Toyota Tacoma 2015-2018 Service Manual: Engine Switch Illumination Circuit

Toyota Tacoma 2015-2018 Service Manual / Lighting / Lighting System / Engine Switch Illumination Circuit

DESCRIPTION

The illuminated entry system controls the engine switch illumination.

WIRING DIAGRAM

PROCEDURE

1.	READ VALUE USING TECHSTREAM (POWER/ENGINE SW LIGHT)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch to ON.

(d) Enter the following menus: Body Electrical / Smart Key / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Smart Key

Tester Display	Test Part	Control Range	Diagnostic Note
Power/Engine SW Light	Engine switch illumination	OFF/ON	When performing this Active Test, make sure the following condition is met: The engine switch illumination is off (15 seconds or more have elapsed since it turned from on to off) and the engine switch is on (ACC) or on (IG), or the engine is running.

Tester Display

Test Part

Control Range

Diagnostic Note

Power/Engine SW Light

Engine switch illumination

OFF/ON

When performing this Active Test, make sure the following condition is met:

The engine switch illumination is off (15 seconds or more have elapsed since it turned from on to off) and the engine switch is on (ACC) or on (IG), or the engine is running.

OK:

Engine switch illumination comes on.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT ENGINE SWITCH

(a) Remove the engine switch.

for 2TR-FE (See page )
for 2GR-FKS (See page )

(b) Inspect the engine switch.

for 2TR-FE (See page )
for 2GR-FKS (See page )

OK:

Engine switch illumination is normal.

Result

Result	Proceed to
OK	A
NG (for 2TR-FE)	B
NG (for 2GR-FKS)	C

REPLACE ENGINE SWITCH

3.	CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

(a) Disconnect the C29 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the E28 engine switch connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E28-9 (SWIL) - C29-17 (SWIL)	Always	Below 1 Ω
E28-6 (AGND) - C29-12 (AGND)	Always	Below 1 Ω
E28-9 (SWIL) - Body ground	Always	10 kΩ or higher
E28-6 (AGND) - Body ground	Always	10 kΩ or higher

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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