Nissan 350Z Workshop Maunual 2006 (9) PDF | Page 86

BRC-86
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2005 August 2006 350Z
TROUBLE DIAGNOSIS PFP:00004
Fail-Safe Function NFS000IK
VDC/TCS SYSTEM
In case of Throttle Control System trouble, the VDC OFF indicator lamp and SLIP indicator lamp are turned
on, and the condition of the vehicle is the same as the condition of vehicles without VDC/TCS equipment. In
case of trouble to the Throttle Control System, the ABS control continues to operate normally without VDC/
TCS control.
CAUTION:
If the Fail-Safe function is activated, then perform the self diagnosis for VDC/TCS/ABS control system.
ABS, EBD SYSTEM
In case of the electrical problems with the ABS, the ABS warning lamp, VDC OFF indicator lamp and SLIP
indicator lamp will turn on. In case of the electrical problem with the EBD, brake warning lamp, ABS warning
lamp, VDC OFF indicator lamp and SLIP indicator lamp will turn on. Simultaneously, the VDC/TCS/ABS
become one of the following conditions of the Fail-Safe function.
? For ABS trouble, only the EBD is activated and the condition of the vehicle is the same condition of vehi-
cle without TCS/ABS equipment.
NOTE:
ABS self diagnosis sound may be heard. That is a normal condition because a self diagnosis for ?Ignition
switch ON? and ?The first starting? are being performed.
? For EBD trouble, the EBD and ABS become inoperative, and the condition of the vehicle is the same as
the condition of vehicles without TCS/ ABS, EBD equipment.
How to Proceed With Diagnosis NFS00045
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-102, "
ERASE MEMORY" .
? 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"
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Nissan 350Z Workshop Maunual 2006 (9) Summary of Content

BRC-86[VDC/TCS/ABS]TROUBLE DIAGNOSISRevision: 2005 August 2006 350ZTROUBLE DIAGNOSIS PFP:00004Fail-Safe Function NFS000IKVDC/TCS SYSTEMIn case of Throttle Control System trouble, the VDC OFF indicator lamp and SLIP indicator lamp are turnedon, and the condition of the vehicle is the same as the condition of vehicles without VDC/TCS equipment. Incase of trouble to the Throttle Control System, the ABS control continues to operate normally without VDC/TCS control.CAUTION:If the Fail-Safe function is activated, then perform the self diagnosis for VDC/TCS/ABS control system.ABS, EBD SYSTEMIn case of the electrical problems with the ABS, the ABS warning lamp, VDC OFF indicator lamp and SLIPindicator lamp will turn on. In case of the electrical problem with the EBD, brake warning lamp, ABS warninglamp, VDC OFF indicator lamp and SLIP indicator lamp will turn on. Simultaneously, the VDC/TCS/ABSbecome one of the following conditions of the Fail-Safe function. For ABS trouble, only the EBD is activated and the condition of the vehicle is the same condition of vehi-cle without TCS/ABS equipment.NOTE:ABS self diagnosis sound may be heard. That is a normal condition because a self diagnosis for Ignitionswitch ON and The first starting are being performed. For EBD trouble, the EBD and ABS become inoperative, and the condition of the vehicle is the same asthe condition of vehicles without TCS/ ABS, EBD equipment.How to Proceed With Diagnosis NFS00045BASIC CONCEPT Most important point to perform diagnosis is to understand systems (control and mechanism) in vehiclethoroughly. 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 withcustomer.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 torepair a malfunction completely.For an intermittent malfunction, it is important to reproducesymptom based on interview with customer and past examples.Do not perform inspection on ad hoc basis. Most intermittentmalfunctions are caused by poor contacts. In this case, it will beeffective to shake suspected harness or connector by hand.When repairs are performed without any symptom check, noone can judge if malfunction has actually been eliminated. After diagnosis, make sure to carry out erase memory. Refer toBRC-102, "ERASE MEMORY" . 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"SEF234GSEF233G