Driving Support Switch Control ECU Communication Stop Mode [08/2013 - ]: Procedure

PRECAUTION
NOTE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work. Refer to PRECAUTION [08/2013 - ] .

NEXT: Go to next step
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
  WARNING:
  Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
  
  NOTE:
  When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION [08/2013 - ] .
NEXT: Go to next step

CHECK FOR OPEN IN CAN BUS WIRE (DRIVING SUPPORT SWITCH CONTROL ECU)

Disconnect the driving support switch control ECU connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Switch Condition	Specified Condition
E89-8 (CANH) - E89-3 (CANL)	Ignition switch off	54 to 69 Ω

TEXT IN ILLUSTRATION

*a	Front view of wire harness connector (to Driving Support Switch Control ECU)

NG → REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)

OK: Go to next step

CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT SWITCH CONTROL ECU -)

Connect the cable to the negative (-) battery terminal.

NOTE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION [08/2013 - ] .

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
E89-16 (GND) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Resistance

Tester Connection	Switch Condition	Specified Condition
E89-6 (+B) - Body ground	Always	11 to 14 V
E89-2 (IG) - Body ground	Ignition switch ON	11 to 14 V

TEXT IN ILLUSTRATION

*a	Front view of wire harness connector (to Driving Support Switch Control ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 5