Infiniti QX56 (Z62). Manual - part 1175

SEC-90

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2604 SHIFT POSITION

For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

>> INSPECTION END

4.

CHECK BCM INPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect A/T assembly connector.

3.

Disconnect BCM 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 5.

NO

>> Repair or replace harness.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

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

B2605 SHIFT POSITION

SEC-91

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2605 SHIFT POSITION

DTC Logic

INFOID:0000000006226241

DTC DETECTION LOGIC

NOTE:
• If DTC B2605 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-70, "DTC Logic"

.

• If DTC B2605 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 1 second or more.

3.

Shift the selector lever to the N position and wait 1 second or more.

4.

Shift the selector lever to any position other than P and N, and wait 1 second or more.

5.

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

Is DTC detected?

YES

>> Go to 

SEC-91, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226242

1.

CHECK IPDM E/R INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R connector.

3.

Turn ignition switch ON.

4.

Check voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-32, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK IPDM E/R INPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check continuity between IPDM E/R harness connector and BCM harness connector.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2605

PNP/CLUTCH SW

When ignition switch is ON, P/N position 
signal input from TCM and P/N position 
signal (CAN) input from IPDM E/R do not 
match.

• Harness or connectors

(CAN communication line is open or 
shorted.)

• Harness or connectors

(TCM circuit is open or shorted.)

• IPDM E/R
• BCM

(+)

(–)

Condition

Voltage (V)

(Approx.)

IPDM E/R

Connector

Terminal

E15

48

Ground

Selector lever

P or N position

12

Other than above

0

IPDM E/R

BCM

Continuity

Connector

Terminal

Connector

Terminal

E15

48

M71

102

Existed

SEC-92

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2605 SHIFT POSITION

4.

Check continuity between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

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.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

>> INSPECTION END

IPDM E/R

Ground

Continuity

Connector

Terminal

E15

48

Not existed

B2608 STARTER RELAY

SEC-93

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2608 STARTER RELAY

DTC Logic

INFOID:0000000006226243

DTC DETECTION LOGIC

NOTE:
• If DTC B2608 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-70, "DTC Logic"

.

• If DTC B2608 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.

Press push-button ignition switch under the following conditions to start engine.

-

Selector lever: In the P position

-

Brake pedal: Depressed

2.

Wait 1 second after engine started.

3.

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

Is DTC detected?

YES

>> Go to 

SEC-93, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226244

1.

CHECK DTC OF IPDM E/R

Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.

Is DTC detected?

YES

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

PCS-22, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK BCM POWER SUPPLY CIRCUIT

1.

Turn ignition switch ON.

2.

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK STARTER RELAY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R connector.

3.

Disconnect BCM connector.

4.

Check continuity between IPDM E/R harness connector and BCM harness connector.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2608

STARTER RELAY

BCM outputs starter motor relay OFF signal 
but BCM receives starter motor relay ON 
signal from IPDM E/R (CAN).

• Harness or connectors 

(CAN communication line is open or 
shorted.)

• Harness or connectors 

(Starter relay circuit is open or shorted.)

• IPDM E/R

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M71

97

Ground

Selector lever

N or P position

12

Other than above

0