Toyota Tundra Service Manual: Inspection

INSPECTION

PROCEDURE

1. INSPECT UNLOCK WARNING SWITCH ASSEMBLY

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

Standard resistance:

Tester Connection	Condition	Specified Condition
1 - 2	Switch free (Key removed)	10 kΩ or higher
1 - 2	Switch pushed (Key set)	Below 1 Ω

If the result is not as specified, replace the unlock warning switch assembly.

Text in Illustration

*a	Component without harness connected (Unlock Warning Switch Assembly)

Toyota Tundra Service Manual > Touch Select 2-4 And High-low System: Automatic Disconnecting Differential Motor Limit Switch Circuit (P17A4)
DESCRIPTION When the A.D.D. actuator is switching between 2WD and 4WD, the DL1 and DL2 terminals of the limit switch are in one of the ON/OFF combinations listed in the table below. Terminal In 2WD Switching between 2WD and 4WD In 4WD DL1 OFF (OPEN) ON (GND) ON (GND) DL2 ON (GND) ON (GND) OFF (OPEN) ...

Toyota Tundra Owners Manual