Toyota Tundra Service Manual: Headlight Dimmer Relay

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT HEADLIGHT DIMMER RELAY

(a) Remove the headlight dimmer relay from the engine room relay box.

(b) Check the resistance.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
3 - 5	Battery voltage not applied to terminals 1 and 2	10 kΩ or higher
3 - 5	Battery voltage applied to terminals 1 and 2	Below 1 Ω
3 - 4	Battery voltage not applied to terminals 1 and 2	Below 1 Ω
3 - 4	Battery voltage applied to terminals 1 and 2	10 kΩ or higher

If the result is not as specified, replace the headlight dimmer relay.

Toyota Tundra Service Manual > Sfi System: Throttle / Pedal Position Sensor / Switch "A" Circuit (P0120-P0123,P0220,P0222,P0223,P2135)
DESCRIPTION The TP sensor is mounted on the throttle with motor body assembly, and detects the opening angle of the throttle valve. This sensor is a non-contact type. It uses Hall-effect elements in order to yield accurate signals even in extreme driving conditions, such as at high speeds as well as ...

Toyota Tundra Owners Manual