DTC B1570-11: Indicator (Red) Circuit Short to Ground; DTC B157013: Indicator (Red) Circuit Open [08/2019 - ]: Procedure
WARNING: This page is about a different car, the 2022 Toyota Sequoia, 2021 Toyota Sequoia, and 2020 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK DTC
- Turn the engine switch off.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) and wait for 10 seconds or more.
- Turn the Techstream on.
- Clear the DTCs.
Refer to DTC CHECK / CLEAR [08/2019 - ]
- Check for DTCs and check that no DTCs are output.
OK
No DTCs are output.
Result
Proceed to OK NG
Result:
OK
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ]
Result:
NG
See step 2
- INSPECT ROOF CONSOLE BOX ASSEMBLY (MANUAL [SOS] SWITCH) (RED INDICATOR)
- Remove the roof console box assembly (manual [SOS] switch).
*a Component without harness connected
(Roof Console Box Assembly (Manual [SOS] Switch))Refer to REMOVAL [08/2019 - ]
- Connect 2 dry-cell batteries (1.5 V each) in series.
- Connect a positive (+) lead from the batteries to terminal 12 (IND1) and a negative (-) lead to terminal 14 (GND3) of the roof console box assembly (manual [SOS] switch) connector.
- Check if the manual (SOS) switch red indicator illuminates.
OK
Manual (SOS) switch red indicator illuminates.
Result
Proceed to OK NG
Result:
NG
REPLACE ROOF CONSOLE BOX ASSEMBLY (MANUAL [SOS] SWITCH). Refer to REMOVAL [08/2019 - ]
Result:
OK
See step 3
- Remove the roof console box assembly (manual [SOS] switch).
- CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - ROOF CONSOLE BOX ASSEMBLY (MANUAL [SOS] SWITCH))
- Disconnect the H207 DCM (telematics transceiver) connector.
- Disconnect the U7 roof console box assembly (manual [SOS] switch) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition H207-4 (IND1) - U7-12 (IND1) Always Below 1 Ω H207-4 (IND1) or U7-12 (IND1) - Body ground Always 10 kΩ or higher H207-3 (SIG-) - U7-14 (GND3) Always Below 1 Ω H207-3 (SIG-) or U7-14 (GND3) - 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
- REPLACE DCM (TELEMATICS TRANSCEIVER)
- Replace the DCM (telematics transceiver) with a new one.
Refer to REMOVAL [08/2019 - ]
NOTE:- The engine 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 [08/2019 - ]
- Replace the DCM (telematics transceiver) with a new one.