NISSAN X-TRAIL 2003 Service Repair Manual

CAN COMMUNICATION
BRC-57
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

A/T position indicator lamp signal T R R
O/D OFF indicator signal T R
Overdrive control switch signal R T
Engine speed signal T R R R
Engine coolant temperature signal TR
A/C compressor feedback signal TR
Vehicle speed signalTRR
RT
ABS warning lamp signal T R
Brake warning lamp signal T R
SLIP indicator lamp signal T R
ESP OFF indicator lamp signal T R
4WD warning lamp signalTR
4WD mode indicator lamp signalTR
Parking brake switch signalRT
MI signal TR Signals ECM TCMESP/TCS/
ABS control
unitSteering
angle sensor4WD control
unitCombination
meter

BRC-58
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

TROUBLE DIAGNOSISPFP:00004
How to Proceed With DiagnosisEFS004HQ
BASIC CONCEPT

Most important point to perform diagnosis is to understand systems (control and mechanism) in vehicle
thoroughly.

It is also important to clarify customer complaints before inspec-
tion.
First of all, reproduce symptom, and understand it fully.
Ask customer about his/her complaints carefully. In some cases,
it will be necessary to check symptom by driving vehicle with
customer.
NOTE:
Customers are not professionals. Do not assume “maybe cus-
tomer means...” or “maybe customer mentioned this symptom”.

It is essential to check symptoms right from beginning in order to
repair a malfunction completely.
For an intermittent malfunction, it is important to reproduce
symptom based on interview with customer and past examples.
Do not perform inspection on ad hoc basis. Most intermittent
malfunctions are caused by poor contacts. In this case, it will be
effective to shake suspected harness or connector by hand.
When repairs are performed without any symptom check, no
one can judge if malfunction has actually been eliminated.

After diagnosis, make sure to carry out “erase memory”. Refer to
BRC-27, "
SELF-DIAGNOSIS" .

For an intermittent malfunction, move harness or harness con-
nector by hand to check poor contact or false open circuit.

Always read “GI General Information” to confirm general precautions. Refer to GI-4, "General Precau-
tions" .
SEF234G
SEF233G

TROUBLE DIAGNOSIS
BRC-59
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

DIAGNOSIS FLOWCHART
SFIA1664E

BRC-60
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

ASKING COMPLAINTS

Complaints against malfunction vary depending on each person.
It is important to clarify customer complaints.

Ask customer about what symptoms are present and under
what conditions. Use information to reproduce symptom while
driving.

It is also important to use diagnosis sheet so as not to miss infor-
mation.
EXAMPLE OF DIAGNOSIS SHEET
SBR339B
SFIA2202E

TROUBLE DIAGNOSIS
BRC-61
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Component Parts and Harness Connector Location EFS001A3
SFIA1814E

BRC-62
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

SchematicEFS001A4
TFWA0087E

TROUBLE DIAGNOSIS
BRC-63
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Wiring Diagram —ESP/TCS/ABS—EFS001A5
LHD MODEL
TFWA0088E

BRC-64
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

TFWA0089E

TROUBLE DIAGNOSIS
BRC-65
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

TFWA0090E

BRC-66
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

TFWA0091E