DTC B1047:11 [BCM]

id0902f5414600

Malfunction Location

• Rear fog light switch circuit malfunction

Detection Condition

• Short to ground detected in rear fog light switch circuit with the rear fog light switch off

Possible Causes

• Short circuit to ground in wiring harness between auto light/wiper control module connector terminal J and rear fog light switch connector terminal C

• Short circuit to ground in wiring harness between auto light/wiper control module connector terminal I and BCM connector terminal 3F

• Rear fog light switch malfunction

• Auto light/wiper control module malfunction

• BCM malfunction

System Wiring Diagram

am6zzw00002032

Diagnostic Procedure

Step

Inspection

Action

1

PERFORM DTC INSPECTION

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

•  Perform the BCM DTC inspection using the M-MDS with the rear fog light switch off.
(See DTC INSPECTION [BCM].)

•  Is DTC B1047:11 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

INSPECT REAR FOG LIGHT SWITCH CONNECTOR CONDITION

•  Switch the ignition to off.

•  Disconnect the negative battery cable.

•  Disconnect the rear fog light switch connector.

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

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 9.

3

INSPECT REAR FOG LIGHT SWITCH

•  Inspect the rear fog light switch.
(See REAR FOG LIGHT SWITCH INSPECTION.)

•  Is the rear fog light switch normal?

Yes

Go to the next step.

No

Replace the rear fog light switch.

(See LIGHT SWITCH REMOVAL/INSTALLATION.)

After replacement, go to Step 9.

4

INSPECT AUTO LIGHT/WIPER CONTROL MODULE CONNECTOR CONDITION

•  Disconnect the auto light/wiper control module connector.

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

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 9.

5

INSPECT REAR FOG LIGHT SWITCH CIRCUIT FOR SHORT CIRCUIT TO GROUND

•  Inspect for continuity between rear fog light switch connector terminal C and body ground.

•  Is there continuity?

Yes

Repair/replace the wiring harness.

After repair procedure, go to Step 9.

No

Go to the next step.

6

INSPECT BCM CONNECTOR CONDITION

•  Disconnect the BCM connector.

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

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 9.

7

INSPECT REAR FOG LIGHT SWITCH CIRCUIT FOR SHORT CIRCUIT TO GROUND

•  Inspect for continuity between auto light/wiper control module connector terminal I and body ground.

•  Is there continuity?

Yes

Repair/replace the wiring harness.

After repair procedure, go to Step 9.

No

Go to the next step.

8

INSPECT AUTO LIGHT/WIPER CONTROL MODULE

•  Reconnect the auto light/wiper control module connector.

•  Reconnect the negative battery cable.

•  Measure the voltage at the following connector .

―  Auto light/wiper control module connector terminal I

―  Auto light/wiper control module connector terminal J
(See AUTO LIGHT/WIPER CONTROL MODULE INSPECTION.)

•  Is the voltage normal?

Yes

Go to the next step.

No

Replace the auto light/wiper control module.

(See AUTO LIGHT/WIPER CONTROL MODULE REMOVAL/INSTALLATION.)

After replacement, go to the next Step.

9

VERIFY DTC

•  Reconnect the disconnected connectors and the negative battery cable.

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

•  Perform the BCM DTC inspection using the M-MDS with the rear fog light switch off.
(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.

10

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Are there other DTCs output?

Yes

Perform the corresponding DTC inspection.

No

DTC troubleshooting completed.

Step	Inspection		Action
1	PERFORM DTC INSPECTION • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform the BCM DTC inspection using the M-MDS with the rear fog light switch off. (See DTC INSPECTION [BCM].) • Is DTC B1047:11 displayed?	Yes	Go to the next step.
1		No	DTC troubleshooting completed.
2	INSPECT REAR FOG LIGHT SWITCH CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the rear fog light switch connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is the connector normal?	Yes	Go to the next step.
2		No	Repair/replace the connector or terminal. After repair procedure, go to Step 9.
3	INSPECT REAR FOG LIGHT SWITCH • Inspect the rear fog light switch. (See REAR FOG LIGHT SWITCH INSPECTION.) • Is the rear fog light switch normal?	Yes	Go to the next step.
3		No	Replace the rear fog light switch. (See LIGHT SWITCH REMOVAL/INSTALLATION.) After replacement, go to Step 9.
4	INSPECT AUTO LIGHT/WIPER CONTROL MODULE CONNECTOR CONDITION • Disconnect the auto light/wiper control module connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is the connector normal?	Yes	Go to the next step.
4		No	Repair/replace the connector or terminal. After repair procedure, go to Step 9.
5	INSPECT REAR FOG LIGHT SWITCH CIRCUIT FOR SHORT CIRCUIT TO GROUND • Inspect for continuity between rear fog light switch connector terminal C and body ground. • Is there continuity?	Yes	Repair/replace the wiring harness. After repair procedure, go to Step 9.
5		No	Go to the next step.
6	INSPECT BCM CONNECTOR CONDITION • Disconnect the BCM connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is the connector normal?	Yes	Go to the next step.
6		No	Repair/replace the connector or terminal. After repair procedure, go to Step 9.
7	INSPECT REAR FOG LIGHT SWITCH CIRCUIT FOR SHORT CIRCUIT TO GROUND • Inspect for continuity between auto light/wiper control module connector terminal I and body ground. • Is there continuity?	Yes	Repair/replace the wiring harness. After repair procedure, go to Step 9.
7		No	Go to the next step.
8	INSPECT AUTO LIGHT/WIPER CONTROL MODULE • Reconnect the auto light/wiper control module connector. • Reconnect the negative battery cable. • Measure the voltage at the following connector . ― Auto light/wiper control module connector terminal I ― Auto light/wiper control module connector terminal J (See AUTO LIGHT/WIPER CONTROL MODULE INSPECTION.) • Is the voltage normal?	Yes	Go to the next step.
8		No	Replace the auto light/wiper control module. (See AUTO LIGHT/WIPER CONTROL MODULE REMOVAL/INSTALLATION.) After replacement, go to the next Step.
9	VERIFY DTC • Reconnect the disconnected connectors and the negative battery cable. • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform the BCM DTC inspection using the M-MDS with the rear fog light switch off. (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.
9		No	Go to the next step.
10	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are there other DTCs output?	Yes	Perform the corresponding DTC inspection.
10		No	DTC troubleshooting completed.