DTC B1013:23 [BCM]

id0902f5340100

Description

• Rear window defroster switch circuit malfunction

Detection Condition

• Rear window defroster switch is in a pressed condition for 2 min or more (rear defroster switch stuck).

Possible Causes

• Climate control unit connector or terminals malfunction

• Rear window defroster switch malfunction

• BCM connector or terminals malfunction

• Short to ground in wiring harness between the following terminals:

― Vehicles with full-auto air conditioner

• Climate control unit terminal V and BCM terminal 6D

― Vehicles with manual air conditioner

• Climate control unit terminal I and BCM terminal 6D

• Climate control unit malfunction

• BCM malfunction

System Wiring Diagram

am2zzw00006124

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY BCM DTCs

•  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 same DTC present?

Yes

Go to the next step.

No

Go to Step 7.

2

INSPECT CLIMATE CONTROL UNIT CONNECTOR AND TERMINALS

•  Turn the ignition switch to the LOCK position.

•  Disconnect the negative battery cable.

•  Disconnect the climate control unit 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 BCM CONNECTOR AND TERMINALS

•  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.

4

INSPECT REAR WINDOW DEFROSTER SWITCH CIRCUIT FOR SHORT TO GROUND

•  Verify that the climate control unit and BCM connectors are disconnected.

•  Inspect for continuity between the following terminal (wiring harness-side) and body ground:

―  Vehicles with full-auto air conditioner

•  Climate control unit terminal V

―  Vehicles with manual air conditioner

•  Climate control unit terminal I

Yes

Repair or replace the wiring harness for a possible short to ground, then go to Step 6.

No

Go to the next step.

5

INSPECT CLIMATE CONTROL UNIT

•  Make sure to reconnect all disconnected connectors.

•  Reconnect the negative battery cable.

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

―  Vehicles with full-auto air conditioner

•  Climate control unit terminal V

―  Vehicles with manual air conditioner

•  Climate control unit terminal I

•  Is the voltage normal?
(See CLIMATE CONTROL UNIT INSPECTION [FULL-AUTO AIR CONDITIONER].)

(See CLIMATE CONTROL UNIT INSPECTION [MANUAL AIR CONDITIONER].)

Yes

Go to the next step.

No

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

(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)

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 same DTC 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	VERIFY BCM DTCs • 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 same DTC present?	Yes	Go to the next step.
1		No	Go to Step 7.
2	INSPECT CLIMATE CONTROL UNIT CONNECTOR AND TERMINALS • Turn the ignition switch to the LOCK position. • Disconnect the negative battery cable. • Disconnect the climate control unit 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 BCM CONNECTOR AND TERMINALS • 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.
3		No	Go to the next step.
4	INSPECT REAR WINDOW DEFROSTER SWITCH CIRCUIT FOR SHORT TO GROUND • Verify that the climate control unit and BCM connectors are disconnected. • Inspect for continuity between the following terminal (wiring harness-side) and body ground: ― Vehicles with full-auto air conditioner • Climate control unit terminal V ― Vehicles with manual air conditioner • Climate control unit terminal I	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 6.
4		No	Go to the next step.
5	INSPECT CLIMATE CONTROL UNIT • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. • Measure the voltage at the following terminal (wiring harness-side): ― Vehicles with full-auto air conditioner • Climate control unit terminal V ― Vehicles with manual air conditioner • Climate control unit terminal I • Is the voltage normal? (See CLIMATE CONTROL UNIT INSPECTION [FULL-AUTO AIR CONDITIONER].) (See CLIMATE CONTROL UNIT INSPECTION [MANUAL AIR CONDITIONER].)	Yes	Go to the next step.
5		No	Replace the climate control unit, then go to the next step. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)
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 same DTC 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.