Diagnosis Procedure
- CHECK DTC WITH ADAS CONTROL UNIT
Refer to Diagnosis Description and refer to DTC Index .
Are any DTCs detected?
YES
Perform the Diagnosis Procedure corresponding to the detected DTC.
NO
GO TO 2.
- CHECK OVERALL FUNCTION
WITH CONSULT
- Turn ignition switch ON.
- Select "BRAKE SW1" in "DATA MONITOR" mode with CONSULT.
- Check "BRAKE SW1" indication under the following conditions.
Monitor item
Condition
Indication
BRAKE SW1
(ICC brake switch)
Brake pedal
Slightly depressed
OFF
Fully released
ON
WITHOUT CONSULT
- Turn ignition switch ON.
- Check the voltage between ECM harness connector terminals under the following conditions.
ECM
Condition
Voltage (V)
Connector
+
-
Terminal
Terminal
E20
140
(ICC brake switch signal)
152
Brake pedal
Slightly depressed
Approx. 0
Fully released
Battery voltage
Is the inspection result normal?
YES
INSPECTION END
NO
GO TO 3.
- CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT-I
- Turn ignition switch OFF.
- Disconnect ICC brake switch harness connector.
- Turn ignition switch ON.
- Check the voltage between ICC brake switch harness connector and ground.
ICC brake switch
Ground
Voltage
Connector
Terminal
E68
2
Ground
0 V
Is the inspection result normal?
YES
GO TO 4.
NO
GO TO 7.
- CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT-II
Check the voltage between ICC brake switch harness connector and ground.
ICC brake switch
Ground
Voltage
Connector
Terminal
E68
1
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 6.
NO
GO TO 5.
- DETECT MALFUNCTIONING PART
Check the following.
- Fuse block (J/B) connector E103
- 10 A fuse (No. 3)
- Harness for open or short between ICC brake switch and fuse
Repair open circuit or short to ground in harness or connectors.
- CHECK ICC BRAKE SWITCH
Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 9.
NO
Replace ICC brake switch. Refer to BRAKE PEDAL : Removal & Installation .
- CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between ICC brake switch harness connector and ECM harness connector.
ICC brake switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E68
2
E20
140
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 9.
NO
GO TO 8.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness for open or short between ICC brake switch and ECM
- Loose or poor connection for each connector and harness
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK INTERMITTENT INCIDENT
Refer to Inspection .
INSPECTION END