DTC C1137:12 [BCM]

id0902f5415400

Malfunction Location

• Transaxle range switch (ATX) /back-up light switch (MTX) circuit malfunction

Detection Condition

• Short to power supply in transaxle range switch (ATX) /back-up light switch (MTX) circuit with the shift lever in R position (transaxle range switch {ATX} /back-up light switch {MTX} on)

Possible Causes

ATX

• Short circuit to power supply in wiring harness between transaxle range switch connector terminal D and BCM connector terminal 2H

• Short circuit to power supply in wiring harness between back-up light connector terminal A and BCM connector terminal 7A

• Transaxle range switch malfunction

• BCM malfunction

MTX

• Short circuit to power supply in wiring harness between back-up light switch connector terminal B and BCM connector terminal 2H

• Short circuit to power supply in wiring harness between back-up light connector terminal A and BCM connector terminal 7A

• Back-up light switch malfunction

• BCM malfunction

System Wiring Diagram

am6zzw00002046

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 shift lever in R position (transaxle range switch {ATX} /back-up light switch {MTX} on).
(See DTC INSPECTION [BCM].)

•  Is DTC C1137:12 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

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

•  Switch the ignition to off.

•  Disconnect the negative battery cable.

•  Disconnect the transaxle range switch (ATX) /back-up light switch (MTX) 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 6.

3

INSPECT TRANSAXLE RANGE SWITCH (ATX) /BACK-UP LIGHT SWITCH (MTX)

•  Inspect the transaxle range switch (ATX) /back-up light switch (MTX).
(See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL]{ATX} /BACK-UP LIGHT SWITCH INSPECTION{MTX}.)

•  Is the transaxle range switch (ATX) /back-up light switch (MTX) normal?

Yes

Go to the next step.

No

Replace the transaxle range switch (ATX) /back-up light switch (MTX).

(See TRANSAXLE RANGE (TR) SWITCH REMOVAL [FS5A-EL]{ATX} /BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION{MTX}.)

After replacement, go to Step 6.

4

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 6.

5

INSPECT REVERSE GEAR SWITCH CIRCUIT FOR SHORT CIRCUIT TO POWER SUPPLY

ATX

•  Reconnect the negative battery cable.

•  Switch the ignition to ON.

•  Measure the voltage of the following connector terminals.

―  Transaxle range switch connector terminal D

―  Back-up light connector terminal A

•  Can the voltage be measured?

MTX

•  Reconnect the negative battery cable.

•  Switch the ignition to ON.

•  Measure the voltage of the following connector terminals.

―  Back-up light switch connector terminal B

―  Back-up light connector terminal A

•  Can the voltage be measured?

Yes

Repair/replace the malfunctioning vehicle wiring harness.

After repair procedure, go to the next step.

No

Go to the next step.

6

VERIFY DTC

•  Reconnect the disconnected connectors and the negative battery cable.

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

•  Switch the ignition to ON.

•  Perform the BCM DTC inspection using the M-MDS with the shift lever in R position (transaxle range switch {ATX} /back-up light switch {MTX} on).
(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 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 shift lever in R position (transaxle range switch {ATX} /back-up light switch {MTX} on). (See DTC INSPECTION [BCM].) • Is DTC C1137:12 displayed?	Yes	Go to the next step.
1		No	DTC troubleshooting completed.
2	INSPECT TRANSAXLE RANGE SWITCH (ATX) /BACK-UP LIGHT SWITCH (MTX) CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the transaxle range switch (ATX) /back-up light switch (MTX) 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 6.
3	INSPECT TRANSAXLE RANGE SWITCH (ATX) /BACK-UP LIGHT SWITCH (MTX) • Inspect the transaxle range switch (ATX) /back-up light switch (MTX). (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL]{ATX} /BACK-UP LIGHT SWITCH INSPECTION{MTX}.) • Is the transaxle range switch (ATX) /back-up light switch (MTX) normal?	Yes	Go to the next step.
3		No	Replace the transaxle range switch (ATX) /back-up light switch (MTX). (See TRANSAXLE RANGE (TR) SWITCH REMOVAL [FS5A-EL]{ATX} /BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION{MTX}.) After replacement, go to Step 6.
4	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.
4		No	Repair/replace the connector or terminal. After repair procedure, go to Step 6.
5	INSPECT REVERSE GEAR SWITCH CIRCUIT FOR SHORT CIRCUIT TO POWER SUPPLY ATX • Reconnect the negative battery cable. • Switch the ignition to ON. • Measure the voltage of the following connector terminals. ― Transaxle range switch connector terminal D ― Back-up light connector terminal A • Can the voltage be measured? MTX • Reconnect the negative battery cable. • Switch the ignition to ON. • Measure the voltage of the following connector terminals. ― Back-up light switch connector terminal B ― Back-up light connector terminal A • Can the voltage be measured?	Yes	Repair/replace the malfunctioning vehicle wiring harness. After repair procedure, go to the next step.
5		No	Go to the next step.
6	VERIFY DTC • Reconnect the disconnected connectors and the negative battery cable. • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Switch the ignition to ON. • Perform the BCM DTC inspection using the M-MDS with the shift lever in R position (transaxle range switch {ATX} /back-up light switch {MTX} on). (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 there other DTCs output?	Yes	Perform the corresponding DTC inspection.
7		No	DTC troubleshooting completed.