A/C Signal Circuit Check: Troubleshooting

DTC TROUBLESHOOTING CHART

Step	Action	Yes	No
1	A/C switch signal circuit check Remove ECM cover. Check voltage between "E61-17" 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 °F or faulty A/C system.

Step

Action

Yes

A/C switch signal circuit check

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 °F or faulty A/C system.