Infiniti G37 Coupe. Manual - part 1141

 

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Infiniti G37 Coupe. Manual - part 1141

 

 

B2556 PUSH-BUTTON IGNITION SWITCH

SEC-61

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

Is the inspection normal?

YES

>> Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000001699952

1.

CHECK PUSH-BUTTON IGNITION SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect push-button ignition switch connector.

3.

Check continuity between push-button ignition switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Replace push-button ignition switch.

Push-button ignition switch

Ground

Continuity

Connector

Terminal

M50

4

Ground

Not existed

Push-button ignition switch

Condition

Continuity

Connector

Terminal

M50

1

4

Pressed

Existed

Not pressed

Not existed

SEC-62

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2557 VEHICLE SPEED

B2557 VEHICLE SPEED

Description

INFOID:0000000001699953

BCM receives the 2 vehicle speed signals via CAN communication. 1 signal is transmitted by the “unified
meter and A/C amp.” Another signal is transmitted by “ABS actuator and electric unit (control unit)”. BCM com-
pares both signals to detect the vehicle speed.

DTC Logic

INFOID:0000000001699954

DTC DETECTION LOGIC

NOTE:
• If DTC B2557 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-36, "DTC Logic"

.

• If DTC B2557 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-37, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Drive the vehicle at the vehicle speed of 10 km/h (6.2 MPH) or more and wait for at least 10 seconds.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-62, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000001699955

1.

CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”

Check “Self diagnostic result” with CONSULT-III. Refer to 

BRC-88, "DTC No. Index"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace the malfunctioning parts.

2.

CHECK DTC WITH “UNIFIED METER AND A/C AMP.”

Check “Self diagnostic result” with CONSULT-III. Refer to 

MWI-100, "DTC Index"

.

>> INSPECTION END.

DTC

Self-diagnosis 

name

DTC detecting condition

Possible causes

B2557

VEHICLE 

SPEED

BCM detects the following difference between the vehicle 
speed from “unified meter and A/C amp” and the one from 
“ABS actuator and electric unit” for 10 seconds continuously
• One is 10 km/h (6.2 MPH) or more and the other is 4 km/

h (2.5 MPH) or less.

• Wheel sensor
• Unified meter and A/C amp.
• ABS actuator and electric 

unit (control unit)

B2560 STARTER CONTROL RELAY

SEC-63

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2560 STARTER CONTROL RELAY

Description

INFOID:0000000001699956

Starter control relay, integrated in IPDM E/R, permits the starter relay operation when in N or P position and
the steering is locked or unlocked. It is installed in parallel with the starter relay.

DTC Logic

INFOID:0000000001699957

DTC DETECTION LOGIC

NOTE:
• If DTC B2560 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-36, "DTC Logic"

.

• If DTC B2560 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-37, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON under the following conditions and wait for at least 2 seconds.

A/T models

-

A/T selector lever is in the P or N position

-

Do not depress brake pedal

M/T models

-

Do not depress clutch pedal

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-63, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000001699958

1.

CHECK DTC WITH IPDM E/R

Check “Self diagnostic result” with CONSULT-III. Refer to 

PCS-32, "DTC Index"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace the malfunctioning parts.

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> INSPECTION END.

DTC

Self-diagnosis name

DTC detecting condition

Possible causes

B2560

STARTER CONTROL 
RELAY

BCM detects a mismatch between the OFF re-
quest of starter control relay to IPDM E/R and the 
feedback. (The feedback is ON instead of OFF.)

• IPDM E/R

SEC-64

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2601 SHIFT POSITION

B2601 SHIFT POSITION

Description

INFOID:0000000001699959

BCM confirms the shift position with the following 4 signals.
• A/T selector lever
• P/N position switch
• P position signal from IPDM E/R (CAN)
• P position signal from TCM (CAN)

DTC Logic

INFOID:0000000001699960

DTC DETECTION LOGIC

NOTE:
• If DTC B2601 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-36, "DTC Logic"

.

• If DTC B2601 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-37, "DTC Logic"

.

• If DTC B2601 is displayed with DTC B2603, first perform the trouble diagnosis for DTC B2603. Refer to

SEC-74, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON under the following conditions, and wait for at least 2 seconds.

-

A/T selector lever is in the P position.

-

Do not depress the brake pedal.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-64, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000001699961

1.

CHECK A/T DEVICE POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect A/T device (detention switch) connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK A/T DEVICE POWER SUPPLY CIRCUIT

1.

Disconnect BCM connector M122.

2.

Check continuity between A/T device (detention switch) harness connector and BCM harness connector.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2601

SHIFT POSITION

BCM detects when a difference between the shift 
P input signal and the shift position signal re-
ceived from IPDM E/R via CAN communication 
continues for 2 seconds or more

• Harness or connectors

(A/T device circuit is open or short-
ed.)

• A/T device (detention switch)

A/T device (detention switch)

Ground

Voltage [V]

Connector

Terminal

M137

10

Ground

Battery voltage

 

 

 

 

 

 

 

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