1995 TOYOTA SUPRA Service Repair Manual

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Page 57 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION PROCEDURE Check voltage between terminal ACC of A/C amplifier connector and body ground. Remove the A/C amplifier with connector still connected Voltage: Battery positive voltage 1. Turn ig

Page 58 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Heater Relay Circuit CIRCUIT DESCRIPTION The heater relay is switched on by signals from the A/C amplifier and switches power to the blower motor. AC±58± AIR CONDITIONING SYSTEMTROUBLESHOOTING

Page 59 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Check voltage between terminal HR of A/C amplifier connector and body ground. Check heater relay. Proceed to next circuit inspection shown on matrix chart (See page AC±26). Check HTR fuse. Check and

Page 60 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Blower Motor Circuit CIRCUIT DESCRIPTION This is the power source for the blower motor. INSPECTION PROCEDURE Check voltage between terminal BLW of A/C amplifier connector and body ground. Proceed to n

Page 61 of 2543

TOYOTA SUPRA 1995 Service Repair Manual (See page AC±99). Check blower motor. Go to step Replace blower motor. Check blower motor control relay. Replace blower motor control relay. Repair or replace harness or connector Remove blower motor

Page 62 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Compressor Circuit CIRCUIT DESCRIPTION The A/C amplifier outputs the magnetic clutch ON signal from terminal MGC to the ECM. When the ECM re- ceives this signal, it sends a signal from terminal ACMG a

Page 63 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Check voltage between terminal A/C IN of A/C amplifier connector and body ground. Check air conditioning compressor magnetic clutch. Go to step Check for open and short in harness and connector betwee

Page 64 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Go to step Check and replace ECM. Check voltage between terminal A/C of ECM and body ground. Check voltage between terminal MGC of A/C amplifier connector and body ground. Magnetic ClutchVoltage ON
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