Page 202 - Workshop Manual - Aumark (BJ1051)

04-58
Diagnose- ABS system

Diagnostic Procedure

• Check brake line for leakage, breakage, and deformation, etc.
Is check result normal?
Yes > Repair brake line. (Refer to “Chapter 26 Service Brake-Brake System,
On-Vehicle Inspection”.)
No > Go to step 1.

1. Checking ABS sensors
(a) Refer to “Chapter 04 Diagnosis-ABS, 3-1 Sensor Gap Large (Right Front Wheel)”.
(b) Refer to “Chapter 04 Diagnosis-ABS, 4-1 Sensor Broken/Shorted (Right Front Wheel)”.
(c) Refer to “Chapter 04 Diagnosis-ABS, 5-1 Sensor Signal Unstable (Right Front Wheel)”.
Are check results normal?
Yes > Go to step 2.
No > Perform troubleshooting according to diagnostic procedures in above reference sections.
2. Checking ABS ring gears
(a) Refer to “Chapter 04 Diagnosis-ABS, 6-1 Ring Gear Damaged (Right Front Wheel)”.

04 (b) Refer to “Chapter 04 Diagnosis-ABS, 6-2 Ring Gear Damaged (Left Front Wheel)”.
(c) Refer to “Chapter 04 Diagnosis-ABS, 6-3 Ring Gear Damaged (Right Rear Wheel)”.
(d) Refer to “Chapter 04 Diagnosis-ABS, 6-4 Ring Gear Damaged (Left Rear Wheel)”.
Are check results normal?
Yes > Go to step 3.
No > Perform troubleshooting according to diagnostic procedures in above reference sections.
3. Checking ABS solenoid valves
(a) Refer to “Chapter 04 Diagnosis-ABS, 2-1 ABS Solenoid Valve (Right Front Wheel)”.
(b) Refer to “Chapter 04 Diagnosis-ABS, 2-2 ABS Solenoid Valve (Left Front Wheel)”.
(c) Refer to “Chapter 04 Diagnosis-ABS, 2-3 ABS Solenoid Valve (Right Rear Wheel)”.
(d) Refer to “Chapter 04 Diagnosis-ABS, 2-4 ABS Solenoid Valve (Left Rear Wheel)”.
Are check results normal?
Yes > Check brake system. (Refer to “Chapter 26 Service Brake-Brake System, On-Vehicle
Inspection”.)
If brake system is normal, replace ABS control unit.
No > Perform troubleshooting according to diagnostic procedures in above reference sections.

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