TSRM/MK4 Supra/Repair Manual
Repair ManualWiring Diagrams
p.180

BE/Body Electrical Systems — Check control switch., page 181

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p.182
Check control switch. — MK4 Supra Body Electrical Systems, page 181
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Page text (OCR transcript)
BE-181
BODY ELECTRICAL SYSTEM – CRUISE CONTROL SYSTEM

3 Check control switch.

Disconnect

P (1) Remove steering wheel center pad.
(2) Disconnect control switch connector (See page RS Section).

C Measure resistance between terminals 3 and 4 of control switch connector when control switch is operated.

OK
Switch position          Resistance
Neutral                  1 MΩ or higher
RES/ACC                  60 – 80 Ω
SET/COAST                180 – 220 Ω
CANCEL                   400 – 440 Ω

Hint When diagnostic trouble code 34 is displayed, carefully check that resistance is always ∞ in neutral position, particularly when switching between RES/ACC and SET/COAST.

BE4061
N08856

OK                       NG ) Replace cruise control switch.

4 Check for open and short in harness and connector between ECU and control switch (See page IN–30).

OK                       NG ) Repair or replace harness or connector.

Check and replace ECU.