Nissan 350Z Workshop Manual 2003 (9) PDF | Page 30

BRC-30
[ABS]
TROUBLE DIAGNOSIS
Correct and Quick Diagnosis
AFS0011B
DIAGNOSIS PRECAUTIONS
? Before performing the trouble diagnosis, always read the general information (GI) to confirm the general
precautions. Refer to
? After completing service, always erase the self-diagnosis results. Refer to BRC-21, "CONSULT- II Func-
tions" .
? When inspection of the continuity or voltage between units is performed, check connector terminals for
disconnection, looseness, bend, or collapse. If any non-standard condition is detected, repair or replace
applicable part.
? Intermittent errors may be caused by a poor connection in the harness, connector, or terminal. Move har-
nesses, harness connectors, or terminals by hand to make sure all connections are solid and undamaged.
? If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.
? ABS is a system that uses electronic control to perform brake control and engine power control. There-
fore, phenomena like those shown in the following table may occur, but this is because the system is
working normally.
ABS Warning Lamp, TCS OFF Indicator Lamp, SLIP Indicator Lamp On/Off Timing
: ON ?: OFF
: Applicable
?: Not applicable
Symptom Symptom description Result
Motor operation noise
This is the sound of the motor operating inside ABS actuator, and there
may be some low sounds while the TCS or ABS is operating.
Normal
Just after the engine starts, the motor operating noise may be heard.
This is a normal status of the system operation check.
System operation check
noise
When the engine is started, you may barely be able to hear a slight
thudding sound from the engine room, but this sound is made by the
system operation check and is normal.
Normal
ABS operation (longer stop-
ping distance)
Stopping distance may be longer for vehicles with ABS when the vehicle
drives on rough or snow-covered roads. Use lower speeds when driving
on these kinds of roads.
Normal
Condition ABS warning lamp Remarks
Ignition switch OFF ? ?
For approximately ?1? second after ignition switch
ON
?
After approximately ?1? second after ignition
switch ON. (When system is normal)
? Turns off 2 second after engine start
ABS error
When there is an ABS actuator and electric unit
error (power or ground error)

Nissan 350Z Workshop Manual 2003 (9) Summary of Content

BRC-30[ABS]TROUBLE DIAGNOSISCorrect and Quick DiagnosisAFS0011BDIAGNOSIS PRECAUTIONS Before performing the trouble diagnosis, always read the general information (GI) to confirm the generalprecautions. Refer to After completing service, always erase the self-diagnosis results. Refer to BRC-21, "CONSULT- II Func-tions" . When inspection of the continuity or voltage between units is performed, check connector terminals fordisconnection, looseness, bend, or collapse. If any non-standard condition is detected, repair or replaceapplicable part. Intermittent errors may be caused by a poor connection in the harness, connector, or terminal. Move har-nesses, harness connectors, or terminals by hand to make sure all connections are solid and undamaged. If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal. ABS is a system that uses electronic control to perform brake control and engine power control. There-fore, phenomena like those shown in the following table may occur, but this is because the system isworking normally.ABS Warning Lamp, TCS OFF Indicator Lamp, SLIP Indicator Lamp On/Off Timing: ON : OFF: Applicable: Not applicableSymptom Symptom description ResultMotor operation noiseThis is the sound of the motor operating inside ABS actuator, and there may be some low sounds while the TCS or ABS is operating.NormalJust after the engine starts, the motor operating noise may be heard. This is a normal status of the system operation check.System operation check noiseWhen the engine is started, you may barely be able to hear a slight thudding sound from the engine room, but this sound is made by the system operation check and is normal.NormalABS operation (longer stop-ping distance)Stopping distance may be longer for vehicles with ABS when the vehicle drives on rough or snow-covered roads. Use lower speeds when driving on these kinds of roads.NormalCondition ABS warning lamp RemarksIgnition switch OFF For approximately 1 second after ignition switch ON After approximately 1 second after ignition switch ON. (When system is normal) Turns off 2 second after engine startABS error When there is an ABS actuator and electric unit error (power or ground error)