Electric Parking Brake ECU Communication Stop Mode [09/2017 - 05/2019]: Procedure
- CHECK FOR OPEN IN CAN BUS WIRE (PARKING BRAKE ECU ASSEMBLY BRANCH WIRE)
- Disconnect the cable from the negative (-) auxiliary battery terminal.
- Disconnect the parking brake ECU assembly connector.
*a Front view of wire harness connector
(to Parking Brake ECU Assembly) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Q24-11 (CANH) - Q24-1 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
- Disconnect the parking brake ECU assembly connector.
*a Front view of wire harness connector
(to Parking Brake ECU Assembly) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Q25-9 (GND1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω - Reconnect the cable to the negative (-) auxiliary battery terminal.NOTE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.
Refer to INITIALIZATION [09/2017 - 05/2019]
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition Q25-7 (+B) - Body ground Power switch off 11 to 14 V Q25-12(+B2) - Body ground Power switch off 11 to 14 V Q24-3(BECU) - Body ground Power switch on (IG) 11 to 14 V Power switch off Below 1 V Q24-5 (IG) - Body ground Power switch on (IG) 11 to 14 V Power switch off Below 1 V Result
Proceed to OK NG
Result:
OK
REPLACE PARKING BRAKE ECU ASSEMBLY. Refer to REMOVAL [10/2014 - 05/2019]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
- Disconnect the parking brake ECU assembly connector.