1998 ISUZU TROOPER Service Repair Manual

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Page 865 of 3573

ISUZU TROOPER 1998 Service Repair Manual 5A±55 BRAKE CONTROL SYSTEM
Chart B-23 RR Speed Sensor Short Circuit (DTC 64)
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector.
3. Measure the RR speed sensor resistance between EHC

Page 866 of 3573

ISUZU TROOPER 1998 Service Repair Manual 5A±56
BRAKE CONTROL SYSTEM
Chart B-24 Sensor Signal Input Abnormality (DTC 65)
StepActionYe sNo
1Using TECH 2?Go to Step 2Go to Step 3
21. Connect TECH 2.
2. Select Snap shot manual trigger.
3. With

Page 867 of 3573

ISUZU TROOPER 1998 Service Repair Manual 5A±57 BRAKE CONTROL SYSTEM
Unit Inspection Procedure
This section describes the following inspection
procedures referred to during ªSYMPTOM DIAGNOSISº
and ªDIAGNOSIS BY `ABS WARNING LIGHT
ILLUMIN

Page 868 of 3573

ISUZU TROOPER 1998 Service Repair Manual 5A±58
BRAKE CONTROL SYSTEM
Chart C-1-2 FR Sensor Output Inspection Procedure
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector.
3. Jack up the vehicle with all four wheels off the g

Page 869 of 3573

ISUZU TROOPER 1998 Service Repair Manual 5A±59 BRAKE CONTROL SYSTEM
Chart C-1-4 RR Sensor Output Inspection Procedure
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector.
3. Jack up the vehicle with all four wheels off the g

5A±59 BRAKE CONTROL SYSTEM
Chart C-1-4 RR Sensor Output Inspection Procedure
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector.
3. Jack up the vehicle with all four wheels off the ground.
Measure the AC voltage between EHCU connector terminals
while turning RR wheel at a speed of 1 RPS:
Is voltage between EHCU connector terminals 2 and 3 under 200
mV?
Go to Step 2
Ok.
Go to Step 3
21. Disconnect the wheel speed sensor.
2. Measure resistance between the wheel speed sensor
connector terminals 1 and 2.
Is resistance between connector (F-2) terminals 1 and 2 within
1.3k - 1.9k ohms?Connector is
faulty, or open or
short circuit of
harness between
wheel speed
sensor connector
and EHCU.
Inspect and
correct the
connector or
harness
Go to Step 3
Wheel speed
sensor is faulty.
Replace the
wheel speed
sensor.
Go to Step 3
3Reconnect all components and ensure all components are
properly mounted.
Was this step finished?Repeat the ªBasic
diagnostic flow
chart.º
Go to Step 3
Chart TC-1 Sensor Output Inspection Procedure (Use TECH 2)
StepActionYe sNo
11. Connect TECH 2.
2. While driving the vehicle, check the wheel speed of each
sensor by Data List.
Is the vehicle speed value is normal?
Go to Step 6Go to Step 2
2Check the sensor harness for suspected disconnection (Check
while shaking harness/connector).
Is the sensor harness connection normal?Replace speed
sensor.
Go to Step 3
Repair.
Go to Step 6
3While driving the vehicle, check the wheel speed of each sensor
by Data List.
Is the vehicle speed value is normal?
Go to Step 6Go to Step 4
4Check the sensor rotor.
Is the sensor rotor normal?
Go to Step 6
Replace sensor
rotor.
Go to Step 5
5While driving the vehicle, check the wheel speed of each sensor
by Data List.
Is the vehicle speed value is normal?
Go to Step 6
Repair harness or
connector
between EHCU
and speed
sensor.
Go to Step 6
6Reconnect all components, ensure all components are properly
mounted.
Was this step finished?Repeat the ªBasic
diagnostic flow
chart.º
Go to Step 6

Page 870 of 3573

ISUZU TROOPER 1998 Service Repair Manual 5A±60
BRAKE CONTROL SYSTEM
Chart C-2 Transmission Input Inspection Procedure
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector.
Is there continuity between EHCU connector terminals

Page 871 of 3573

ISUZU TROOPER 1998 Service Repair Manual 5A±61 BRAKE CONTROL SYSTEM
Chart TC-2 Transmission Input Inspection Procedure (Use TECH 2)
StepActionYe sNo
11. Connect TECH 2.
2. Select Data List.
Is this vehicle an A/T model ?
Go to Step 2Go to S

Page 872 of 3573

ISUZU TROOPER 1998 Service Repair Manual 5A±62
BRAKE CONTROL SYSTEM
Special Tools
ILLUSTRATIONTOOL NO.
TOOL NAME
5±8840±0385±0
(J±35616)
Connector test adapter
kit
5±8840±0366±0
(J±39200)
High impedance
multimeter
(1) PCMCIA Card
(2

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