AC/Air Conditioning — Blinking Light F D Engine Coolant Temperature Sensor Circuit, page 34

AC–34
AIR CONDITIONING SYSTEM – TROUBLESHOOTING

Blinking Light F D Engine Coolant Temperature Sensor Circuit

CIRCUIT DESCRIPTION

This sensor detects the coolant temperature and sends the appropriate signals to the A/C amplifier.
These signals are used for warm up control when the engine is cold.

Diagnostic Sensor Check Detecting Condition | Trouble Area

Open or short in engine coolant temperature sensor circuit. | • Engine coolant temperature sensor
• Harness or connector between engine coolant temperature sensor and A/C amplifier
• A/C amplifier

WIRING DIAGRAM

A/C Amplifier

5 V

Engine Coolant Temp.
Sensor (For A/C System)

LG-R          11          LG-R          16     TW
              IG 1                    A13
2

1
          V-W          4          V-W          9      SG
                        IG 1                    A13

N08816