DTC U1114: Lost Communication with Main Switch Module: Procedure

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 prevent airbag and seat belt pretensioner activation.

   NOTE:

   • w/ Navigation System (for HDD):

     After the engine switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

     Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal

     Condition	Waiting Time
     Vehicle enrolled in safety connect system	6 minutes
     Vehicle not enrolled in safety connect system	1 minute

   • When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION .

NEXT: Go to next step 

1. Disconnect the L6 outer mirror switch connector.
   Fig 1: Identifying L6 Outer Mirror Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   L6-2 (CANP) - L6-3 (CANN)	Engine switch off	54 to 69 Ω

NG → REPAIR OR REPLACE OUTER MIRROR SWITCH BRANCH WIRE OR CONNECTOR (CANP, CANN) 

OK: Go to next step 

1. 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 .

2. Disconnect the L6 outer mirror switch connector.
   Fig 2: Identifying L6 Outer Mirror Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L6-1 (E) - Body ground	Always	Below 1 Ω

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

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   L6-12 (B) - Body ground	Always	11 to 14 V
   L6-11 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4