Isuzu 1999 RODEO Workshop Manual page 376

RODEO
Brake Control System . . . . . . . . . . . . . . . . . . . .
Anti-lock Brake System . . . . . . . . . . . . . . . . . .
Power-assisted Brake System
Parking Brakes (4x4 Model)
Parking Brakes (4x2 Model)
Service Precaution . . . . . . . . . . . . . . . . . . . . . .
General Description . . . . . . . . . . . . . . . . . . . . .
Functional Description
System Components . . . . . . . . . . . . . . . . . . .
Electronic Hydraulic Control Unit (EHCU)
ABS Warning Light . . . . . . . . . . . . . . . . . . . .
Wheel Speed Sensor . . . . . . . . . . . . . . . . . .
G-Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal and Anti-lock Braking
Brake Pedal Travel . . . . . . . . . . . . . . . . . . . .
Acronyms and Abbreviations
General Diagnosis . . . . . . . . . . . . . . . . . . . . . . .
General Information . . . . . . . . . . . . . . . . . . . .
ABS Service Precautions
Computer System Service Precautions
General Service Precautions
Note on Intermittents . . . . . . . . . . . . . . . . . . .
Test Driving ABS Complaint Vehicles
"ABS" Warning Light . . . . . . . . . . . . . . . . . . .
Normal Operation . . . . . . . . . . . . . . . . . . . . .
Tech 2 Scan Tool . . . . . . . . . . . . . . . . . . . . . .
DATA LIST . . . . . . . . . . . . . . . . . . . . . . . . . . .
ACTUATOR TEST . . . . . . . . . . . . . . . . . . . . .
Tech 2 Service Bleed . . . . . . . . . . . . . . . . . .
Basic Diagnostic Flow Chart
Basic Inspection Procedure
EHCU Connector Pin-out Checks
Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . .
Connector List . . . . . . . . . . . . . . . . . . . . . . . .
Part Location . . . . . . . . . . . . . . . . . . . . . . . . .
Symptom Diagnosis . . . . . . . . . . . . . . . . . . . . .
Chart A-1 ABS Works Frequently But
Vehicle Does Not Decelerate
Chart TA-1 ABS Works Frequently But
Vehicle Does Not Decelerate
(Use TECH 2) . . . . . . . . . . . . . . . . . . . . . . . .
Chart A-2 Uneven Braking Occurs While
ABS Works . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chart TA-2 Uneven Braking Occurs While
ABS Works (Use TECH 2)
Chart A-3, TA-3 The Wheels Are Locked
BRAKES
CONTENTS
5A-1
5B-1
. . . . . . . . . . . . 5C-1
. . . . . . . . . . . . . . 5D1-1
. . . . . . . . . . . . . . 5D2-1
Brake Control System
CONTENTS
5A-2
5A-3
. . . . . . . . . . . . . . . . . 5A-4
5A-10
. 5A-10
5A-10
5A-10
5A-10
. . . . . . . . . . . 5A-10
5A-10
. . . . . . . . . . . . 5A-10
5A-11
5A-11
. . . . . . . . . . . . . . . 5A-11
. . . 5A-11
. . . . . . . . . . . . 5A-11
5A-11
. . . . . 5A-12
5A-12
5A-12
5A-13
5A-16
5A-17
5A-21
. . . . . . . . . . . . 5A-22
. . . . . . . . . . . . . 5A-23
. . . . . . . . . 5A-24
5A-25
5A-28
5A-29
5A-30
. . . . . . . . . . . 5A-30
5A-31
5A-31
. . . . . . . . . . . . . 5A-31
. 5A-32
BRAKE CONTROL SYSTEM
Chart A-4 Brake Pedal Feed Is Abnormal
Chart A-5, TA-5 Braking Sound
(From EHCU) Is Heard While Not Braking
Diagnostic Trouble Codes
Diagnosis By "ABS" Warning Light
Illumination Pattern . . . . . . . . . . . . . . . . . . . . .
Diagnostic Trouble Codes (DTCs)
Chart B-1 With the key in the ON position
(Before starting the engine). Warning
light (W/L) is not activated.
Chart B-2 CPU Error (DTC 14 (Flash out) /
C0271, C0272, C0273, C0284 (Serial
communications)) . . . . . . . . . . . . . . . . . . . . .
Chart B-3 Low or High Ignition Voltage
(DTC 15 (Flash out) / C0277, 0278
(Serial communications))
Chart B-4 Excessive Dump Time
(DTC 17 (Flash out) / C0269
(Serial communications))
Chart B-5 Excessive Isolation Time
(DTC 18 (Flash out) / C0274
(Serial communications))
Chart B-6 G-Sensor Output Failure
(DTC 21 (Flash out) / C0276
(Serial communications))
Chart B-7 Brake Switch Failure
(DTC 22 (Flash out) / C0281
(Serial communications))
Chart B-8 2WD Controller in 4WD Vehicle
Controller (DTC 13 (Flash out) / C0285
(Serial communications)), 4WD State Input
Signal Failure (DTC 24 (Flash out) / C0282
(Serial communications))
Chart B-9 Pump Motor Failure (DTC 32
(Flash out) / C0267, C0268
(Serial communications))
Chart B-10 EHCU Valve Relay Failure
(DTC 35 (Flash out) / C0265, C0266
(Serial communications))
Chart B-11 FL Isolation Solenoid Coil Failure
(DTC 41 (Flash out) / C0245, C0247
(Serial communications))
Chart B-12 FL Dump Solenoid Coil Failure
(DTC 42 (Flash out) / C0246, C0248
(Serial communications))
SECTION
5A-1
. 5A-33
5A-34
. . . . . . . . . . . . . . . . 5A-35
5A-37
. . . . . . . 5A-38
. . . . . . . . . . . . . 5A-40
5A-41
. . . . . . . . . . . . . . . 5A-41
. . . . . . . . . . . . . . . 5A-41
. . . . . . . . . . . . . . . 5A-42
. . . . . . . . . . . . . . . 5A-42
. . . . . . . . . . . . . . . 5A-42
. . . . . . . . . . . . . . . 5A-43
. . . . . . . . . . . . . . . 5A-43
. . . . . . . . . . . . . . . 5A-44
. . . . . . . . . . . . . . . 5A-44
. . . . . . . . . . . . . . . 5A-44