DTC B1570-11: Indicator (Red) Circuit Short to Ground; DTC B1570-13: Indicator (Red) Circuit Open [10/2022 - ]: Procedure

Pre-procedure1

1. Turn the ignition switch to ON and wait for 10 seconds or more.

   Procedure1

2. Clear the DTCs.

   Body Electrical > Telematics > Clear DTCs 

   Result

   Proceed to
   NEXT

   Post-procedure1

3. None

Result: 

NEXT 

See step  2

1. Check for DTCs.

   Body Electrical > Telematics > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

Result: 

B 

See step  3

Pre-procedure1

1. Remove the map light assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Map Light Assembly [Manual (SOS) Switch])

   Refer to REMOVAL [12/2017 - ]

2. Connect 2 dry-cell batteries (1.5 V each) in series.
3. Connect the positive (+) lead to terminal N9-30 (IND1) and the negative (-) lead to terminal N7-22 (GND) of the map light assembly connector.

   Procedure1

4. Check if the illumination for the manual (SOS) switch red indicator comes on.

   OK

   Red indicator comes on.

   Result

   Proceed to
   OK
   NG

   Post-procedure1

5. None

Result: 

NG 

REPLACE MAP LIGHT ASSEMBLY (MANUAL [SOS] SWITCH). Refer to  REMOVAL [12/2017 - ] 

Result: 

OK 

See step  4

Pre-procedure1

1. Disconnect the G163 DCM (telematics transceiver) connector.
2. Disconnect the N7 and N9 map light assembly connectors.

   Procedure1

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G163-4 (IND1) - N9-30 (IND1)	Always	Below 1 Ω
   N7-22 (GND) - Body ground	Always	Below 1 Ω
   G163-4 (IND1) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Replace the DCM (telematics transceiver).

   Refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

   NOTE:

   • The ignition 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 [10/2022 - ]