminal malfunction

•  Short to ground in wiring harness between rear wiper motor terminal A and electrical supply unit (ESU) terminal 2M

•  Electrical supply unit (ESU) malfunction

Description	Rear wiper motor circuit malfunction
Detection condition	• Electrical supply unit (ESU) detects a short to ground in the rear wiper motor circuit with the ignition switched ON (engine off or on).
Fail-safe	Not applicable
Possible cause	• Rear wiper motor connector or terminal malfunction • Rear wiper motor malfunction • Electrical supply unit (ESU) connector or terminal malfunction • Short to ground in wiring harness between rear wiper motor terminal A and electrical supply unit (ESU) terminal 2M • Electrical supply unit (ESU) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT REAR WIPER MOTOR CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) • Disconnect the rear wiper motor 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.
1		No	Repair or replace the connector, then go to Step 5.
2	INSPECT REAR WIPER MOTOR • Inspect the rear wiper motor. (See REAR WIPER MOTOR INSPECTION.) • Is the rear wiper motor normal?	Yes	Go to the next step.
2		No	Replace the rear wiper motor, then go to Step 5. (See REAR WIPER MOTOR REMOVAL/INSTALLATION.)
3	INSPECT ELECTRICAL SUPPLY UNIT (ESU) CONNECTOR CONDITION • Disconnect the electrical supply unit (ESU) 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.
3		No	Repair or replace the connector, then go to Step 5.
4	INSPECT REAR WIPER MOTOR CIRCUIT FOR SHORT TO GROUND • Verify that the rear wiper motor and electrical supply unit (ESU) connectors are disconnected. • Inspect for continuity between rear wiper motor terminal A (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 rear wiper motor terminal A and electrical supply unit (ESU) terminal 2M. 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 the next step.
4		No	Go to the next step.
5	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Always reconnect all disconnected connectors. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) • Clear the DTC for the electrical supply unit (ESU) using the M-MDS. (See CLEARING DTC [ELECTRICAL SUPPLY UNIT (ESU)].) • Retrieve the electrical supply unit (ESU) DTCs using the M-MDS. (See DTC INSPECTION [ELECTRICAL SUPPLY UNIT (ESU)].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the electrical supply unit (ESU). (See ELECTRICAL SUPPLY UNIT (ESU) REMOVAL/INSTALLATION.) Go to the next step.
5		No	Go to the next step.
6	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 [ELECTRICAL SUPPLY UNIT (ESU)].)
6		No	DTC troubleshooting completed.