Infiniti FX35, FX50 (S51). Manual - part 1424

PCS-54

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B2614 ACC RELAY

B2614 ACC RELAY

Description

INFOID:0000000005240678

BCM controls the various electrical components and simultaneously supplies power according to the power
supply position.
BCM checks the power supply position internally.

DTC Logic

INFOID:0000000005240679

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn the power supply position to ACC 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 

PCS-54, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005240680

1.

CHECK ACCESSORY RELAY POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect accessory relay.

3.

Check voltage between accessory relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK ACCESSORY RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check continuity between accessory relay harness connector and BCM harness connector.

4.

Check continuity between accessory relay harness connector and ground.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2614

ACC RELAY CIRC

An immediate operation of ACC relay is requested 
by BCM, but there is no response for more than 1 
second.

• Harness or connectors

(ACC relay circuit is open or short-
ed)

• ACC relay

(+)

(–)

Condition

Voltage (V)

(Approx.)

Accessory relay

Terminal

1

Ground

Ignition switch

OFF

0

ACC

Battery voltage

Accessory relay

BCM

Continuity

Terminal

Connector

Terminal

1

M122

95

Existed

PCS

B2614 ACC RELAY

PCS-55

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-83, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK ACCESSORY RELAY GROUND CIRCUIT

Check continuity between accessory relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair accessory relay ground circuit.

4.

CHECK ACCESSORY RELAY

Refer to 

PCS-55, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace accessory relay.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005240681

1.

CHECK ACCESSORY RELAY

1.

Turn ignition switch OFF.

2.

Remove accessory relay.

3.

Check the continuity between accessory relay terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace accessory relay.

Accessory relay

Ground

Continuity

Terminal

1

Not existed

Accessory relay

Ground

Continuity

Terminal

2

Existed

Terminals

Condition

Continuity

3 and 5

12 V direct current supply between terminals 1 and 2

Existed

No current supply

Not existed

PBIB0098E

PCS-56

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B2615 BLOWER RELAY CIRCUIT

B2615 BLOWER RELAY CIRCUIT

Description

INFOID:0000000005240682

BCM controls the various electrical components and simultaneously supplies power according to the power
supply position.
BCM checks the power supply position internally.

DTC Logic

INFOID:0000000005240683

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON 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 

PCS-56, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005240684

1.

CHECK BLOWER RELAY POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect blower relay.

3.

Check voltage between blower relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK BLOWER RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check continuity between blower relay harness connector and BCM harness connector.

4.

Check continuity between blower relay harness connector and ground.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2615

BLOWER RELAY 
CIRC

BCM detects a difference of signal for 1 second or 
more between the following information.
• Blower relay ON/OFF request 
• Blower relay feedback

• Harness or connectors 

(Blower relay circuit is open or 
shorted)

• Blower relay

(+)

(–)

Condition

Voltage (V)

(Approx.)

Blower relay

Terminal

1

Ground

Ignition switch

OFF or ACC

0

ON

Battery voltage

Blower relay

BCM

Continuity

Terminal

Connector

Terminal

1

M122

102

Existed

PCS

B2615 BLOWER RELAY CIRCUIT

PCS-57

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-83, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK BLOWER RELAY GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between blower relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair blower relay ground circuit.

4.

CHECK BLOWER RELAY

Refer to 

PCS-57, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace blower relay.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005240685

1.

CHECK BLOWER RELAY

1.

Turn ignition switch OFF.

2.

Remove blower relay.

3.

Check the continuity between blower relay terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace blower relay

Blower relay

Ground

Continuity

Terminal

1

Not existed

Blower relay

Ground

Continuity

Terminal

2

Existed

Terminals

Condition

Continuity

3 and 5

12 V direct current supply between terminals 1 and 2

Existed

No current supply

Not existed

PBIB0098E