DTC B15C5-11: Emergency Call Switch Circuit Short to Ground; DTC B15C5-13: Emergency Call Switch Circuit Open [10/2020 - 11/2021]: Procedure

1. Turn the power switch off.
2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG) and wait for 10 seconds or more.
4. Turn the Techstream on.
5. Check for DTCs and check that no DTCs are output.

   Refer to DTC CHECK / CLEAR [10/2020 - 10/2022]

   Body Electrical > Telematics > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021] 

Result: 

NG 

See step  2

1. Remove the map light assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Refer to REMOVAL [10/2020 - 11/2021]

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   31 (SIG1) - 32 (GND3)	Manual (SOS) switch not pressed	410 to 414 Ω
   31 (SIG1) - 32 (GND3)	Manual (SOS) switch pressed	81 to 83 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE MAP LIGHT ASSEMBLY. Refer to  REMOVAL [10/2020 - 11/2021] 

Result: 

OK 

See step  3

1. Disconnect the G163 DCM (Telematics Transceiver) connector.
2. Disconnect the N9 map light assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G163-21 (SIG1) - N9-31 (SIG1)	Always	Below 1 Ω
   G163-3 (SIG-) - N9-32 (GND3)	Always	Below 1 Ω
   G163-21 (SIG1) - Body ground	Always	10 kΩ or higher
   G163-3 (SIG-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Replace the DCM (Telematics Transceiver).

   Refer to REMOVAL [10/2020 - 11/2021]

   NOTE:

   • The power switch must be off.
   • Do not exchange the DCM (Telematics Transceiver) with one from another vehicle.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

PERFORM DCM ACTIVATION. Refer to  DCM ACTIVATION [10/2020 - 10/2022]