1995 TOYOTA SUPRA Service Repair Manual

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Page 1937 of 2543

TOYOTA SUPRA 1995 Service Repair Manual CIRCUIT DESCRIPTION (Contd) DIAGNOSTIC TROUBLE CODE DETECTION DRIVING PATTERN Purpose of the driving pattern. (a) To simulate diagnostic trouble code detecting condition after diagnostic trouble cod

Page 1938 of 2543

TOYOTA SUPRA 1995 Service Repair Manual See page EG±421 (1) Disconnect the EFI No.1 fuse (30A) for 10 sec. or more, with IG switch OFF. Initiate test mode (Connect terminal TE2 and E1 of data link connector 2 with IG switch OFF). (2) S

Page 1939 of 2543

TOYOTA SUPRA 1995 Service Repair Manual (1) Warm up engine to normal operating temperature. (2) Using SST, connect terminal TE1 and E1 of data link connector 1. SST 09843±18020 (3) Connect positive probe to terminal VF1, VF2 and negative p

Page 1940 of 2543

TOYOTA SUPRA 1995 Service Repair Manual EG±47 2 IG±4 EG±33 EG±190 EG±457 EG±438 EG±424 EG±426 Check for open and short in harness and connector between engine control mod- ule and (main heated*) oxygen sensor, engine control module

Page 1941 of 2543

TOYOTA SUPRA 1995 Service Repair Manual EG±4 72 IG±4 EG±33 EG±19 0 EG±457 EG±438 EG±424 EG±426 (See page EG±9). Check each item found to be a possible cause of problem. Repair or replace. Check each circuit found to be a possible c

Page 1942 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 27 Sub Heated Oxygen Sensor Circuit (Only for California spec.) CIRCUIT DESCRIPTION The sub heated oxygen sensor is installed on the exhaust pipe. Its construction and operation is the same as the

Page 1943 of 2543

TOYOTA SUPRA 1995 Service Repair Manual CIRCUIT DESCRIPTION (Contd) DIAGNOSTIC TROUBLE CODE DETECTION DRIVING PATTERN Purpose of the driving pattern. (a) To simulate diagnostic trouble code detecting condition after diagnostic trouble cod

Page 1944 of 2543

TOYOTA SUPRA 1995 Service Repair Manual (See page EG±404) INSPECTION PROCEDURE HINT: When other codes are output in addition to 27 at the same time, check the circuits for other codes first. Check voltage between terminal HT3 of engine con
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