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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 ITS CAN communication 1 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 ADAS control unit 2 harness connector.
8CH CAN gateway harness connectorADAS control unit 2 harness connectorContinuity
Connector No.Terminal No.Connector No.Terminal No.
M2944B437Existed
4317Existed
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.
M294443Not 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.
M2944Not existed
43Not 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 ADAS control unit 2 TERMINATION CIRCUIT
  1. Remove the 8CH CAN gateway and the ADAS control unit 2.
  2. Check the resistance between the 8CH CAN gateway terminals.
    8CH CAN gatewayResistance (Ω)
    Terminal No.
    4443Approx. 108 – 132
  3. Check the resistance between the ADAS control unit 2 terminals.
    ADAS control unit 2Resistance (Ω)
    Terminal No.
    3717Approx. 108 – 132
Is the measurement value within the specification?
.
Replace the 8CH CAN gateway and/or the ADAS control unit 2.
 
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 ITS CAN communication 1 circuit.
    note8CH CAN gateway and ADAS control unit 2 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.