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Diagnosis Procedure
1.CHECK NETWORK-DTC
Check the CAN diagnosis results from M.U.T.-III SE to see that the chassis CAN communication 3 circuit have no malfunction.
Are the chassis CAN communication 3 circuit normal?
.
Check and repair chassis CAN communication 3 circuit.
 
2.CONNECTOR INSPECTION
  1. Turn the ignition switch OFF.
  2. Disconnect the battery cable from the negative terminal.
  3. Disconnect all the control unit connectors on chassis CAN communication 4 circuit.
  4. Check the terminals and connectors for damage, bend and loose connection.
Is the inspection result normal?
.
Repair the terminal and connector.
 
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
Check the continuity between the chassis control module harness connector and ABS actuator and electric unit (control unit) harness connector.
Chassis control module harness connectorABS actuator and electric unit (control unit) harness connectorContinuity
Connector No.Terminal No.Connector No.Terminal No.
B369E12511Existed
2125Existed
Is the inspection result normal?
.
Check the harness and repair or replace the root cause.
 
4.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the chassis control module harness connector terminals.
Chassis control module harness connectorContinuity
Connector No.Terminal No.
B36921Not existed
Is the inspection result normal?
.
Check the harness and repair or replace the root cause.
 
5.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the chassis control module and the ground.
Chassis control module harness connectorGroundContinuity
Connector No.Terminal No.
B369Not existed
21Not existed
Is the inspection result normal?
.
Check the harness and repair or replace (if shield line is short) the root cause.
 
6.CHECK CHASSIS CONTROL MODULE AND ABS ACTUATOR AND ELECTRIC UNIT(CONTROL UNIT) TERMINATION CIRCUIT
  1. Remove the chassis control module and the ABS actuator and electric unit (control unit).
  2. Check the resistance between the chassis control module terminals.
    Chassis control moduleResistance (Ω)
    Terminal No.
    921Approx. 108 – 132
  3. Check the resistance between the ABS actuator and electric unit (control unit) terminals.
    ABS actuator and electric unit (control unit)Resistance (Ω)
    Terminal No.
    1125Approx. 108 – 132
Is the measurement value within the specification?
.
Replace the chassis control module and/or the ABS actuator and electric unit (control unit).
 
7.CHECK SYMPTOM
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with customer)” are reproduced.
Inspection result
: .
: Start the diagnosis again. Follow the trouble diagnosis procedure when past error is detected.
 
8.CHECK UNIT REPRODUCTION
Perform the reproduction test as per the following procedure for each unit.
  1. Turn the ignition switch OFF.
  2. Disconnect the battery cable from the negative terminal.
  3. Disconnect one of the unit connectors of chassis CAN communication 4 circuit.
    noteChassis control module and ABS actuator and electric unit (control unit) have a termination circuits. Check other units first.
  4. Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom (Results from interview with customer)” are reproduced.
    noteAlthough unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result
: Connect the connector. Check other units as per the above procedure.
: Replace the unit whose connector was disconnected.