DTC C1137:12 [BCM]

id0902f5415400

Description

• TR switch (ATX)/Back-up light switch (MTX) circuit malfunction

Detection Condition

ATX

• Short to power supply in TR switch circuit with the selector lever not in R position.

MTX

• Short to power supply in back-up light switch circuit with the shift lever not in R position (back-up light switch off).

Possible Causes

• TR switch (ATX)/Back-up light switch (MTX) connector or terminals malfunction

• TR switch (ATX)/Back-up light switch (MTX) malfunction

• BCM connector or terminals malfunction

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

― TR switch terminal D—BCM terminal 2H (ATX)

― Back-up light switch terminal B—BCM terminal 2H (MTX)

― Back-up light (LH)/(RH) terminal A—BCM terminal 7A

• BCM malfunction

System Wiring Diagram

am6zzw00007172

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 under the following condition:
(See DTC INSPECTION [BCM].)

―  Selector lever not in R position (ATX)

―  Shift lever not in R position (back-up light switch off) (MTX)

•  Is the DTC C1137:12 present?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

INSPECT TR SWITCH (ATX)/BACK-UP LIGHT SWITCH (MTX) CONNECTOR CONDITION

•  Switch the ignition to off.

•  Disconnect the negative battery cable.

•  Disconnect the TR switch (ATX)/back-up light switch (MTX) 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 TR SWITCH (ATX)/BACK-UP LIGHT SWITCH (MTX)

•  Inspect the TR switch (ATX)/back-up light switch (MTX).
(See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL].)

(See BACK-UP LIGHT SWITCH INSPECTION.)

•  Is there any malfunction?

Yes

Replace the TR switch (ATX)/back-up light switch (MTX), then go to Step 6.

(See TRANSAXLE RANGE (TR) SWITCH REMOVAL [FS5A-EL].)

(See TRANSAXLE RANGE (TR) SWITCH INSTALLATION [FS5A-EL].)

(See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [G35M-R].)

(See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [G66M-R].)

(See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [A26M-R].)

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 TR SWITCH (ATX)/BACK-UP LIGHT SWITCH (MTX) CIRCUIT FOR SHORT TO POWER SUPPLY

•  TR switch (ATX)/back-up light switch (MTX) and BCM connectors are disconnected.

•  Reconnect the negative battery cable.

•  Switch the ignition to ON.

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

―  TR switch terminal D (ATX)

―  Back-up light switch terminal B (MTX)

―  Back-up light (LH)/(RH) terminal A

•  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 under the following condition:
(See DTC INSPECTION [BCM].)

―  Selector lever not in R position (ATX)

―  Shift lever not in R position (back-up light switch off) (MTX)

•  Is the DTC C1137:12 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 under the following condition: (See DTC INSPECTION [BCM].) ― Selector lever not in R position (ATX) ― Shift lever not in R position (back-up light switch off) (MTX) • Is the DTC C1137:12 present?	Yes	Go to the next step.
1		No	DTC troubleshooting completed.
2	INSPECT TR SWITCH (ATX)/BACK-UP LIGHT SWITCH (MTX) CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the TR switch (ATX)/back-up light switch (MTX) 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 TR SWITCH (ATX)/BACK-UP LIGHT SWITCH (MTX) • Inspect the TR switch (ATX)/back-up light switch (MTX). (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL].) (See BACK-UP LIGHT SWITCH INSPECTION.) • Is there any malfunction?	Yes	Replace the TR switch (ATX)/back-up light switch (MTX), then go to Step 6. (See TRANSAXLE RANGE (TR) SWITCH REMOVAL [FS5A-EL].) (See TRANSAXLE RANGE (TR) SWITCH INSTALLATION [FS5A-EL].) (See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [G35M-R].) (See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [G66M-R].) (See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [A26M-R].)
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 TR SWITCH (ATX)/BACK-UP LIGHT SWITCH (MTX) CIRCUIT FOR SHORT TO POWER SUPPLY • TR switch (ATX)/back-up light switch (MTX) and BCM connectors are disconnected. • Reconnect the negative battery cable. • Switch the ignition to ON. • Measure the voltage at the following terminals (wiring harness-side): ― TR switch terminal D (ATX) ― Back-up light switch terminal B (MTX) ― Back-up light (LH)/(RH) terminal A • 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 under the following condition: (See DTC INSPECTION [BCM].) ― Selector lever not in R position (ATX) ― Shift lever not in R position (back-up light switch off) (MTX) • Is the DTC C1137:12 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.