ANTI-LOCK BRAKE SYSTEM (ABS) 5A4-9 Basic Diagnostic Flow Chart Basic Inspection Procedure 1. Basic Inspection of Service Brake 2. Ground Inspection Step Action Yes No 1 1. Customer complaint. 2. Questioning to customer. 3. Basic inspection (Refer to “Basic inspection procedure”) Using TECH 2? Go to Step 2 Go to Step 3 2 Make sure of DTC by TROUBLE CODE. Is EHCU including DTC? Go to Step 5 Go to Step 4 3 Check if the DTC is stored. Is EHCU including DTC? Go to Step 5 Go to Step 4 4 Test drive. Is W/L lit? Go to Step 5 Trouble diagnosis based on symptom (Refer to “SYMPTOM DIAGNOSIS”) Go to Step 5 5 1. Repair of faulty part. 2. Elimination of DTC. 3.
Inspection of “ABS” W/L illumination pattern with ignition SW “ON”. 4. Test drive. Does repeat trouble? Repeat the diagnosis of the symptom or DTC appears again Go to Step 1 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? Finished Go to Step 6 Step Action Yes No 1 Is the fluid level normal? Go to Step 2 Replenish with fluid. Go to Step 2 2 Does fluid leak? Repair. Go to Step 3 Go to Step 3 3 Is the booster functioning normal? Go to Step 4 Repair. Go to Step 4 4 Is the pad and rotor normal? Go to Step 5 Repair.
Go to Step 5 5 Reconnect all components and ensure all components are properly mounted. Was this step finished? Finished Go to Step 5 Step Action Yes No 1 Are ABS-related ground points ok? Go to Step 2 Repair. Go to Step 2 2 Reconnect all components and ensure all components are properly mounted. Was this step finished? Finished Go to Step 2