Infiniti QX56 (Z62). Manual - part 1174

SEC-86

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2603 SHIFT POSITION

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

REPLACE BCM

1.

Replace BCM. Refer to 

BCS-81, "Removal and Installation"

.

2.

Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

>> INSPECTION END

5.

CHECK BCM INPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Disconnect A/T assembly connector.

4.

Check continuity between A/T assembly harness connector and BCM harness connector.

5.

Check continuity between A/T assembly harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair or replace harness.

6.

CHECK A/T SHIFT SELECTOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect A/T shift selector (detention switch) connector.

3.

Check voltage between A/T shift selector (detention switch) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 7.

7.

CHECK A/T SHIFT SELECTOR POWER SUPPLY CIRCUIT

1.

Disconnect BCM connector.

2.

Check continuity between A/T shift selector (detention switch) harness connector and BCM harness con-
nector.

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M71

102

Ground

Selector lever

P or N position

12

Other than above

0

A/T assembly

BCM

Continuity

Connector

Terminal

Connector

Terminal

F51

9

M71

102

Existed

A/T assembly

Ground

Continuity

Connector

Terminal

F51

9

Not existed

(+)

(–)

Voltage (V)

(Approx.)

A/T shift selector (detention switch)

Connector

Terminal

M57

13

Ground

12

B2603 SHIFT POSITION

SEC-87

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

3.

Check continuity between A/T shift selector (detention switch) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace harness.

8.

REPLACE BCM

1.

Replace BCM. Refer to 

BCS-81, "Removal and Installation"

.

2.

Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

>> INSPECTION END

9.

CHECK A/T SHIFT SELECTOR CIRCUIT

1.

Disconnect BCM connector and IPDM E/R connector.

2.

Check continuity between A/T shift selector (detention switch) harness connector and BCM harness con-
nector.

3.

Check continuity between A/T shift selector (detention switch) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair or replace harness.

10.

CHECK A/T SHIFT SELECTOR (DETENTION SWITCH)

Refer to 

SEC-87, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace A/T shift selector. Refer to 

TM-176, "Removal and Installation"

.

11.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000006226238

1.

CHECK A/T SHIFT SELECTOR (DETENTION SWITCH)

1.

Turn ignition switch OFF.

2.

Disconnect A/T shift selector connector.

3.

Check continuity between A/T shift selector (detention switch) terminals.

A/T shift selector (detention switch)

BCM

Continuity

Connector

Terminal

Connector

Terminal

M57

13

M71

104

Existed

A/T shift selector (detention switch)

Ground

Continuity

Connector

Terminal

M57

13

Not existed

A/T shift selector (detention switch)

BCM

Continuity

Connector

Terminal

Connector

Terminal

M57

14

M68

37

Existed

A/T shift selector (detention switch)

Ground

Continuity

Connector

Terminal

M57

14

Not existed

SEC-88

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2603 SHIFT POSITION

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace A/T shift selector. Refer to 

TM-176, "Removal and Installation"

.

A/T shift selector (detention switch)

Condition

Continuity

Terminal

13

14

Selector lever

P position

Not existed

Other than above

Existed

B2604 SHIFT POSITION

SEC-89

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2604 SHIFT POSITION

DTC Logic

INFOID:0000000006226239

DTC DETECTION LOGIC

NOTE:
• If DTC B2604 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-70, "DTC Logic"

.

• If DTC B2604 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

BCS-71, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Shift the selector lever to the P position.

2.

Turn ignition switch ON and wait 5 seconds or more.

3.

Shift the selector lever to the N position and wait 5 seconds or more.

4.

Shift the selector lever to any position other than P and N, and wait 5 seconds or more.

5.

Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-89, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226240

1.

CHECK DTC OF TCM

Check DTC in “Self Diagnostic Result” mode of “TCM” using CONSULT-III.
Is DTC detected?

YES

>> Perform the trouble diagnosis related to the detected DTC. Refer to 

TM-78, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK BCM INPUT SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

REPLACE BCM

1.

Replace BCM. Refer to 

BCS-81, "Removal and Installation"

.

2.

Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2604

PNP/CLUTCH SW

The following states are detected for 5 seconds 
while ignition switch is ON.
• P/N position signal is sent  from TCM but shift 

position signal input (CAN) from TCM is other 
than P and N

• P/N  position signal is not sent from TCM but 

shift position signal input (CAN) from TCM is P 
or N

• Harness or connectors

(CAN communication line is open 
or shorted.)

• Harness or connectors

(TCM circuit is open or shorted.)

• TCM
• BCM

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M71

102

Ground

Selector lever

P or N position

12

Other than above

0