TSRM/MK4 Supra/Repair Manual
Repair ManualWiring Diagrams
p.193

BE/Body Electrical Systems, page 194

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p.195
Body Electrical Systems — MK4 Supra Body Electrical Systems, page 194
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Page text (OCR transcript)
BE–194
BODY ELECTRICAL SYSTEM – CRUISE CONTROL SYSTEM

2  Check voltage between terminals +B and GND of ECU connector.

ON

P  Remove ECU with connectors still connected.

C  (1)  Turn ignition switch ON.
   (2)  Measure voltage between terminals +B and
        GND of ECU connector.

OK  Voltage:  10 – 14 V

GND        +B

BE3840
N08767

NG                    OK  Proceed to next circuit inspection shown on matrix
                          chart (See page BE–170).

3  Check continuity between terminal GND of ECU connector and body
   ground.

LOCK

C  Measure resistance between terminal GND of cruise
   control ECU connector and body ground.

OK  Resistance:  1 Ω or loss

GND

BE3842
N08788

OK                    NG  Repair or replace harness or connector.

Check and repair harness and connector
between battery and ECU.