Lexus IS250 · Service Manual BODY ELECTRICAL

INSPECTION

Inspection


INSPECT STEERING PAD SWITCH (w/ Navigation System)

  1. Disconnect the steering pad switch assembly connector.

    E119670E02

  1. Measure the resistance according to the values in the table below.

    Standard resistance:
    Tester connection
    		 Condition
    		 Specified condition
    AU1 - EAU
    		 No switch is pushed
    		 Approx. 100 kΩ
    AU1 - EAU
    		 SEEK+ switch: push
    		 Approx. 0 Ω
    AU1 - EAU
    		 SEEK- switch: push
    		 Approx. 0.3 kΩ
    AU1 - EAU
    		 VOL+ switch: push
    		 Approx. 1 kΩ
    AU1 - EAU
    		 VOL- switch: push
    		 Approx. 3.2 kΩ
    AU2 - EAU
    		 No switch is pushed
    		 Approx. 100 kΩ
    AU2 - EAU
    		 MODE switch: push
    		 Approx. 0 Ω
    AU2 - EAU
    		 VOICE switch: push
    		 Approx. 3.2 kΩ
    AU2 - EAU
    		 ON HOOK switch: push
    		 Approx. 0.3 kΩ
    AU2 - EAU
    		 OFF HOOK switch: push
    		 Approx. 1 kΩ

    If the result is not as specified, replace the steering pad switch.


INSPECT STEERING PAD SWITCH (w/o Navigation System)

  1. Disconnect the steering pad switch assembly connector.

    E121258E05

  1. Measure the resistance according to the values in the table below.

    Standard resistance:
    Tester connection
    		 Condition
    		 Specified condition
    AU1 - EAU
    		 No switch is pushed
    		 Approx. 100 kΩ
    AU1 - EAU
    		 SEEK+ switch: push
    		 Approx. 0 Ω
    AU1 - EAU
    		 SEEK- switch: push
    		 Approx. 0.3 kΩ
    AU1 - EAU
    		 VOL+ switch: push
    		 Approx. 1 kΩ
    AU1 - EAU
    		 VOL- switch: push
    		 Approx. 3.2 kΩ
    AU2 - EAU
    		 No switch is pushed
    		 Approx. 100 kΩ
    AU2 - EAU
    		 MODE switch: push
    		 Approx. 0 Ω

    If the result is not as specified, replace the steering pad switch.

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