Toyota Avalon (XX50): Relay

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT DEF RELAY

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
3 - 4	Auxiliary battery voltage applied between terminals 1 and 2	10 kΩ or higher
3 - 4	Auxiliary battery voltage not applied between terminals	Below 1 Ω
3 - 5	Auxiliary battery voltage applied between terminals 1 and 2	Below 1 Ω
3 - 5	Auxiliary battery voltage not applied between terminals	10 kΩ or higher
4 - 5	Always	10 kΩ or higher

If the result is not as specified, replace the DEF relay.

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Hybrid Control System: Generator High-voltage Circuit. Generator Resolver Circuit. How To Proceed With Troubleshooting
Generator High-voltage Circuit DESCRIPTION The cause of this malfunction may be the generator high-voltage circuit. Check the generator internal resistance and the connection condition of the high-voltage line between the inverter and generator to check whether there is an open or short circuit. Rel ...