Trouble Code 52 Motor Relay On Failure - Motor Relay On Failure

DIAGNOSIS: 

• Faulty motor
• Faulty motor relay
• Faulty harness connector

TROUBLE SYMPTOM: 

• ABS does not operate.

WIRING DIAGRAM: 

Fig 1: Wiring Diagram

1. 10AD1: CHECK MOTOR RELAY IN ABSCM & H/U. 

   Measure resistance between ABSCM & H/U terminals.

   Terminals 

   1. No. 25 - No. 26: 
   Fig 2: Measuring Resistance Between ABSCM & H/U Terminals.

   

   CHECK: Is the resistance more than 1 Mohm? 

   1. YES:  Go to step 10AD2. 
   2. NO:  Replace ABSCM & H/U, see ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM & H/U)  .
2. 10AD2: CHECK MOTOR OPERATION. 

   Operate the sequence control, see ABS SEQUENCE CONTROL  .

   NOTE: Use the diagnosis connector to operate the sequence control.

   CHECK: Can motor revolution noise (buzz) be heard when carrying out the sequence control? 

   1. YES:  Go to step 10AD3. 
   2. NO:  Replace ABSCM & H/U, see ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM & H/U)  .
3. 10AD3: CHECK POOR CONTACT IN CONNECTORS. 

   Turn ignition switch to OFF.

   CHECK: Is there poor contact in connector between hydraulic unit, relay box and ABSCM & H/U? 

   1. YES:  Repair connector.
   2. NO:  Go to step 10AD4. 
4. 10AD4: CHECK ABSCM & H/U. 
   1. Connect all connectors.
   2. Erase the memory.
   3. Perform inspection mode.
   4. Read out the trouble code.

   CHECK: Is the same trouble code as in the current diagnosis still being output? 

   1. YES:  Replace ABSCM & H/U, see ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM & H/U)  .
   2. NO:  Go to step 10AD5. 
5. 10AD5: CHECK ANY OTHER TROUBLE CODES APPEARANCE. 

   CHECK: Are other trouble codes being output? 

   1. YES:  Proceed with the diagnosis corresponding to the trouble code.
   2. NO:  A temporary poor contact.