Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Inspection

INSPECTION

PROCEDURE

1. INSPECT AIR CONDITIONING CONTROL ASSEMBLY

(a) Check the blower switch resistance.

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

Text in Illustration

*a

Component without harness connected

(Air Conditioning control assembly)

*b

Blower Switch OFF Position

*c

Blower Switch LO Position

*d

Blower Switch M1 Position

*e

*Blower Switch M2 Position

*f

Blower Switch Hi Position

Standard Resistance:

Tester Connection

Blower Switch Position

Specified Condition

2 (LO) - 3 (HI) - 4 (M2) - 6 (BGND) - 7(M1)

Blower switch: OFF

10 KΩ or higher

2 (LO) - 6 (BGND)

Blower switch: LO

Below 1 Ω

2 (LO) - 6 (BGND) - 7 (M1)

Blower switch: M1

Below 1 Ω

2 (LO) - 4 (M2) - 6 (BGND)

Blower switch: M2

Below 1 Ω

2 (LO) - 3 (HI) - 6 (BGND)

Blower switch: HI

Below 1 Ω

If the result is not as specified, replace the air conditioning control assembly.

(b) Check the operation.

(1) Apply battery voltage across terminals 14 (IG+) and 1 (GND).

(2) Connect the positive (+) tester probe of a voltmeter to terminal 2 (AMSW) and negative (-) tester probe to terminal 1 (GND), then check the voltage.

Text in Illustration

*a

Component without harness connected

(Air Conditioning control assembly)

*b

0° (MAX A/C)

*c

120°

*d

240° (MAX HOT)

Standard Voltage:

Angle (Position)

Specified Condition

0° (MAX A/C)

0 to 0.4 V

120°

6.3 to 7.2 V

240° (MAX HOT)

13 to 13.5 V

If the result is not as specified, replace the air conditioning control assembly.

(c) Check the operation.

(1) Apply battery voltage across terminals 14 (IG+) and 1 (GND).

(2) Connect the positive (+) tester probe of a voltmeter to terminal 3 (MSET) and negative (-) tester probe to terminal 1 (GND), then check the voltage.

Text in Illustration

*a

Component without harness connected

(Air Conditioning control assembly)

*b

DEF

*c

FACE

*d

B/L

*e

*FOOT

*f

FOOT/DEF

Standard Voltage:

Angle (Position)

Specified Condition

0° (FACE)

13.3 to 13.5 V

60° (B/L)

10.1 to 11.0 V

120° (FOOT)

6.3 to 7.2 V

180° (FOOT/DEF)

2.5 to 3.4 V

240° (DEF)

0 to 0.2 V

If the result is not as specified, replace the air conditioning control assembly.

(d) Inspect the illumination.

(1) Connect the positive (+) lead to terminal 6 (ILL+) and negative (-) lead to terminal 9 (ILL-), and check that the illuminations comes on.

OK:

Illuminations comes on.

If the result is not as specified, replace the air conditioning control assembly.

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