lock ISUZU TROOPER 1995 Workshop Manual

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
•

5A4 -64 4-WHEEL ANTILOCK BRAKE SYSTEM (ABS)
UNIT INSPECTION PROCEDURE
This section describes the following inspection procedures referred to during "SYMPTOM DIAGNOSIS" and
"DIAGNOSIS BY 'ABS' WARNING LIGHT ILLUMINATION PATTERN":
without TECH 1 with TECH 1
G-sensor
Unit Inspection Chart C-1 -
Sensor Output Inspection Chart C-2 Chart TC-2
Transfer
SW Inspection Chart C-3 Chart TC-3
Transmission
SW Inspection Chart C-4 Chart TC-4
•

4-WHEEL ANTILOCK BRAKE SYSTEM (ABS) 5A4-65
CHART C-1
G-SENSOR UNIT INSPECTION PROCEDURE
REMOVE G-SENSOR FROM THE VEHICLE
• DISCONNECT
THE G-SENSOR CONNECTOR 825 • MEASURE RESISTANCE 8ElWEEN G-SENSOR CONNECTOR 825-1 TO 825-2 UNDER THE FOLLOWING CONDITIONS:
CONDITION
G-SENSOR
PLACED HORIZONTAL
G-SENSOR TILTED
TO 30°
OR MORE
VEHICLE ...........
FRONT
~
STANDARD G-SENSOR ON/OFF
1000 OR LESS ON
100kn OR MORE OFF
30°
OR MORE
[)EeH:(I

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
•

4-WHEEL ANTILOCK BRAKE SYSTEM (ABS) 5A4-67
CHARTTC-2
SENSOR OUTPUT INSPECTION PROCEDURE
CHECK THE MINIMUM SPEED OF EACH SENSOR BY MODE F6: WHEEL SENSORS (REFER TOP. 5A4-31)
REPLACE
WITH NEW SENSORS AND RECHECK SENSOR OUTPUT CONDITIONS BY MODE F6: WHEEL SENSORS
CHECK THE
SENSOR HARNESS FOR SUSPECTED
DISCONNECTION (CHECK WHILE SHAKING HARNESS/CONNECTOR)
REPLACE
WITH NEW SENSOR ROTOR AND CHECK ONCE AGAIN THE OUTPUT CONDITIONS OF SENSORS WITH MODE F6: WHEEL SENSORS
I TECH 1 I

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