Infiniti FX35, FX50 (S51). Manual - part 1670

B2617 STARTER RELAY CIRCUIT

SEC-93

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

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F

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B

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N

O

P

4.

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

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-34, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

IPDM E/R

BCM

Continuity

Connector

Terminal

Connector

Terminal

E6

46

M121

52

Existed

IPDM E/R

Ground

Continuity

Connector

Terminal

E6

46

Not existed

SEC-94

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2619 BCM

B2619 BCM

Description

INFOID:0000000005249527

BCM requests IPDM E/R to supply power to steering lock unit. After receiving the power, the steering lock unit
transmits an ON signal to BCM.

DTC Logic

INFOID:0000000005249528

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Press the push-button ignition switch under the following conditions and wait for at least 1 second.

-

Selector lever is in the P or N position.

-

Do not depress brake pedal.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-94, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249529

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Check “Self diagnostic result” with CONSULT-III.

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See 

SEC-94, "DTC Logic"

.

Is the DTC B2619 displayed again?

YES

>> Replace BCM. Refer to 

BCS-83, "Removal and Installation"

.

NO

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2619

BCM

BCM detects a mismatch between the power supplied to the 
steering lock unit and the feedback for one second or more.

BCM

B261A PUSH-BUTTON IGNITION SWITCH

SEC-95

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

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N

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B261A PUSH-BUTTON IGNITION SWITCH

Description

INFOID:0000000005249530

BCM transmits the change in the power supply position with the push-button ignition switch to IPDM E/R via
CAN communication. IPDM E/R transmits the power supply position status via CAN communication to BCM.

DTC Logic

INFOID:0000000005249531

DTC DETECTION LOGIC

NOTE:
• If DTC B261A is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-31, "BCM : DTC Logic"

.

• If DTC B261A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-33, "BCM : DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE 1

1.

Press push-button ignition switch for 1 second under the following condition.

-

Selector lever is in the P or N position.

-

Do not depress brake pedal.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-95, "Diagnosis Procedure"

NO

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE 2

1.

Insert Intelligent Key into the key slot.

2.

Press the push-button ignition switch under the following conditions and wait for at least 1 second.

-

Selector lever is in the P or N position.

-

Do not depress brake pedal.

3.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-95, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249532

1.

INSPECTION START

Check the case in which DTC is detected.
• Case1: It is detected when push-button ignition switch is pressed for 1 second
• Case2: It is detected after Intelligent Key is inserted into key slot and push-button ignition switch is pressed

In which case is DTC detected?

Case1 >> GO TO 2.
Case2 >> GO TO 4.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B261A

PUSH-BTN IGNI 
SW

BCM detects the difference between the following for 
1 second or more
• Power supply position with push-button ignition 

switch

• Power supply position from IPDM E/R (CAN)

Harness or connectors
(Push-button ignition switch circuit is 
open or shorted)
• Between BCM and push-button igni-

tion switch

• Between IPDM E/R and push-button 

ignition switch

• IPDM E/R
• BCM

SEC-96

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B261A PUSH-BUTTON IGNITION SWITCH

2.

CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 1

1.

Turn ignition switch OFF.

2.

Disconnect push-button ignition switch connector and IPDM E/R connector E5.

3.

Check voltage between push-button ignition switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 3.

3.

CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT 1

1.

Disconnect BCM connector M122.

2.

Check continuity between push-button ignition switch harness connector and BCM harness connector.

3.

Check continuity between push-button ignition switch harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-83, "Removal and Installation"

.

NO

>> Repair or replace harness.

4.

CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 2

1.

Turn ignition switch OFF.

2.

Disconnect push-button ignition switch connector and BCM connector M122.

3.

Check voltage between push-button ignition switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT 2

1.

Disconnect IPDM E/R connector E5.

2.

Check continuity between push-button ignition switch harness connector and IPDM E/R harness connec-
tor.

3.

Check continuity between push-button ignition switch harness connector and ground.

(+)

(–)

Voltage (V)

(Approx.)

Push-button ignition switch

Connector

Terminal

M50

4

Ground

Battery voltage

Push-button ignition switch

BCM

Continuity

Connector

Terminal

Connector

Terminal

M50

4

M122

89

Existed

Push-button ignition switch

Ground

Continuity

Connector

Terminal

M50

4

Not existed

(+)

(–)

Voltage (V)

(Approx.)

Push-button ignition switch

Connector

Terminal

M50

4

Ground

Battery voltage

Push-button ignition switch

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

M50

4

E5

28

Existed