Air Conditioning System

AIR CONDITIONING SYSTEM: 17: Rear Evaporator Temperature Sensor Circuit

DTC 17 - Rear Evaporator Temperature Sensor Circuit

DESCRIPTION

This sensor detects the rear evaporator temperature and sends the appropriate signals to the A/C amplifier.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT AIR CONDITIONING AMPLIFIER

(a) Remove the A/C amplifier with the connectors still connected
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:

Result:

C -- REPLACE AIR CONDITIONING AMPLIFIER
B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- Continue to next step.
2. INSPECT COOLER NO.2 THERMISTOR (REAR EVAPORATOR TEMP. SENSOR)

(a) Remove the cooler No. 2 thermistor
(b) Disconnect the connector from the cooler No. 2 thermistor.

NG -- REPLACE COOLER NO.2 THERMISTOR (REAR EVAPORATOR TEMP. SENSOR)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (COOLER NO. 2 THERMISTOR - A/C AMPLIFIER)
(a) Check for open and short circuit in the harness and the connector between the cooler No. 2 thermistor (rear evaporator temp. sensor) and the A/C amplifier Electronic Circuit Inspection Procedure.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK DTC
(a) Start up the DTC check mode.
(b) Check that DTC 17 is not output again.
Result:

OK -- SYSTEM IS OK
NG -- REPLACE AIR CONDITIONING AMPLIFIER