DTC B1C45:12 [BCM]

id0902f5390300

Description

• Autostop switch circuit malfunction

Detection Condition

• Short to power supply in wiring harness between windshield wiper motor and BCM.

Possible Causes

• Windshield wiper motor connector or terminals malfunction

• Windshield wiper motor malfunction

• BCM connector or terminals malfunction

• Short to power supply in wiring harness between the following terminals:

― Windshield wiper motor terminal E—BCM terminal 7J (L.H.D.)

― Windshield wiper motor terminal A—BCM terminal 7J (R.H.D.)

• BCM malfunction

System Wiring Diagram

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Diagnostic Procedure

Step

Inspection

Action

1

PERFORM DTC INSPECTION

•  Clear the DTCs using the M-MDS.
(See CLEARING DTC [BCM].)

•  Perform the BCM DTC inspection using the M-MDS.
(See DTC INSPECTION [BCM].)

•  Is the DTC B1C45:12 present?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

INSPECT WINDSHIELD WIPER MOTOR CONNECTOR CONDITION

•  Switch the ignition to off.

•  Disconnect the negative battery cable.

•  Disconnect the windshield wiper motor connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is there any malfunction?

Yes

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

No

Go to the next step.

3

INSPECT WINDSHIELD WIPER MOTOR

•  Inspect the windshield wiper motor.
(See WINDSHIELD WIPER MOTOR INSPECTION.)

•  Is there any malfunction?

Yes

Replace the windshield wiper motor, then go to Step 6.

(See WINDSHIELD WIPER MOTOR REMOVAL/INSTALLATION.)

No

Go to the next step.

4

INSPECT BCM CONNECTOR CONDITION

•  Disconnect the BCM connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is there any malfunction?

Yes

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

No

Go to the next step.

5

INSPECT AUTOSTOP SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY

•  Windshield wiper motor and BCM connectors are disconnected.

•  Reconnect the negative battery cable.

•  Switch the ignition to ON.

•  Measure the voltage at the following terminal (wiring harness-side):

―  Windshield wiper motor terminal E (L.H.D.)

―  Windshield wiper motor terminal A (R.H.D.)

•  Can the voltage be measured?

Yes

Repair or replace the wiring harness for a possible short to power supply, then go to the next step.

No

Go to the next step.

6

VERIFY TROUBLESHOOTING COMPLETED

•  Make sure to reconnect all disconnected connectors.

•  Reconnect the negative battery cable.

•  Clear the DTCs using the M-MDS.
(See CLEARING DTC [BCM].)

•  Perform the BCM DTC inspection using the M-MDS.
(See DTC INSPECTION [BCM].)

•  Is the DTC B1C45:12 present?

Yes

Repeat the inspection from Step 1.

•  If the malfunction recurs, replace the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

7

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [BCM].)

No

DTC troubleshooting completed.

Step	Inspection		Action
1	PERFORM DTC INSPECTION • Clear the DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM].) • Is the DTC B1C45:12 present?	Yes	Go to the next step.
1		No	DTC troubleshooting completed.
2	INSPECT WINDSHIELD WIPER MOTOR CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the windshield wiper motor connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 6.
2		No	Go to the next step.
3	INSPECT WINDSHIELD WIPER MOTOR • Inspect the windshield wiper motor. (See WINDSHIELD WIPER MOTOR INSPECTION.) • Is there any malfunction?	Yes	Replace the windshield wiper motor, then go to Step 6. (See WINDSHIELD WIPER MOTOR REMOVAL/INSTALLATION.)
3		No	Go to the next step.
4	INSPECT BCM CONNECTOR CONDITION • Disconnect the BCM connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 6.
4		No	Go to the next step.
5	INSPECT AUTOSTOP SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY • Windshield wiper motor and BCM connectors are disconnected. • Reconnect the negative battery cable. • Switch the ignition to ON. • Measure the voltage at the following terminal (wiring harness-side): ― Windshield wiper motor terminal E (L.H.D.) ― Windshield wiper motor terminal A (R.H.D.) • Can the voltage be measured?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to the next step.
5		No	Go to the next step.
6	VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. • Clear the DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM].) • Is the DTC B1C45:12 present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.) Go to the next step.
6		No	Go to the next step.
7	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [BCM].)
7		No	DTC troubleshooting completed.