DTC 79

id070200804700

DTC 79 | Rear evaporator temperature sensor (past)
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POSSIBLE CAUSE | • Rear evaporator temperature sensor malfunction • Open or short circuit between rear evaporator temperature sensor and front climate control unit

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | • Inspect rear evaporator temperature sensor. (See REAR EVAPORATOR TEMPERATURE SENSOR INSPECTION.) • Is it okay? | Yes | Go to the next step.
No | Replace rear evaporator temperature sensor. (See REAR EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION.)
2 | • Disconnect front climate control unit connector (16-pin) and rear evaporator temperature sensor connector. • Is there open circuit between following terminals of front climate control unit connector (16-pin) and rear evaporator temperature sensor connector? ― 2J—B ― 2P—A | Yes | Repair wiring harness.
No | Go to the next step.
3 | • Is there short circuit to ground between terminal 2J of front climate control unit connector (16-pin) and terminal B of rear evaporator temperature sensor connector? | Yes | Repair wiring harness.
No | Connect front climate control unit connector, then go to the next step.
4 | • Turn ignition switch to ON position. • Measure voltage at terminal 2J of front climate control unit connector (16-pin). • Is voltage approx. 5 V? | Yes | This system is normal at present. (Erase the past failure from memory.)
No | Inspect the connection of the front climate control unit connector.