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Diagnosis Procedure
1.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 3 circuit.
  4. Check the terminals and connectors for damage, bend and loose connection.
Is the inspection result normal?
.
Repair the terminal and connector.
 
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
Check the continuity between the 8CH CAN gateway harness connector and chassis control module harness connector.
8CH CAN gateway harness connectorChassis control module harness connectorContinuity
Connector No.Terminal No.Connector No.Terminal No.
M1611B368Existed
1020Existed
Is the inspection result normal?
.
Check the harness and repair or replace the root cause.
 
3.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the 8CH CAN gateway harness connector terminals.
8CH CAN gateway harness connectorContinuity
Connector No.Terminal No.
M161110Not existed
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 8CH CAN gateway and the ground.
8CH CAN gateway harness connectorGroundContinuity
Connector No.Terminal No.
M1611Not existed
10Not existed
Is the inspection result normal?
.
Check the harness and repair or replace (if shield line is short) the root cause.
 
5.CHECK 8CH CAN GATEWAY AND CHASSIS CONTROL MODULE TERMINATION CIRCUIT
  1. Remove the 8CH CAN gateway and the chassis control module.
  2. Check the resistance between the 8CH CAN gateway terminals.
    8CH CAN gatewayResistance (Ω)
    Terminal No.
    1110Approx. 108 – 132
  3. Check the resistance between the chassis control module terminals.
    Chassis control moduleResistance (Ω)
    Terminal No.
    820Approx. 108 – 132
Is the measurement value within the specification?
.
(Chassis control module)Replace the chassis control module.
 
6.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.
 
7.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 3 circuit.
    note8CH CAN gateway and chassis control module 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.
 
8.CHECK WARNING LIGHT
  1. Turn the ignition switch ON.
  2. Check the following warning light.
    • ASC warning light
    • Brake warning light
    • Power steering warning light
Is any of the inspection result normal?
INSPECTION END
Replace the 8CH CAN gateway.