Infiniti G20 (P11). Manual — part 118
Diagnostic item
Diagnostic item is detected when ...
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RR RH OUT ABS SOL
[SHORT]
I
Circuit for rear right outlet solenoid valve is shorted.
(An abnormally high output voltage is entered.)
RR LH OUT ABS SOL
[SHORT]
I
Circuit for rear left outlet solenoid valve is shorted.
(An abnormally high output voltage is entered.)
ABS ACTUATOR RELAY
[ABNORMAL]
I
Actuator solenoid valve relay is ON, even control unit sends off signal.
I
Actuator solenoid valve relay is OFF, even control unit sends on signal.
ABS MOTOR RELAY
[ABNORMAL]
I
Circuit for actuator motor is open or shorted.
I
Actuator motor relay is stuck.
BATTERY VOLT
[ABNORMAL]
I
Power source voltage supplied to ABS control unit is abnormally low.
CONTROL UNIT
I
Function of calculation in ABS control unit has failed.
*1: Be sure to confirm the ABS warning lamp illuminates when the ignition switch is turned ON after repairing the shorted sensor circuit,
but the lamp goes out when driving the vehicle over 30 km/h (19 MPH) for one minute in accordance with SELF-DIAGNOSIS
PROCEDURE.
PBR455D
DATA MONITOR PROCEDURE
NCBR0093S03
1.
Turn ignition switch OFF.
2.
Connect CONSULT-II to data link connector.
3.
Turn ignition switch ON.
4.
Touch “START” on CONSULT-II screen.
PBR385C
5.
Touch “ABS”.
PST412B
6.
Touch “DATA MONITOR”.
7.
Touch “SETTING” on “SELECT MONITOR ITEM” screen.
8.
Touch “LONG TIME” on “SET RECORDING COND” screen.
9.
Touch “START” on “SELECT MONITOR ITEM”.
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
ST
RS
BT
HA
SC
EL
IDX
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ABS
CONSULT-II Inspection Procedure (Cont’d)
BR-47
PBR455D
ACTIVE TEST PROCEDURE
NCBR0093S04
I
When conducting Active test, vehicle must be stationary.
I
When ABS warning lamp stays on, never conduct Active test.
1.
Turn ignition switch OFF.
2.
Connect CONSULT-II to data link connector.
3.
Start engine.
4.
Touch “START” on CONSULT-II screen.
PBR385C
5.
Touch “ABS”.
PST412B
6.
Touch “ACTIVE TEST”.
PBR976C
7.
Select active test item by touching screen.
PBR934C
8.
Touch “START”.
9.
Carry out the active test by touching screen key.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ABS
CONSULT-II Inspection Procedure (Cont’d)
BR-48
DATA MONITOR MODE
NCBR0093S05
MONITOR ITEM
CONDITION
SPECIFICATION
FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSOR
Drive vehicle.
(Each wheel is rotating.)
Displays computed vehicle speed from wheel sensor signal.
Almost the same speed as speedometer.
STOP LAMP SW
Turn ignition switch ON and
depress brake pedal.
Depress the pedal: ON
Release the pedal: OFF
FR RH IN SOL
FR RH OUT SOL
FR LH IN SOL
FR LH OUT SOL
RR IN SOL
RR OUT SOL
RL IN SOL
RL OUT SOL
Ignition switch is turned ON or
engine is running.
Operating conditions for each solenoid valve are indicated.
ABS is not operating: OFF
ACTUATOR RLY
Ignition switch is turned ON or
engine is running.
Displays ON/OFF condition of ABS actuator relay.
When turning ignition switch ON, ABS actuator relay is oper-
ated.
MOTOR RELAY
ABS is not operating: OFF
ABS is operating: ON
WARNING LAMP
Warning lamp is turned on: ON
Warning lamp is turned off: OFF
BATTERY VOLT
Power supply voltage for control unit
ACTIVE TEST MODE
NCBR0093S06
TEST ITEM
CONDITION
JUDGEMENT
FR RH SOLENOID
FR LH SOLENOID
RR RH SOLENOID
RR LH SOLENOID
Ignition switch is turned ON.
Brake fluid pressure control operation
IN SOL
OUT SOL
UP (Increase):
OFF
OFF
KEEP (Hold):
ON
OFF
DOWN (Decrease):
ON
ON
ABS MOTOR
ABS actuator motor
ON: Motor runs
OFF: Motor stops
NOTE:
Active test will automatically stop ten seconds after the test starts. (TEST IS STOPPED monitor shows ON.)
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
ST
RS
BT
HA
SC
EL
IDX
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ABS
CONSULT-II Inspection Procedure (Cont’d)
BR-49
SEF233G
SEF234G
How to Perform Trouble Diagnoses for Quick
and Accurate Repair
NCBR0094
INTRODUCTION
NCBR0094S01
The ABS system has an electronic control unit to control major
functions. The control unit accepts input signals from sensors and
instantly drives actuator. It is essential that both kinds of signals are
proper and stable. It is also important to check for conventional
problems: such as air leaks in the booster or lines, lack of brake
fluid, or other problems with the brake system.
It is much more difficult to diagnose a problem that occurs intermit-
tently rather than continuously. Most intermittent problems are
caused by poor electric connections or faulty wiring. In this case,
careful checking of suspicious circuits may help prevent the
replacement of good parts.
A visual check only may not find the cause of the problems, so a
road test should be performed.
Before undertaking actual checks, take just a few minutes to talk
with a customer who approaches with a ABS complaint. The cus-
tomer is a very good source of information on such problems;
especially intermittent ones. Through the talks with the customer,
find out what symptoms are present and under what conditions
they occur.
Start your diagnosis by looking for “conventional” problems first.
This is one of the best ways to troubleshoot brake problems on an
ABS controlled vehicle. Also check related Service Bulletins for
information.
TROUBLE DIAGNOSIS — INTRODUCTION
ABS
How to Perform Trouble Diagnoses for Quick and Accurate Repair
BR-50
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