IG Power Source Circuit [04/2018 - ]: Procedure
WARNING: This page is about a different car, the 2022 Toyota Avalon, 2021 Toyota Avalon, 2020 Toyota Avalon, and 2019 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BATTERY)
- Disconnect the G49 multiplex tilt and telescopic ECU connector.
*a Front view of wire harness connector
(to Multiplex Tilt and Telescopic ECU) - Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition G49-10 (IG) - Body ground Engine switch on (IG) 11 to 14 V Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 2
- Disconnect the G49 multiplex tilt and telescopic ECU connector.
- CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND)
- Disconnect the G49 multiplex tilt and telescopic ECU connector.
*a Front view of wire harness connector
(to Multiplex Tilt and Telescopic ECU) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G49-1 (GND) - Body ground Always Below 1 Ω G49-8 (GND2) - Body ground Always Below 1 Ω Result
Proceed to OK NG
Result:
OK
REPLACE MULTIPLEX TILT AND TELESCOPIC ECU. Refer to REMOVAL [04/2018 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Disconnect the G49 multiplex tilt and telescopic ECU connector.