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A/C Signal Circuit Check: Troubleshooting

DTC TROUBLESHOOTING CHART

Step Action Yes No
1 A/C switch signal circuit check 
  1. Remove ECM (PCM) cover.
  2. Check voltage between "E61-28" and ground under the following conditions.

    A/C switch signal specifications 

    Ignition switch ON and A/C switch and/or heater blower switch OFF: 10 - 14 V 

    Ignition switch ON and both A/C switch and heater blower switch ON: 0 - 1.5 V 


Are check results as specified? 		 A/C signal circuit is in good condition. Faulty "GRN/BLK" wire, evaporative temperature is bellow 2.5 °C, 36.5 ° or faulty A/C system.
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