TSRM/MK4 Supra/Repair Manual
Repair ManualWiring Diagrams
p.191
BE/Body Electrical Systems192 / 203
p.193
INSPECTION PROCEDURE — MK4 Supra Body Electrical Systems, page 192
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BE–192 BODY ELECTRICAL SYSTEM – CRUISE CONTROL SYSTEM INSPECTION PROCEDURE 1 Check operation of starter. C Check that the starter operates normally and that the engine starts. OK NG Proceed to engine troubleshooting (See page EG–381 or EG–487.) 2 Input signal check. P (1) See input signal check on page BE–169. Shifiting into (2) Check the indicator light when shifting into ex– except D range cept D position. ON OK The indicator light goes off when shifting into except D OFF range. NG OK Proceed to next circuit inspection shown on matrix chart (See page BE–170). 3 Check voltage between terminal D of ECU connector and body ground. ON P Remove ECU with connectors still connected. C (1) Turn ignition switch ON. (2) Measure voltage between terminal D of ECU connector and body ground, when shifting into P, N position and other positions. V OK Shift Position Voltage D D range 10 – 14 V Other ranges Below 1 V BE3840 NO8768 NG OK Proceed to next circuit inspection shown on matrix chart (See page BE–170). 4 Check for open in harness and connector between ECU and ST fuse (See page IN–30). OK NG Repair or replace harness or connector. Check and replace ECU.