Nissan Murano Z51. Manual - part 1524

WT-34

< DTC/CIRCUIT DIAGNOSIS >

C1734 BCM

C1734 BCM

DTC Logic

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DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

Drive at a speed of 40 km/h (25 MPH) or more for several minutes without stopping.

2.

Perform “SELF-DIAG RESULTS” in “AIR PRESSURE MONITOR” of “BCM”.

CAUTION:

Perform within 15 minutes after stop the vehicle.

Is DTC “C1734” detected?

YES

>> Perform trouble diagnosis. Refer to 

WT-34, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

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1.

CHECK BCM POWER SUPPLY

1.

Turn the ignition switch OFF.

2.

Disconnect BCM harness connector.

3.

Check voltage between BCM harness connector terminals and ground.

Is the power supply normal?

YES

>> GO TO 2.

NO

>>

Check the following. If any items are damaged, repair or replace damage parts.

• 40A fusible link [No. L located in the fuse block]. Refer to 

PG-114, "Fuse and Fusible Link

Arrangement"

.

• 10A fuse [No. 10 located in the fuse block (J/B)]. Refer to 

PG-113, "Fuse, Connector and Termi-

nal Arrangement"

.

• Harness for short or open between battery and BCM harness connector M118 terminal 1.
• Harness for short or open between battery and BCM harness connector M119 terminal 11.
• Check the Battery voltage.

2.

CHECK BCM GROUND

Check the continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK HARNESS BETWEEN BCM AND TIRE PRESSURE RECEIVER 

1.

Disconnect tire pressure receiver harness connector.

2.

Check the continuity between BCM harness connector and tire pressure receiver harness connector.

DTC 

Display item

Malfunction detected condition

Possible case

C1734

CONTROL UNIT

Tire pressure monitoring system malfunction in BCM

BCM malfunction

BCM

—

Voltage

Connector

Terminal

M118

1

Ground

Battery voltage

M119

11

BCM

—

Continuity

Connector

Terminal

M119

13

Ground

Existed

C1734 BCM

WT-35

< DTC/CIRCUIT DIAGNOSIS >

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3.

Check the continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK BCM 

Check the BCM input/output signal. Refer to 

BCS-47, "Reference Value"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 5.

5.

CHECK BCM HARNESS CONNECTOR

Check the BCM pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-95, "Exploded View"

.

NO

>> Check for looseness or damage at the harness connector pins of the low tire pressure warning

control unit. Repair or replace if necessary.

Special Repair Requirement

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1.

CHECK TIRE PRESSURE

Check all tires for tire pressures. Refer to 

WT-60, "Tire Air Pressure"

.

Does all tire pressure data meet the specification?

YES

>> GO TO 2.

NO

>> Inspect or repair the tires or wheels and adjust the tire pressure to the specification.

2.

PERFORM ID REGISTRATION

Perform ID registration. Refer to 

WT-22, "ID REGISTRATION PROCEDURE : Special Repair Requirement"

.

>> END

BCM

Tire pressure receiver

Continuity

Connector

Terminal

Connector

Terminal

M123

137

M21

1

Existed

138

4

139

2

BCM

—

Continuity

Connector

Terminal

M123

137

Ground

Not existed

138

139

WT-36

< DTC/CIRCUIT DIAGNOSIS >

TIRE PRESSURE RECEIVER

TIRE PRESSURE RECEIVER

Component Function Check

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1.

TIRE PRESSURE MONITORING SYSTEM OPERATION

With CONSULT-III 

1.

Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.

2.

On “DATA MONITOR”, select “AIR PRESS FL”, “AIR PRESS FR”, “AIR PRESS RR” and “AIR PRESS
RL”, and check that the tire pressures match the standard value.

CAUTION:

Stop the vehicle and within 5 minutes, use CONSULT-III “DATA MONITOR” to display the tire pressure
for all wheels.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Perform trouble diagnosis. Refer to 

WT-36, "Diagnosis Procedure"

.

Diagnosis Procedure

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1.

CHECK TIRE PRESSURE RECEIVER SIGNAL

1.

Turn the ignition switch ON.

CAUTION:

Never start the engine.

2.

Check tire pressure receiver connector and ground signal with oscilloscope.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK TIRE PRESSURE RECEIVER INPUT VOLTAGE

1.

Disconnect tire pressure receiver connector.

2.

Check voltage between tire pressure receiver connector and ground.

Monitor item

Condition

Displayed value

AIR PRESS FL

Drive for 3 minutes at a speed of 40 km/h (25 MPH) or 
more, then drive normally for 10 minutes.

Internal pressure of tires

AIR PRESS FR

AIR PRESS RR

AIR PRESS RL

Tire pressure receiver

—

Condition

Voltage (Approx.)

Connector

Terminal

M21

2

Ground

Stand by state

When receiving the signal from the trans-
mitter

OCC3881D

OCC3880D

TIRE PRESSURE RECEIVER

WT-37

< DTC/CIRCUIT DIAGNOSIS >

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Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts. 

3.

CHECK TIRE PRESSURE RECEIVER GROUND CIRCUIT

1.

Disconnect BCM harness connector.

2.

Check continuity between BCM harness connector and tire pressure receiver connector.

3.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts. 

4.

CHECK BCM CIRCUIT

Inspect the BCM circuit. Refer to 

WT-34, "Diagnosis Procedure"

.

Is the BCM circuit normal?

YES

>> Replace tire pressure receiver. Refer to 

WT-59, "Removal and Installation"

.

NO

>> Replace BCM. Refer to 

BCS-95, "Exploded View"

.

Tire pressure receiver

—

Voltage (Approx.)

Connector

Terminal

M21

4

Ground

5.0 V

BCM

Tire pressure receiver

Continuity

Connector

Terminal

Connector

Terminal

M123

137

M21

1

Existed

BCM

—

Continuity

Connector

Terminal

M123

137

Ground

Not existed