key ISUZU TROOPER 1995 Service Manual

• WITH THE KEY TURNED OFF, CONNECT PINOUT BOX
• CHECK CONTINUITY BETWEEN PINOUT BOX TERMINAL 16 AND 10 (GEAR POSITION-N)
I
l I NO CONTINUITY I
I CONTINUITY I
I I TURN THE KEY ON AND MEASURE THE VOLTAGE BETWEEN I . SHORTED SWITCH/HARNESS I PINOUT BOX TERMINAL 16 AND 20 WITH REFERENCE TO
• REPAIR SWITCH OR HARNESS
THE TABLE BELOW:
I SHIFT POSITION I 1, 2, R OTHER THAN 1, 2, R I
I
VOLTAGE I 11.5-14.5V ov I
I
I
I NOT AS SPECIFIED I AS SPECIFIED I
l I • TRANSMISSION SW . SUSPECTED HARNESS/CONNECTOR
TROUBLE SHORT TO POWER SOURCE/GND . DISCONNECTED HARNESS • SUSPECTED SHORTED TRANSMISSION SW • REPAIR SW AND HARNESS • FAULT FOUND: REPAIR, AND PERFORM SYSTEM
SELF-CHECK
• NO FAULT FOUND: REPLACE EBCM

5A4-58 4-WHEEL ANTILOCK BRAKE SYSTEM (ABS)
CHART B-8 I):Eeti((l
HYDRAULIC UNIT (HU) PUMP MOTOR AND MOTOR RELAY CIRCUIT ~
(DIAGNOSTIC TROUBLE CODE 32)
• WITH THE KEY TURNED OFF, CONNECT PINOUT BOX
• MEASURE RESISTANCE BETWEEN TERMINALS 17 AND28
I 70n-9on I I OTHER THAN 70n-9on I
I
CHECK CONTINUITY BETWEEN TERMINAL 141 AND10 I MEASURE RESISTANCE BETWEEN HU CONNECTORS I C34-6 AND C34-11
I
I I I
CONTINUITY j NO CONTINUITY j 1 70(l-9ooJ I OTHER THAN 70n-9on I
I I I REMOVE HU CONNECTOR CHECK CONTINUITY I REPAIR HARNESS BB07 I I REPLACE HU I AND CHECK CONTINUITY BETWEEN HU OR BB08 BETWEEN PINOUT BOX
CONNECTOR C33-3 TERMINAL 14 AND 10 AND BODY GROUND
I
I
I CONTINUITY I NO CONTINUITY j
I I REPAIR HARNESS BB27, BB06 (OPEN) I • CHECK FOR MOTOR GROUND • FAULT FOUND: REPAIR GROUND
I • NO FAULT FOUND: REPLACE HU
NO CONTINUITY I CONTINUITY J
I MEASURE VOLTAGE REPAIR HARNESS
BETWEEN HU CONNECTOR BB06, BB27
(GND
C33-2 AND BODY GROUND SHORT)
BATTERYVOLTAGE I $
. MOTOR RELAY REPAIR FUSE/HARNESS BETWEEN I ABNORMAL BATTERY AND C33-2/CONNECTOR • REPLACE HU
•

4-WHEEL ANTILOCK BRAKE SYSTEM (ABS) 5A4-59
CHART B-9 [JEeft:(l
SOLENOID VALVE ABNORMALITY (DIAGNOSTIC TROUBLE CODE 41,42 & 44)
• WITH THE KEY TURNED OFF, CONNECT PINOUT BOX
• MEASURE THE FOLLOWING TERMINAL RESISTANCE
ACCORDING TO THE SPECIFIC DIAGNOSTIC TROUBLE CODE STORED:
CODE 41 (FL SOLENOID VALVE)
BETWEEN PINOUT BOX TERMINALS 2 AND 32 CODE 42 IFR SOLENOID VALVE)
BETWEEN PINOUT BOX TERMINALS 35 AND 32 CODE 44 (REAR SOLENOID VALVE)
BETWEEN PINOUT BOX 18 AND 32
I
I
I OTHER THAN 0.6-1.8n I 0.6·1.Bn I
I I
MEASURE SOLENOID VALVE RESISTANCE: . CHECK FOR FAULTS IN HARNESS BETWEEN CODE 41 (FL SOLENOID VALVE) HYDRAULIC UNIT AND EBCM
BETWEEN C34-4 AND C34-7
FAULT FOUND: REPAIR, AND PERFORM CODE 42 (FR SOLENOID VALVE) SYSTEM SELF-CHECK BETWEEN C34-3 AND C34-7 • NO FAULT FOUND: REPLACE EBCM
CODE 44 (REAR SOLENOID VALVE)
BETWEEN C34-2 AND C34-7
l
I I OTHER THAN 0.6-1.8n I o.s-1.Bn I _L I REPLACE HYDRAULIC UNITj REPAIR HARNESS OR CONNECTOR I BETWEEN HYDRAULIC UNIT AND EBCM

5A4-60 4-WHEEL ANTILOCK BRAKE SYSTEM (ABS)
CHART B-1 0 [):Ee@]
VALVE RELAY ABNORMALITY (DIAGNOSTIC TROUBLE CODE 45) ~
• WITH THE KEY TURNED OFF, CONNECT PINOUT BOX
• MEASURE RESISTANCE BETWEEN THE TERMINALS 17 AND 27
I 1s-12oo 1 I OTHER THAN 75-1200 J
I
CHECK CONTINUITY
BETWEEN TERMINAL 32 J AND10 I_ REMOVE HU CONNECTOR AND MEASURE I RESISTANCE BETWEEN C34-6 AND C34-10
I
I
I I
CONTINUITY I
NO CONTINUITY/ I75-120n/ I OTHERS I
I I
I
MEASURE
VOLTAGE CHECK CONTINUITY I REPAIR HARNESS/ J I REPLACE HU I
BETWEEN HU HARNESS BETWEEN C34-7 AND CONNECTOR
C33-1 TO BODY GROUND C34-12 ON THE VEHICLE SIDE I
I I CONTINUITY I l NO CONTINUITY I
I I
CHECK CONTINUITY VEHICLE-SIDE
,. HU IS FAULTY J HU CONNECTOR C34-12 AND BODY • REPLACE
HU GROUND
I
I I
CONTINUITY j I NO CONTINUITY I
I I • HARNESS BB12 l REPAIR HARNESS BY02 I OPEN
• REPAIR HARNESS
I BATTERY VOLTAGE j OTHER I
I
• HU VALVE RELAY I REPAIR HARNESS /FUSE BETWEEN I TROUBLE BATTERY AND HU • REPLACE HU
~1111 .. 1 2 3 4 5 617 8 9 101112 =
•

4-WHEEL ANTILOCK BRAKE SYSTEM (ABS) 5A4-61
CHART B-11 [tE€f((]
SPEED SENSOR DISCONNECTION (DIAGNOSTIC TROUBLE CODE 51, 52, 53, & 54)
• WITH THE KEY TURNED OFF, CONNECT PINOUT BOX
• MEASURE THE FOLLOWING TERMINAL RESISTANCE
ACCORDING TO THE SPECIFIC DIAGNOSTIC TROUBLE
CODE STORED
CODE
51 (FL SENSOR) BETWEEN PINOUT BOX TERMINALS 4 AND 22 CODE 52 (FR SENSOR) BETWEEN PINOUT BOX TERMINALS 21 AND 23 CODE 53 (RL SENSOR) BETWEEN PINOUT BOX TERMINALS 8 AND 9 CODE 54 (RR SENSOR) BETWEEN PINOUT BOX TERMINALS 24 AND 26
I
l I 0.8K-1.3Kn I OTHER I
l I • CHECK FOR FAULTS IN HARNESS BETWEEN MEASURE EACH SENSOR RESISTANCE AT I SPEED SENSOR AND EBCM THE SENSOR CONNECTOR
• FAULT FOUND: REPAIR, AND PERFORM I SYSTEM SELF-CHECK I I • NO FAULT FOUND: REPLACE EBCM o.BK-1.3Kn I l OTHER j
I I REPAIR HARNESS I REPLACE SENSOR I ABNORMALITY BETWEEN SENSORS AND EBCM

5A4-62 4-WHEEL ANTILOCK BRAKE SYSTEM (ABS)
CHART B-12 tJEe©]
SPEED SENSOR SHORT CIRCUIT (DIAGNOSTIC TROUBLE CODE 61, 62, 63, & 64) ~
WITH THE KEY TURNED OFF, CONNECT PINOUT BOX
MEASURE THE FOLLOWING TERMINAL RESISTANCE
ACCORDING TO THE SPECIFIC DIAGNOSTIC TROUBLE CODE STORED:
CODE 61 (FL SENSOR) BETWEEN PINOUT BOX TERMINALS 4 AND 22 CODE 62 IFR SENSOR) BETWEEN PINOUT BOX TERMINALS 21 AND 23 CODE 63 IRL SENSOR) BETWEEN PINOUT BOX TERMINALS 8 AND 9 CODE 64 (RR SENSOR) BETWEEN PINOUT BOX TERMINALS 24 AND 26
DAMAGE
AND POWERED IRON STICKING TO SENSOR/SENSOR RING?
CHECK FOR FAULTS IN
HARNESS BETWEEN SPEED SENSOR AND EBCM
FAULT FOUND: REPAIR, AND PERFORM SYSTEM SELF-CHECK NO FAULT FOUND:
REPLACE EBCM
REPAIR HARNESS BETWEEN SENSORS AND EBCM
•

CHART B-13, TB-13 l)EeR:[I I TECH 1 I
SENSOR SIGNAL INPUT ABNORMALITY (DIAGNOSTIC TROUBLE CODE 65)
SELECT F3: SNAP SHOT MANUAL TRIGGER
WITH
WHEEL SPEED DATA DISPLAYED, RUN THE *1 VEHICLE WHEN SPEED HAS ARRIVED AT 30 KM/H
(18 MPH), PRESS F9 KEY
CHECK SPEED DATA ON EACH WHEEL (REFER TO THE CRITERIAL GIVEN BELOW)
ONLY THE ABNORMAL WHEEL SHOULD
FOLLOW THE NEXT FLOWCHART
IS THERE PLAY IN SENSOR/SENSOR ROTOR? -I)Eel{[l ALL THE WHEELS SHOULD FOLLOW THE FOLLOWING FLOWCHART
IS THERE POWDERED IRON STICKING
TO SENSOR/SENSOR ROTOR?
cill
~
Sensor Signal Abnormality Criteria using TECH 1 --------,
1) While driving, the speed of one or two wheels is 25% or more higher than that of
the other wheels.
2) The speed of one or two wheels is 10 km/h (6 mph) or more higher than that of the
other
wheels.
3) During steady driving, wheel speed changes abruptly.
* 1 The vehicle must run on a level paved road.

5A4-66 4-WHEEL ANTILOCK BRAKE SYSTEM (ASS)
CHART C-2
SENSOR
OUTPUT INSPECTION PROCEDURE
• TURN THE KEY OFF AND CONNECT PINOUT BOX
• JACK UP THE VEHICLE WITH ALL FOUR WHEELS OFF THE GROUND . MEASURE THE AC VOLTAGE BERWEEN PINOUT BOX TERMINALS
WHILE TURNING EACH WHEEL AT A SPEED OF 1 RPS:
-FLWHEEL BETWEEN TERMINALS 4 AND 22
I
-FR WHEEL
BETWEEN TERMINALS 21 AND 23
-RL WHEEL BETWEEN TERMINALS 8 AND 9
-RR WHEEL BETWEEN TERMINALS 24 AND 26
I UNDER 200 mV I OVER 200 mV J
0
DISCONNECT THE WHEEL SPEED SENSOR
• MEASURE RESISTANCE BETWEEN THE WHEEL SPEED SENSOR
CONNECTOR:
-FLWHEEL BETWEEN TERMINALS C13-1 AND C13-2 -FR WHEEL
BETWEEN TERMINALS C41-1 AND C41-2 -RLWHEEL BETWEEN TERMINALS F3-1 AND F3-2
- RRWHEEL
BETWEEN
TERMINALS F2-1 AND F2-2
I OUTSIDE 0.8K-1.3Kn I 0.8K-1.3KO j
I • WHEEL SPEED SENSOR IS FAULTY I CONNECTOR IS FAUL TV. OR OPEN OR • REPLACE THE WHEEL SPEED SENSOR SHORT
CIRCUIT OF HARNESS BETWEEN
WHEEL SPEED SENSOR CONNECTOR ANDEBCM
I
INSPECT AND CORRECT THE CONNECTOR I OR HARNESS
•

5A4-68 4-WHEEL ANTILOCK BRAKE SYSTEM (ABS)
CHART C-3 [@f((l
4WD SWITCH INSPECTION PROCEDURE
WITH THE KEY TURNED OFF, CONNECT PINOUT BOX
I TURN THE KEY ON I
MEASURE THE VOLTAGE BETWEEN THE TERMINALS 15 AND 20 IN THE FOLLOWING T/F LEVER POSITIONS:
T!F LEVER POSITION STANDARD VOLTAGE
2H 12V
4H ov
4L ov
l OTHER THAN STANDARD j AS STANDARD I
clJ
CHECK CONTINUITY BETWEEN 4WD SW CONNECTOR M11-1 AND M12-1
I
2H
I
NO CONTINUITY
I 4L, 4H CONTINUITY
$ $
REPLACE 4WD sw I REPAIR CONNECTOR OR HARNESS BETWEEN CONNECTOR C4-15 AND C16-3
Ill

5A4-70 4-WHEEL ANTILOCK BRAKE SYSTEM (ABS)
CHART C-4
TRANSMISSION INPUT INSPECTION
PROCEDURE (A/T MODEL)
. TURN THE KEY OFF, CONNECT THE PINOUT BOX . TURN THE KEY ON
• CHECK CONTINUITY BETWEEN THE PINOUT BOX TERMINAL 16 AND 20
SHIFT POSITION
p R N
D 2 L
CONTINUITY: 0 X 0 X
X X 0 NO CONTINUITY: X
$
@
I NG IN ·p·, ·w, "D" OR ·2· RANGE j I NG IN "R" OR "L" RANGE I
I • TURN
THE KEY OFF ! • TURN THE KEY OFF . WITH A!T CONTROLLER CONNECTOR
1.
WITH AfT CONTROLLER
CONNECTOR
REMOVED, CHECK 16 AND 20 REMOVED,
CHECK 16 AND A!T CONTINUITY CONTROLLER CONNECTOR B10 I CONTINUITY
I
~ $ $ $
. HARNESS SHORT I" CHECKA/T I I" CHECK AfT I
•
DISCONNECTED TOGND CONTROLLER
CONTROLLER HARNESS
• REPAIR HARNESS
• REPAIR HARNESS
r--I
p I In_ -,
A1 A2 .... .... ., .. .. ... A11 A12 81 12 13 .... .,. 19 810 111817
...:....:.r-,..,
•