Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK SELF-DIAGNOSIS RESULTS 
   1. Perform "All DTC Reading" with CONSULT.
   2. Check if the "U1000" is detected other than "C1A05" in "Self Diagnostic Result" of "ICC/ADAS".

   Is "U1000" detected? 

   YES: Perform the CAN communication system inspection. Repair or replace the malfunctioning parts. Refer to "TROUBLE DIAGNOSIS FLOW CHART ".

   NO: GO TO  2.

2. CHECK STOP LAMP SWITCH AND ICC BRAKE SWITCH 

   Check that "STOP LAMP SW" and "BRAKE SW" operate normally in "DATA MONITOR" of "ICC/ADAS".

   Is the inspection result normal? 

   YES: GO TO  3.

   NO-1: When "BRAKE SW" operation is malfunctioning: GO TO  4.

   NO-2: When "STOP LAMP SW" operation is malfunctioning: GO TO  9.

3. CHECK STOP LAMP SWITCH 

   Check that "STOP LAMP SW" operate normally in "DATA MONITOR" of "ABS".

   Is the inspection result normal? 

   YES: GO TO  14.

   NO: GO TO  9.

4. CHECK ICC BRAKE SWITCH INSTALLATION 
   1. Turn ignition switch OFF.
   2. Check ICC brake switch for correct installation. Refer to "ADJUSTMENT ".

   Is the inspection result normal? 

   YES: GO TO  5.

   NO: Adjust ICC brake switch installation. Refer to "ADJUSTMENT ".

5. ICC BRAKE SWITCH INSPECTION 
   1. Disconnect ICC brake switch connector.
   2. Check ICC brake switch. Refer to "COMPONENT INSPECTION (ICC BRAKE SWITCH) ".

   Is the inspection result normal? 

   YES: GO TO  6.

   NO: Replace ICC brake switch.

6. CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT 
   1. Turn the ignition switch ON.
   2. Check voltage between ICC brake switch harness connector and ground.

      Terminals			Voltage (Approx.)
      (+)		(-)
      ICC brake switch		Ground
      Connector	Terminal
      E72	1		Battery voltage

   Is the inspection result normal? 

   YES: GO TO  7.

   NO: Repair the harnesses or connectors.

7. CHECK HARNESS BETWEEN ICC BRAKE SWITCH AND ECM 
   1. Turn ignition switch OFF
   2. Disconnect ECM connector.
   3. Check for continuity between ICC brake switch harness connector and ECM harness connector.

      ICC brake switch		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      E72	2	E16	126	Yes

   4. Check for continuity between ICC brake switch harness connector and ground.

      ICC brake switch		Ground	Continuity
      Connector	Terminal
      E72	2		No

   Is the inspection result normal? 

   YES: GO TO  8.

   NO: Repair the harnesses or connectors.

8. PERFORM SELF-DIAGNOSIS OF ECM 
   1. Connect all connectors again if the connectors are disconnected.
   2. Turn ignition switch ON.
   3. Perform "All DTC Reading".
   4. Check if any DTC is detected in "Self Diagnostic Result" of "ENGINE". Refer to "DTC INDEX ".

   Is any DTC detected? 

   YES: Repair or replace the malfunctioning parts identified by the self-diagnosis result.

   NO: Replace the ADAS control unit. Refer to "REMOVAL AND INSTALLATION ".

9. CHECK STOP LAMP SWITCH INSTALLATION 
   1. Turn ignition switch OFF.
   2. Check stop lamp switch for correct installation. Refer to "ADJUSTMENT ".

   Is the inspection result normal? 

   YES: GO TO  10.

   NO: Adjust stop lamp switch installation. Refer to "ADJUSTMENT ".

10. STOP LAMP SWITCH INSPECTION 
    1. Disconnect stop lamp switch connector.
    2. Check stop lamp switch. Refer to "COMPONENT INSPECTION (STOP LAMP SWITCH) ".

    Is the inspection result normal? 

    YES: GO TO  11.

    NO: Replace stop lamp switch.

11. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT 
    1. Turn the ignition switch ON.
    2. Check voltage between stop lamp switch harness connector and ground.

       Terminals			Voltage (Approx.)
       (+)		(-)
       Stop lamp switch		Ground
       Connector	Terminal
       E38	1		Battery voltage
       	3

    Is the inspection result normal? 

    YES: GO TO  12.

    NO: Repair the harnesses or connectors.

12. CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ECM 
    1. Turn ignition switch OFF
    2. Disconnect ECM, rear combination lamp and high-mounted stop lamp connectors.
    3. Check for continuity between stop lamp switch harness connector and ECM harness connector.

       Stop lamp switch		ECM		Continuity
       Connector	Terminal	Connector	Terminal
       E38	2	E16	122	Yes

    4. Check for continuity between stop lamp switch harness connector and ground.

       Stop lamp switch		Ground	Continuity
       Connector	Terminal
       E38	2		No

    Is the inspection result normal? 

    YES: GO TO  13.

    NO: Repair the harnesses or connectors.

13. CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) 
    1. Disconnect ABS actuator and electric unit (control unit) connector.
    2. Check for continuity between stop lamp switch harness connector and ABS actuator and electric unit (control unit) harness connector.

       Stop lamp switch		ABS actuator and electric unit (control unit)		Continuity
       Connector	Terminal	Connector	Terminal
       E38	4	E125	5	Yes

    3. Check for continuity between stop lamp switch harness connector and ground.

       Stop lamp switch		Ground	Continuity
       Connector	Terminal
       E38	4		No

    Is the inspection result normal? 

    YES: GO TO  14.

    NO: Repair the harnesses or connectors.

14. PERFORM SELF-DIAGNOSIS OF ECM 
    1. Connect all connectors again if the connectors are disconnected.
    2. Turn ignition switch ON.
    3. Perform "All DTC Reading".
    4. Check if any DTC is detected in "Self Diagnostic Result" of "ENGINE". Refer to "DTC INDEX ".

    Is any DTC detected? 

    YES: Repair or replace the malfunctioning parts identified by the self-diagnosis result.

    NO: GO TO  15.

15. PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) 

    Check if any DTC is detected in "Self Diagnostic Result" of "ABS". Refer to "DTC INDEX ".

    Is any DTC detected? 

    YES: Repair or replace the malfunctioning parts identified by the self-diagnosis result.

    NO: Replace the ADAS control unit. Refer to "REMOVAL AND INSTALLATION ".