AC–21 AIR CONDITIONING SYSTEM – TROUBLESHOOTING Trouble Area | Memory*5 | See page • Room temp. sensor • Harness or connector between room temp. sensor and A/C amplifier • A/C amplifier (8.5 min. or more) | AC–28 • Ambient temp. sensor • Harness or connector between ambient temp. sensor and A/C amplifier • A/C amplifier (8.5 min. or more) | AC–30 • Evaporator temp. sensor • Harness or connector between evaporator temp. sensor and A/C amplifier • A/C amplifier (8.5 min. or more) | AC–32 • Engine coolant temp. sensor • Harness or connector between coolant temp. sensor and A/C amplifier • A/C amplifier (8.5 min. or more) | AC–34 • Solar sensor • Harness or connector between sensor and A/C amplifier • A/C amplifier (8.5 min. or more) | AC–36 • Compressor drive belt • Compressor lock sensor • Compressor • Harness and connector between A/C amplifier and compressor, compressor lock sensor • A/C amplifier — | AC–38 • Pressure switch • Harness or connector between pressure switch and A/C amplifier • Refrigerant pipe line • A/C amplifier — | AC–40 • Air mix damper position sensor • A/C amplifier • Harness or connector between air mix damper position sensor and A/C amplifier (1 min. or more) | AC–42 • Air outlet damper position sensor • A/C amplifier • Harness or connector between max cool damper position sensor and A/C amplifi- (1 min. or more) | AC–48 • Air mix damper control servo motor • Air mix damper position sensor • Harness and connector between A/C amplifier and air mix position sensor • Harness and connector between A/C amplifier and air mix damper control servo motor • A/C amplifier (15 secs. or more) | AC–42 AC–44 • Air outlet damper control servo motor • Air outlet damper position sensor • Harness and connector between A/C amplifier and air outlet position sensor • Harness and connector between A/C amplifier and air outlet damper motor • A/C amplifier (15 secs. or more) | AC–48 AC–50 HINT: *4 Compressor lock (A/C light blink) is indicated only for a current malfunction. (See page AC–38) To confirm the trouble indication, perform the following steps. (1) With the engine ON, enter the trouble code check mode. (2) Press the R/F switch to enter actuator check mode, and set the operation to Step No. 3. (3) Press the AUTO switch to return to diagnostic sensor check mode. (4) The A/C light starts to blink after approx. 3 secs. *5 The A/C amplifier memorizes the trouble code of the respective malfunction when it occurs for period of time indicated in the brackets.