Code 41: Abnormal Abs Control Module

DIAGNOSIS: 

• Faulty ABSCM & H/U.

TROUBLE SYMPTOM: 

• ABS does not operate.

WIRING DIAGRAM: 

Fig 1: Wiring Diagram

1. 8S1: CHECK GROUND CIRCUIT OF ABSCM & H/U. 
   1. Turn ignition switch to OFF.
   2. Disconnect connector from ABSCM & H/U.
   3. Measure resistance between ABSCM & H/U and chassis ground.

   Connector & terminal 

   1. (F49) No. 23 - Chassis ground: 
   Fig 2: Measuring Resistance Between ABSCM & H/U & Chassis Ground

   

   CHECK: Is the resistance less than 0.5 ohm? 

   1. YES:  Go to step 8S2. 
   2. NO:  Repair ABSCM & H/U ground harness.
2. 8S2: CHECK POOR CONTACT IN CONNECTORS. 

   CHECK: Is there poor contact in connectors between battery, ignition switch and ABSCM & H/U? 

   1. YES:  Repair connector.
   2. NO:  Go to step 8S3. 
3. 8S3: CHECK SOURCES OF SIGNAL NOISE. 

   CHECK: Is the car telephone or the wireless transmitter properly installed? 

   1. YES:  Go to step 8S4. 
   2. NO:  Properly install the car telephone or the wireless transmitter.
4. 8S4: CHECK SOURCES OF SIGNAL NOISE. 

   CHECK: Are noise sources (such as an antenna) installed near the sensor harness? 

   1. YES:  Install the noise sources apart from the sensor harness.
   2. NO:  Go to step 8S5. 
5. 8S5: 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 8S6. 
6. 8S6: 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.