Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 687
5A–44
BRAKE CONTROL SYSTEM
Chart C-2 Transmission Input Inspection Procedure
Step
Action
Yes
No
1
1. Turn the key off.
2. Disconnect EHCU connector.
Is there continuity between EHCU connector terminals 6 and 15
(Gear position-P(A/T), N(M/T))?
Shorted switch
harness.
Repair switch or
harness.
Go to Step 6
Go to Step 2
2
Is the vehicle an A/T model?
Go to Step 3
Go to Step 4
3
Turn the key on and measure voltage between EHCU connector
terminals 6 and 15.
Is there less than 6V when the gear position is L, and R(Battery
voltage 12V)?
Go to Step 5
Transmission SW
trouble.
Disconnected
harness.
Repair SW and
harness.
Go to Step 6
4
Turn the key on and measure the voltage between EHCU
connector terminal 6 and 15.
Is there more than 9.6V when the gear position is 1, 2, R(Battery
voltage 12V)?
Go to Step 5
Transmission SW
trouble.
Disconnected
harness.
Repair SW and
harness.
Go to Step 6
5
Measure the voltage between EHCU connector terminals 6 and
15.
Is there 6.6 to 9.0V when the gear position is 3, 4, 5 and N(M/T) or
2,3,D,N and P(A/T)(Battery voltage 12V)?
Go to Step 6
Transmission SW
trouble.
Disconnected
harness.
Repair SW and
harness.
Go to Step 6
6
1. Reconnect all components and ensure all components are
properly mounted.
2. Clear diagnostic trouble code.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart.”
Go to Step 6
5A–45
BRAKE CONTROL SYSTEM
Chart TC-2 Transmission Input Inspection Procedure (Use TECH 2)
Step
Action
Yes
No
1
1. Connect TECH 2.
2. Select Data List.
Is this vehicle an A/T model ?
Go to Step 2
Go to Step 4
2
Is “Off–Road Switch(Transmission Input): Active” when the shift
lever is the L and R?
Go to Step 3
Go to Step 6
3
Is “Off–Road Switch(Transmission Input): Inactive” when the shift
lever is other than the L and R?
Go to Step 7
Go to Step 6
4
Is “Off–Road Switch(Transmission Input): Active” when the shift
lever is in 1, 2 and R?
Go to Step 5
Go to Step 6
5
Is “Off–Road Switch(Transmission Input): Inactive” when the shift
lever is other than the 1, 2 and R?
Go to Step 7
Go to Step 6
6
1. Abnormal T/M SW, inhibitor SW, or harness.
2. Repair T/M SW, inhibitor SW, or harness.
Is the T/M SW, inhibitor SW, or harness repaired?
Go to Step 7
Go to Step 6
7
Reconnect all components, ensure all components are properly
mounted.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart.”
Go to Step 7
5A–46
BRAKE CONTROL SYSTEM
Special Tools
ILLUSTRATION
TOOL NO.
TOOL NAME
J–35616
Connector test adapter
kit
J–39200
High impedance
multimeter
7000086–ISU
Tech 2 Set
(1) PCMCIA Card
(2) SAE 16/19 Adapter
(3) DLC Cable
(4) Tech 2
5B–1
ANTI–LOCK BRAKE SYSTEM
TROOPER
BRAKES
ANTI-LOCK BRAKE SYSTEM
CONTENTS
Service Precaution
5B–1
. . . . . . . . . . . . . . . . . . . . . .
Electronic Hydraulic Control Unit
5B–2
. . . . . . . . . .
Electronic Hydraulic Control Unit and
Associated Parts
5B–2
. . . . . . . . . . . . . . . . . . . . . .
Removal
5B–2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
5B–2
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
G-Sensor
5B–3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal
5B–3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair
5B–3
. . . . . . . . . . . . . . . . . .
Installation
5B–3
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Wheel Speed Sensor
5B–4
. . . . . . . . . . . . . . .
Front Wheel Speed Sensor and
Associated Parts
5B–4
. . . . . . . . . . . . . . . . . . . . . .
Removal
5B–4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair
5B–5
. . . . . . . . . . . . . . . . . .
Installation
5B–5
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Wheel Speed Sensor
5B–6
. . . . . . . . . . . . . . .
Rear Wheel Speed Sensor and
Associated Parts
5B–6
. . . . . . . . . . . . . . . . . . . . . .
Removal
5B–6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair
5B–6
. . . . . . . . . . . . . . . . . .
Installation
5B–6
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.
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