Nissan Murano Z51. Manual - part 1423

P0703 BRAKE SWITCH B

TM-43

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F09B]

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P0703 BRAKE SWITCH B

Description

INFOID:0000000005513968

BCM detects ON/OFF state of the stop lamp switch and transmits the data to the TCM via CAN communica-
tion by converting the data to a signal.

DTC Logic

INFOID:0000000005513969

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Turn ignition switch ON.

2.

Start engine.

3.

Drive vehicle for at least 3 consecutive seconds.

4.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is “P0703” detected?

YES

>> Go to 

TM-43, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000005513970

1.

CHECK STOP LAMP SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Check and adjust the installation position of stop lamp switch. Refer to 

BR-9, "Inspection and Adjustment"

.

3.

Disconnect BCM connector.

4.

Turn ignition switch ON.

5.

Check voltage between BCM vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN STOP LAMP SWITCH AND BCM (PART 1)

1.

Turn ignition switch OFF.

2.

Disconnect stop lamp switch connector.

3.

Check continuity between stop lamp switch vehicle side harness connector terminal and BCM vehicle side
harness connector terminal.

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0703

Brake Switch B Circuit

When the brake switch does not switch to 
ON or OFF.

• Harness or connectors
- (Stop lamp switch and BCM circuit are 

open or shorted.)

- (CAN communication line is open or 

shorted.)

• Stop  lamp  switch

BCM vehicle side harness connector

 Ground

Condition

Voltage (Approx.)

Connector

Terminal

M123

118

Depressed brake pedal

Battery voltage

Released brake pedal

0 V

TM-44

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F09B]

P0703 BRAKE SWITCH B

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK HARNESS BETWEEN STOP LAMP SWITCH AND BCM (PART 2)

Check continuity between BCM vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK STOP LAMP SWITCH

Check stop lamp switch. Refer to 

TM-44, "Component Inspection (Stop Lamp Switch)"

.

Is the inspection result normal?

YES

>>

Check the following.

• Harness for short or open between battery and stop lamp switch
• 10A fuse [No. 7, located in fuse block (J/B)]

NO

>> Repair or replace stop lamp switch.

5.

CHECK BCM

With CONSULT-III

1.

Turn ignition switch OFF.

2.

Connect BCM connector.

3.

Turn ignition switch ON.

4.

Select “BRAKE SW 1” in “Data Monitor” in “BCM” and verify the proper operation of ON/OFF. Refer to

BCS-47, "Reference Value"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace BCM. Refer to 

BCS-95, "Removal and Installation"

.

6.

DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> Replace TCM. Refer to 

TM-160, "Exploded View"

.

NO

>> Repair or replace damaged parts.

Component Inspection (Stop Lamp Switch)

INFOID:0000000005513971

1.

CHECK STOP LAMP SWITCH

Check continuity between stop lamp switch connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

Stop lamp switch vehicle side harness connector

BCM vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

E116

2

M123

118

Existed

BCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

M123

118

Not existed

Stop lamp switch connector

Condition

Continuity

Connector

Terminal

E116

1

 2

Depressed brake pedal

Existed

Released brake pedal

Not existed

P0703 BRAKE SWITCH B

TM-45

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F09B]

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NO

>> Replace stop lamp switch. Refer to 

BR-20, "Exploded View"

.

TM-46

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F09B]

P0705 TRANSMISSION RANGE SWITCH A

P0705 TRANSMISSION RANGE SWITCH A

Description

INFOID:0000000005513972

• The transmission range switch is included in the control valve assembly.
• The transmission range switch includes 4 transmission position switches.
• TCM judges the selector lever position by the transmission range switch signal.

DTC Logic

INFOID:0000000005513973

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “Data Monitor” in “TRANSMISSION”.

3.

Start engine.

4.

Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.
Is “P0705” detected?

YES

>> Go to 

TM-46, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000005513974

1.

CHECK CVT POSITION

1.

Disconnect CVT unit connector.

2.

Remove control cable from manual lever. Refer to

TM-164, "Exploded View"

.

3.

Check transmission range switch. Refer to 

TM-47, "Component Inspection"

.

Is the inspection result normal?

 Shift position

Transmission range 

switch 1

Transmission range 

switch 2

Transmission range 

switch 3

Transmission range 

switch 4

Transmission range 

switch 3 (monitor)

P

OFF

OFF

OFF

OFF

OFF

R

ON

OFF

OFF

ON

OFF

N

ON

ON

OFF

OFF

OFF

D

ON

ON

ON

ON

ON

L

OFF

ON

ON

OFF

ON

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0705

Transmission Range Sensor 
A Circuit (PRNDL Input)

TCM does not receive the correct voltage 
signal (based on the gear position) from the 
switch.

• Harness or connectors

(Transmission range switches circuit is 
open or shorted.)

• Transmission range switch

VEHICLE SPEED

: More than 10 km/h (6 MPH)

ENG SPEED SIG

: More than 450 rpm

ACC PEDAL OPEN

: More than 1.0/8