Isuzu N-Series. Manual — part 256
EXHAUST BRAKE 5E-5
UNIT REPAIR
Exhaust Brake Unit
Disassembly
1. Exhaust Brake Valve Connector
2. Cotter Pin
3. Lock Nut
4. Clevis Joint
5. Power Chamber
6. Exhaust Valve Assembly
Inspection and Repair
Make the necessary adjustments, repairs, and part re-
placements if excessive wear or damage is discovered
during inspection.
Visual Inspection
Visually inspect the following parts for excessive wear
and damage.
If excessive wear or damage is discovered during in-
spection, the part(s) must be replaced.
• Exhaust brake valve
• Exhaust brake shaft
• Butterfly valve
• Bushings
• Power chamber
Power Chamber
(1) The exhaust brake valve should operate smoothly
when the negative pressure (400 mmHg to 700 mmHg)
is applied to the power chamber via the vacuum pump.
Legend
1. Exhaust brake valve connector
4. Clevis joint
2. Cotter pin
5. Power chamber
3. Lock nut
6. Exhaust valve assembly
N5A0466E
N5A0375E
5E-6 EXHAUST BRAKE
(2) At the points (A) and (B), the average clearance be-
tween the valve and the vehicle body should be as men-
tioned in the following table when the negative pressure
(650 mmHg to 700 mmHg) is applied to the power
chamber via the vacuum pump.
Reassembly
1. Exhaust Valve Assembly
2. Power Chamber
Tighten:
Power chamber fixing nut to 14 N
⋅m (1.4 kg⋅m / 122 lb⋅in)
3. Lock Nut
Tighten:
Lock nut to 13 N
⋅m (1.3 kg⋅m / 113 lb⋅in)
4. Clevis Joint
5. Cotter Pin
6. Exhaust Brake Valve Connector
Tighten:
More than 9.8 N
⋅m (1.0 kg⋅m / 7.2 lb⋅ft)
Clearance Between Valve And Body
mm (in)
Standard
4HF1 Engine
0.4 — 0.6 (0.016 — 0.024)
Others
0.1 — 0.2 (0.004 — 0.008)
Legend
1. Power chamber
2. Adjust bolt
3. Valve
N5A0376E
N5A0377E
N5A0379E
N5A0380E
International Service & Parts
Tokyo, Japan
WORKSHOP MANUAL
N-SERIES
ABS/ASR
SECTION 5A4
ABS/ASR 5A4-1
ABS/ASR
SECTION 5A4
ABS/ASR
Contents
ABS/ASR System. . . . . . . . . . . . 5A4-2
Connector List . . . . . . . . . . . ...5A4-13
Procedure of Trouble Diagnosis . . . . . 5A4-15
Function Check. . . . . . . . . . . .. 5A4-20
Trouble Diagnosis with Scan Tool . . . . .5A4-24
List of Diagnostic Trouble Code . . . . . 5A4-31
ABS Warning Lamp does not Come on with the Start-
er Switch ON. . . . . . . . . . . . . 5A4-35
ABS Warning Lamp Repeats Blinking After Turning
the Starter Switch to ON. . . . . . . . 5A4-36
ABS Warning Lamp Repeats Blinking After Turning
the Starter Switch to ON. . . . . . . . 5A4-37
DTC:C0213 (Flash Code 13) Model Type
Identification Fault Due to Wrong Assembly of
Control Unit. . . . . . . . . . . . . 5A4-38
DTC:C0214 (Flash Code 14) EHCU Fault. .5A4-40
DTC:C0215 (Flash Code 15) ECU Power Supply
Fault. . . . . . . . . . . . . . . ...5A4-41
DTC:C0216 (Flash Code 16) CAN Communication
Fault. . . . . . . . . . . . . . . ...5A4-42
DTC:C0226 (Flash Code 26) ECM Communication
Fault. . . . . . . . . . . . . . . ...5A4-44
DTC:C0233 (Flash Code 33) Motor Drive Circuit
Fault. . . . . . . . . . . . . . . ...5A4-45
DTC:C0234 (Flash Code 34) Motor Rotation
Fault. . . . . . . . . . . . . . . ...5A4-46
DTC:C0235 (Flash Code 35) ASR Communication
Line Fault/ASR Continuous Operation . . ..5A4-47
DTC:C0241 (Flash Code 41) Fail-Safe Relay
Fault. . . . . . . . . . . . . . . ...5A4-48
DTC:C0243 (Flash Code 43) Solenoid Drive Circuit
Fault. . . . . . . . . . . . . . . ...5A4-49
DTC:C0245 (Flash Code 45) Solenoid Monitor Circuit
Fault. . . . . . . . . . . . . . . ...5A4-50
DTC:C0251 (Flash Code 51) Speed Sensor Open/
Short Circuit; FL. . . . . . . . . . . .5A4-51
DTC:C0252 (Flash Code 52) Speed Sensor Open/
Short Circuit; FR . . . . . . . . . . . 5A4-52
DTC:C0253 (Flash Code 53) Speed Sensor Open/
Short Circuit; RL . . . . . . . . . . . 5A4-53
DTC:C0254 (Flash Code 54) Speed Sensor Open/
Short Circuit; RR. . . . . . . . . . . 5A4-54
DTC:C0261 (Flash Code 61) Speed Sensor Signal
Fault/Wrong Tire Size; FL. . . . . . . ..5A4-55
DTC:C0262 (Flash Code 62) Speed Sensor Signal
Fault/Wrong Tire Size; FR . . . . . . . .5A4-57
DTC:C0263 (Flash Code 63) Speed Sensor Signal
Fault/Wrong Tire Size; RL . . . . . . . .5A4-59
DTC:C0264 (Flash Code 64) Speed Sensor Signal
Fault/Wrong Tire Size; RR. . . . . . . .5A4-61
List of Trouble Symptom. . . . . . . . 5A4-62
Symptom: [The ABS Operates Frequently but Brake
Force is Insufficient, or the ASR Operates
Frequently.] (Check Flow A-1). . . . . ...5A4-63
Symptom: [The ABS Operates Frequently but Brake
Force is Insufficient, or the ASR Operates
Frequently.] (Check Flow TA-1). . . . . .5A4-64
Symptom: [The ABS Operates but Pulling to One
Side.] (Check Flow A-2) . . . . . . . . .5A4-65
Symptom: [The ABS Operates but Pulling to One
Side.] (Check Flow TA-2). . . . . . . ...5A4-66
Symptom: [Wheels are Locked During Brake
Operation.] (Check Flow A-3, TA-3). . . ...5A4-67
Symptom: [Feeling of Brake Pedal is Faulty.]
(Check Flow A-4) . . . . . . . . . . ...5A4-68
Symptom: [Brake Operating Noise Comes from the
Hydraulic Unit Though the Brake Pedal is not
Depressed.] (Check Flow A-5, TA-5) . . . .5A4-69
Electronic Hydraulic Control Unit (EHCU) . . .5A4-70
Components. . . . . . . . . . . . ...5A4-70
Removal. . . . . . . . . . . . . . .5A4-70
Installation. . . . . . . . . . . . . ..5A4-72
Speed Sensor (Front) . . . . . . . . . . 5A4-74
Components. . . . . . . . . . . . ...5A4-74
Sensor Rotor (Front Wheel) . . . . . . . ..5A4-78
Components. . . . . . . . . . . . ...5A4-78
Removal. . . . . . . . . . . . . . .5A4-78
Installation. . . . . . . . . . . . . ..5A4-79
Sensor Harness (Rear Axle). . . . . . . ..5A4-82
Components. . . . . . . . . . . . ...5A4-82
Removal. . . . . . . . . . . . . . .5A4-82
Installation. . . . . . . . . . . . . ..5A4-82
Rear Speed Sensor . . . . . . . . . . ...5A4-84
Components. . . . . . . . . . . . ...5A4-84
Rear Sensor Rotor. . . . . . . . . . . .5A4-93
Components. . . . . . . . . . . . ...5A4-93
Removal. . . . . . . . . . . . . . .5A4-93
Installation. . . . . . . . . . . . . ..5A4-94
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