1998 NISSAN PICK-UP Repair Manual

Self-diagnosis
FUNCTION
lWhen a problem occurs in the ABS, the warning lamp on the
instrument panel comes on. To start the self-diagnostic
results mode, ground the self-diagnostic (check) terminal
located on ``Data Link Connector for CONSULT''. The loca-
tion of the malfunction is indicated by the warning lamp flash-
ing.
SELF-DIAGNOSIS PROCEDURE
Drive vehicle over 30 km/h (19 MPH) for
at least one minute.
Turn ignition switch ``OFF''.
Ground terminal ``4'' of ``Data link con-
nector for CONSULT'' with a suitable
harness.
Turn ignition switch ``ON'' while ground-
ing terminal ``4''.
Do not depress brake pedal.
After 3.0 seconds, the warning lamp
starts flashing to indicate the malfunction
code No. (See NOTE.)
Verify the location of the malfunction
with the malfunction code chart. Refer to
BR-55. Then make the necessary
repairs following the diagnostic proce-
dures.
After the malfunctions are repaired,
erase the malfunction codes stored in
the control unit. Refer to BR-54.
Rerun the self-diagnostic results mode to
verify that the malfunction codes have
been erased.
Disconnect the check terminal from the
ground. The self-diagnostic results mode
is now complete.NOTE: The indication terminates
after five minutes.
However, when the ignition
switch is turned from
``OFF'' to ``ON'', the indica-
tion starts flashing again.
VA
SBR077E
SBR069E
SBR078E
.
.
.
.
.
.
.
.
.
TROUBLE DIAGNOSES
BR-53

VA
Check warning lamp for deactivation
after driving vehicle over 30 km/h (19
MPH) for at least one minute.
After making certain that warning lamp
does not come on, test the ABS in a
safe area to verify that it functions prop-
erly.
HOW TO READ SELF-DIAGNOSTIC RESULTS (Malfunction codes)
lDetermine the code No. by counting the number of times the warning lamp flashes on and off.
lWhen several malfunctions occur at one time, up to three code numbers can be stored; the latest mal-
function will be indicated first.
lThe indication begins with the start code 12. After that a maximum of three code numbers appear in the
order of the latest one first. The indication then returns to the start code 12 to repeat (the indication will
stay on for five minutes at the most).
lThe malfunction code chart is given on the next page.
HOW TO ERASE SELF-DIAGNOSTIC RESULTS
(Malfunction codes)
1. Disconnect the check terminal from ground (ABS warning
lamp will stay lit).
2. Within 12.5 seconds, ground the check terminal 3 times.
Each terminal ground must last more than 1 second. The
ABS warning lamp goes out after the erase operation has
been completed.
3. Perform self-diagnosis again. Refer to BR-53. Only the start-
code should appear, no malfunction codes.
SBR457D
ABR256
.
.
TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
BR-54

MALFUNCTION CODE/SYMPTOM CHART
Code No.
(No. of warning lamp flashes)Malfunctioning part Diagnostic procedure
45 Actuator front left outlet solenoid valve 2
46 Actuator front left inlet solenoid valve 2
41 Actuator front right outlet solenoid valve 2
42 Actuator front right inlet solenoid valve 2
55 Actuator rear outlet solenoid valve 2
56 Actuator rear inlet solenoid valve 2
25.3 Front left sensor (open-circuit) 1
26.3 Front left sensor (short-circuit) 1
21.3 Front right sensor (open-circuit) 1
22.3 Front right sensor (short-circuit) 1
35.1,.3 Rear sensor (open-circuit) 1
36.1,.3 Rear sensor (short-circuit) 1
31.2,.3 Rear right sensor (open-circuit) 1
32.2,.3 Rear right sensor (short-circuit) 1
35.2,.3 Rear left sensor (open-circuit) 1
36.2,.3 Rear left sensor (short-circuit) 1
18.3 Sensor rotor 1
17.2 G sensor and circuit 5
61.5 Actuator motor or motor relay 3
63 Solenoid valve relay 2
57.4 Power supply (Low voltage) 4
71 Control unit 6
Warning lamp stays on when igni-
tion switch is turned onControl unit power supply circuit
Warning lamp bulb circuit
Control unit or control unit connector
Solenoid valve relay stuck
Power supply for solenoid valve relay coil13
Warning lamp does not come on
when ignition switch is turned onFuse, warning lamp bulb or warning lamp circuit
Control unit12
Pedal vibration and noise Ð 11
Long stopping distance Ð 9
Unexpected pedal action Ð 8
ABS does not work Ð 10
ABS works frequently Ð 7
.1: 2WD model only
.2: 4WD model only
.3: If one or more wheels spin on a rough or slippery road for 40 seconds or more, the ABS warning lamp will illuminate. This does
not indicate a malfunction. Only in the case of the short-circuit (Code Nos. 26, 22, 32 and 36), after repair the ABS warning
lamp also illuminates when the ignition switch is turned ``ON''. In this case, drive the vehicle at speeds greater than 30 km/h (19
MPH) for approximately 1 minute as specified in ``SELF-DIAGNOSIS PROCEDURE'', BR-53. Check to ensure that the ABS
warning lamp goes out while the vehicle is being driven.
.4: The trouble code ``57'', which refers to a low power supply voltage, does not indicate that the ABS control unit is malfunctioning.
Do not replace the ABS control unit with a new one.
.5: The trouble code ``61'' can sometimes appear when the ABS motor is not properly grounded. If it appears, be sure to check the
condition of the ABS motor ground circuit connection.
TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
BR-55

CONSULT
CONSULT APPLICATION TO ABS
EE960 program card is not applicable to ABS. Use on board diagnostic system with ABS warning lamp until
the next program card will be introduced. (Refer to ``Self-diagnosis'', BR-53.)
ITEMSELF-DIAGNOSTIC
RESULTSDATA MONITOR ACTIVE TEST
Front right wheel sensor X X Ð
Front left wheel sensor X X Ð
Rear wheel sensor.1X X Ð
Rear right wheel sensor.2X X Ð
Rear left wheel sensor.2X X Ð
G switch (G sensor).2XXX
Stop lamp switch Ð X Ð
Front right inlet solenoid valve X X X
Front right outlet solenoid valve X X X
Front left inlet solenoid valve X X X
Front left outlet solenoid valve X X X
Rear inlet solenoid valve X X X
Rear outlet solenoid valve X X X
Actuator solenoid valve relay X X Ð
Actuator motor relay
(ABS MOTOR is shown on the Data Monitor
screen.)XXX
ABS warning lamp Ð X Ð
Battery voltage X X Ð
X : Applicable
Ð : Not applicable
.1: 2WD model only
.2: 4WD model only
ECU (ABS control unit) part number mode
Ignore the ECU part number displayed in the ECU PART NUMBER MODE. Refer to parts catalog to order
the ECU.
TROUBLE DIAGNOSES
BR-56

CONSULT Inspection Procedure
SELF-DIAGNOSIS PROCEDURE
1) Turn ignition switch OFF.
2) Connect CONSULT to Data Link Con-
nector for CONSULT.
1) Start engine.
2) Drive vehicle over 30 km/h (19 MPH)
for at least one minute.
1) Stop vehicle with engine running
and touch ``START'' on CONSULT
screen.
2) Touch ``ABS''.
3) Touch ``SELF-DIAG RESULTS''.
lThe screen shows the detected mal-
function and how many times the igni-
tion switch has been turned since the
malfunction.
Make the necessary repairs following the
diagnostic procedures.
After the malfunctions are repaired, erase
the self-diagnostic results stored in the
control unit by touching ``ERASE''.
Check warning lamp for deactivation after
driving vehicle over 30 km/h (19 MPH) for
at least one minute.
Test the ABS in a safe area to verify that
it functions properly.
Note: ``SELF-DIAG RESULTS'' screen shows the detected malfunction and
how many times the ignition switch has been turned since the mal-
function.
SBR079E
SBR455D
SBR080E
SST412B
SBR950C
.
.
.
.
.
.
TROUBLE DIAGNOSES
BR-57

SELF-DIAGNOSTIC RESULTS MODE
Diagnostic item Diagnostic item is detected when ...Diagnostic
procedure
FR RH SENSOR.1
[OPEN]
lCircuit for front right wheel sensor is open.
(An abnormally high input voltage is entered.)1
FR LH SENSOR.1
[OPEN]
lCircuit for front left wheel sensor is open.
(An abnormally high input voltage is entered.)1
RR SENSOR.1,.2
[OPEN]
lCircuit for rear sensor is open.
(An abnormal high input voltage is entered.)1
RR RH SENSOR.1,.3
[OPEN]
lCircuit for rear right sensor is open.
(An abnormally high input voltage is entered.)1
RR LH SENSOR.1,.3
[OPEN]
lCircuit for rear left sensor is open.
(An abnormally high input voltage is entered.)1
FR RH SENSOR.1
[SHORT]
lCircuit for front right wheel sensor is shorted.
(An abnormally low input voltage is entered.)1
FR LH SENSOR.1
[SHORT]
lCircuit for front left wheel sensor is shorted.
(An abnormally low input voltage is entered.)1
RR SENSOR.1,.2
[SHORT]
lCircuit for rear sensor is shorted.
(An abnormal low input voltage is entered.)1
RR RH SENSOR.1,.3
[SHORT]
lCircuit for rear right sensor is shorted.
(An abnormally low input voltage is entered.)1
RR LH SENSOR.1,.3
[SHORT]
lCircuit for rear left sensor is shorted.
(An abnormally low input voltage is entered.)1
ABS SENSOR.1
[ABNORMAL SIGNAL]
lTeeth damage on sensor rotor or improper installation of wheel sensor.
(Abnormal wheel sensor signal is entered.)1
FR RH IN ABS SOL
[OPEN]
lCircuit for front right inlet solenoid valve is open.
(An abnormally low output voltage is entered.)2
FR LH IN ABS SOL
[OPEN]
lCircuit for front left inlet solenoid valve is open.
(An abnormally low output voltage is entered.)2
RR IN ABS SOL
[OPEN]
lCircuit for rear inlet solenoid valve is open.
(An abnormally low output voltage is entered.)2
FR RH IN ABS SOL
[SHORT]
lCircuit for front right inlet solenoid valve is shorted.
(An abnormally high output voltage is entered.)2
FR LH IN ABS SOL
[SHORT]
lCircuit for front left inlet solenoid valve is shorted.
(An abnormally high output voltage is entered.)2
RR IN ABS SOL
[SHORT]
lCircuit for rear inlet solenoid valve is shorted.
(An abnormally high output voltage is entered.)2
FR RH OUT ABS SOL
[OPEN]
lCircuit for front right outlet solenoid valve is open.
(An abnormally low output voltage is entered.)2
FR LH OUT ABS SOL
[OPEN]
lCircuit for front left outlet solenoid valve is open.
(An abnormally low output voltage is entered.)2
RR OUT ABS SOL
[OPEN]
lCircuit for rear outlet solenoid valve is open.
(An abnormally low output voltage is entered.)2
FR RH OUT ABS SOL
[SHORT]
lCircuit for front right outlet solenoid valve is shorted.
(An abnormally high output voltage is entered.)2
FR LH OUT ABS SOL
[SHORT]
lCircuit for front left outlet solenoid valve is shorted.
(An abnormally high output voltage is entered.)2
RR OUT ABS SOL
[SHORT]
lCircuit for rear outlet solenoid valve is shorted.
(An abnormally high output voltage is entered.)2
ABS ACTUATOR RELAY
[ABNORMAL]
lActuator solenoid valve relay is ON, even if control unit sends off signal.lActuator solenoid valve relay is OFF, even if control unit sends on signal.2
ABS MOTOR RELAY
[ABNORMAL]
lCircuit for ABS motor relay is open or shorted.lCircuit for actuator motor is open or shorted.lActuator motor relay is stuck.3
BATTERY VOLT
[VB-LOW]
lPower source voltage supplied to ABS control unit is abnormally low. 4
CONTROL UNIT
lFunction of calculation in ABS control unit has failed. 6
G-SENSOR.3
[ABNORMAL]
lG sensor circuit is open or shorted. 5
.1: If one or more wheels spin on a rough or slippery road for 40 seconds or more, the ABS warning lamp will illuminate. This
does not indicate a malfunction. Only in the case of the short-circuit (Code Nos. 26, 22, 32 and 36), after repair the ABS warn-
ing lamp also illuminates when the ignition switch is turned ``ON''. In this case, drive the vehicle at speeds greater than 30 km/h
(19 MPH) for approximately 1 minute as specified in ``SELF-DIAGNOSIS PROCEDURE'', BR-53. Check to ensure that the ABS
warning lamp goes out while the vehicle is being driven.
.2: 2WD model only
.3: 4WD model only
TROUBLE DIAGNOSES
CONSULT Inspection Procedure (Cont'd)
BR-58

DATA MONITOR PROCEDURE
1) Turn ignition switch OFF.
2) Connect CONSULT to Data Link Connector for CONSULT.
3) Turn ignition switch ON.
1) Touch ``START'' on CONSULT screen.
2) Touch ``ABS''.
3) Touch ``DATA MONITOR''.
1) Touch ``SETTING'' on ``SELECT MONITOR ITEM'' screen.
2) Touch ``LONG TIME'' on ``SET RECORDING COND'' screen.
3) Touch ``START'' on ``SELECT MONITOR ITEM''.
SBR455D
SBR080E
SST412B
SBR936C
SBR937C
.
.
TROUBLE DIAGNOSES
CONSULT Inspection Procedure (Cont'd)
BR-59

ACTIVE TEST PROCEDURE
lWhen conducting Active test, vehicle must be stationary.
lWhen ABS warning lamp stays on, never conduct Active test.
1) Turn ignition switch OFF.
2) Connect CONSULT to Data Link Connector for CONSULT.
3) Start engine.
1) Touch ``START'' on CONSULT screen.
2) Touch ``ABS''.
3) Touch ``ACTIVE TEST''.
1) Select active test item by touching screen.
2) Touch ``START''.
Carry out the active test by touching screen key.
SBR455D
SBR080E
SST412B
SBR857D
SBR934C
.
.
.
TROUBLE DIAGNOSES
CONSULT Inspection Procedure (Cont'd)
BR-60