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Cold Mixture Heater Relay

Check that continunity is present between terminals No. 1 and 2. No continuity should be present between terminals No. 3 and 4.
On Pickup, also check that there is no continuity between terminals No. 1 and 4. See Fig 3 & 44. On all models, apply battery voltage to terminals No. 1 and 2. See Fig 1, Figure, Figure or Figure.
Continunity should be present between terminals No. 3 and 4. For location of relay location, See COLD MIXTURE RELAY LOCATION table.

COLD MIXTURE RELAY LOCATION

Model	Relay Location
Corolla	Left Fender Apron
Pickup	No. 2 Relay Block, Right Fender Apron
Tercel	Near Wiper Motor

Fig 1: Checking Cold Mixture Heater Relay W/O Voltage (Corolla)

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Fig 2: Checking Cold Mix Heater Relay W/ Voltage Applied (Corolla)

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Fig 3: Checking Cold Mixt Heater Relay W/O Voltage (Pickup)

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Fig 4: Chk Cold Mix Heater Relay W/ Voltage Applied (Pickup)

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Fig 5: Checking Cold Mixture Heater Relay W/O Voltage (Tercel)

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Fig 6: Checking Cold Mix Heater Relay W/ Voltage Applied (Tercel)

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Fig 7: Cold Mixture Heater Components & Parameters (Corolla)

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Fig 8: Cold Mixt Heater Components & Parameters (Pickup)

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Fig 9: Cold Mixture Heater Components & Parameters (Tercel)

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