Nissan Quest E52. Manual - part 940

PCS

B2614 ACC RELAY CIRCUIT

PCS-57

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

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DTC/CIRCUIT DIAGNOSIS

B2614 ACC RELAY CIRCUIT

DTC Logic

INFOID:0000000009652879

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch to ACC, and wait for 1 second or more.

2.

Check “Self-diagnosis result” of BCM with CONSULT. 

Is DTC detected?

YES

>> Go to 

PCS-57, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009652880

1.

CHECK ACCESSORY RELAY CONTROL SIGNAL

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

2.

CHECK ACCESSORY RELAY CONTROL SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector and accessory relay.

3.

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

4.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2614

BCM

The following status are compared, and it does not 
agree for 1 second or more.
• State of accessory relay control judgment in BCM
• State of accessory relay control signal

• Harness or connectors (Accessory 

relay control signal circuit)

• BCM
• Accessory relay

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M124

96

Ground

Ignition switch

OFF

0 - 0.5

ACC or ON

9 - 16

BCM

Accessory relay

Continuity

Connector

Terminal

Terminal

M124

96

Coil upstream side

Existed

BCM

Ground

Continuity

Connector

Terminal

M124

96

Not existed

PCS-58

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B2614 ACC RELAY CIRCUIT

3.

CHECK ACCESSORY RELAY

Refer to 

PCS-58, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

NO

>> Replace accessory relay.

Component Inspection

INFOID:0000000009652881

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

Terminals

Condition

Continuity

3 and 5

12 V direct current supply between terminals 1 and 2

Existed

No current supply

Not existed

PBIB0098E

PCS

B2615 BLOWER RELAY CIRCUIT

PCS-59

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

B2615 BLOWER RELAY CIRCUIT

DTC Logic

INFOID:0000000009652882

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON, and wait for 1 second or more.

2.

Check “Self-diagnosis result” with CONSULT. 

Is DTC detected?

YES

>> Go to 

PCS-61, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009652883

1.

CHECK BLOWER RELAY CONTROL SIGNAL

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

2.

CHECK BLOWER RELAY CONTROL SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector and blower relay.

3.

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

4.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK BLOWER RELAY

Refer to 

PCS-58, "Component Inspection"

.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2616

BCM

The following status are compared, and it does not 
agree for 1 second or more.
• State of blower relay control judgment in BCM
• State of blower relay control signal

• Harness or connectors (Blower re-

lay control signal circuit)

• BCM
• Blower relay

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M124

106

Ground

Ignition switch

OFF or ACC

0 - 0.5

ON

9 - 16

BCM

Blower relay

Continuity

Connector

Terminal

Terminal

M124

106

Coil upstream side

Existed

BCM

Ground

Continuity

Connector

Terminal

M124

106

Not existed

PCS-60

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B2615 BLOWER RELAY CIRCUIT

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

NO

>> Replace blower relay.

Component Inspection

INFOID:0000000009652884

1.

CHECK BLOWER RELAY

1.

Turn blower 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

Terminals

Condition

Continuity

3 and 5

12 V direct current supply between terminals 1 and 2

Existed

No current supply

Not existed

PBIB0098E