Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Inspection

INSPECTION

PROCEDURE

1. INSPECT STEERING HEATER SWITCH

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
5 (IG) - 2 (B)	Steering heater switch is pushed	Below 1 Ω
5 (IG) - 2 (B)	Steering heater switch is not pushed	10 kΩ or higher

If the result is not as specified, replace the steering heater switch.

*a	Component without harness connected (Steering Heater Switch)

(b) Indicator Inspection

(1) Apply battery voltage to the steering heater switch and check that the indicator illuminates.

OK:

Condition

Specified Condition

Battery positive (+) → Terminal 2 (B)

Battery negative (-) → Terminal 4 (E)

Illuminates

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Smart Key System(for Start Function, Hv Model): System Voltage or GND Energization Malfunction (B228B)
DESCRIPTION This DTC is stored when there is a malfunction in the certification ECU (smart key ECU assembly) auxiliary battery power supply circuit or ground circuit. DTC No. Detection Item DTC Detection Condition Trouble Area Note B228B System Voltage or GND Energization Malfunction A malfunction i ...

Toyota Avalon (XX50) 2019-2022 Owners Manual