Infiniti FX35, FX50 (S51). Manual - part 1671

B261A PUSH-BUTTON IGNITION SWITCH

SEC-97

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-34, "Removal and Installation"

.

NO

>> Repair or replace harness.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Push-button ignition switch

Ground

Continuity

Connector

Terminal

M50

4

Not existed

SEC-98

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B261E VEHICLE TYPE

B261E  VEHICLE TYPE

Description

INFOID:0000000005249533

There are two types of vehicles.
• HEV
• Conventional

DTC Logic

INFOID:0000000005249534

DTC DETECTION LOGIC

NOTE:
• If DTC B261E is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-31, "BCM : DTC Logic"

.

• If DTC B261E 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.

Turn ignition switch ON.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-98, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249535

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-98, "DTC Logic"

.

Is the 1st trip DTC B261E 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

B261E

VEHICLE TYPE

Difference of BCM configuration

BCM

B2108 STEERING LOCK RELAY

SEC-99

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2108 STEERING LOCK RELAY

Description

INFOID:0000000005249536

The steering lock relay ON signal is transmitted to IPDM E/R by BCM via CAN communication.
IPDM E/R turns the steering lock relay ON and transmits the release of the steering to BCM.

DTC Logic

INFOID:0000000005249537

DTC DETECTION LOGIC

NOTE:
If DTC B2108 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to 

SEC-

31, "IPDM E/R : DTC 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-99, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249538

1.

CHECK STEERING LOCK RELAY

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

Is the inspection normal?

YES

>> GO TO 2.

NO

>> Replace IPDM E/R. Refer to 

PCS-34, "Removal and Installation"

.

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2108

STRG LCK RELAY ON

IPDM E/R detects that the relay is stuck in the ON 
position for about 1 second even if the IPDM E/R re-
ceives steering lock relay ON/OFF signal from BCM.

IPDM E/R

(+)

(–)

Condition

Voltage (V)

(Approx.)

IPDM E/R

Connector

Terminal

E5

11

Ground

Ignition switch 
OFF

A few seconds after 
opening the driver door

Battery voltage

Ignition switch 
LOCK

Press the push-button 
ignition switch

Battery voltage

Ignition switch ACC or ON

0

SEC-100

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2109 STEERING LOCK RELAY

B2109 STEERING LOCK RELAY

Description

INFOID:0000000005249539

The steering lock relay ON signal is transmitted to IPDM E/R by BCM via CAN communication.
IPDM E/R turns the steering lock relay ON and transmits the release of the steering to BCM.

DTC Logic

INFOID:0000000005249540

DTC DETECTION LOGIC

NOTE:
• If DTC B2109 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-31, "IPDM E/R : DTC Logic"

.

• When IPDM E/R power supply voltage is low (Approx. 7 - 8 V for about 1 second), the DTC B2109 may be

detected.

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-100, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249541

1.

CHECK POWER SUPPLY CIRCUIT

Check IPDM E/R power supply circuit. Refer to 

SEC-114, "IPDM E/R : Diagnosis Procedure"

.

Is the circuit normal?

YES

>> GO TO 2.

NO

>> Repair or replace the malfunctioning part.

2.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

Check 10A fuse (No. 48, located in IPDM E/R).

Is the inspection normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-34, "Removal and Installation"

.

NO

>>

Check the following.

• Harness for open or short between IPDM E/R and battery
• Fuse

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2109

STRG LCK RELAY 
OFF

IPDM E/R detects that the relay is stuck in the OFF 
position for about 1 second even if the IPDM E/R 
receives steering lock relay ON/OFF signal from 
BCM.

• Harness or connector (Power sup-

ply circuit)

• IPDM E/R
• Battery