Infiniti QX4 (R50). Manual — part 531

How to Perform Trouble Diagnoses for Quick
and Accurate Repair

=NBRS0041

A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malfunction. It is important to fully understand the symp-
toms or conditions for a customer complaint.

INFORMATION FROM CUSTOMER

NBRS0041S01

WHAT . . Vehicle model
WHEN . . Date, Frequencies
WHERE . . Road conditions
HOW . . Operating conditions, Symptoms

PRELIMINARY CHECK

NBRS0041S02

Check that the following parts are in good order.

I

Battery [Refer to SC-4, “BATTERY”.]

I

Fuse [Refer to EL-16, “Fuse”, “POWER SUPPLY ROUTING”.]

I

System component-to-harness connections

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

How to Perform Trouble Diagnoses for Quick and Accurate Repair

RS-32

WORK FLOW

=NBRS0041S03

NOTE:
Seat belt pre-tensioner malfunction is indicated by “AIR BAG” warning lamp.

SRS799

*1: RS-32
*2: RS-38

*3: RS-39
*4: RS-48

*5: RS-42
*6: RS-53

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

BT

HA

SC

EL

IDX

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

How to Perform Trouble Diagnoses for Quick and Accurate Repair (Cont’d)

RS-33

Schematic

NBRS0042

MRS325A

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

Schematic

RS-34

Wiring Diagram — SRS —

NBRS0043

MRS326A

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

BT

HA

SC

EL

IDX

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

Wiring Diagram — SRS —

RS-35