DTC Troubleshooting: 16

DTC 16:  An Open in the A/C Pressure Sensor Circuit

1.Disconnect the A/C pressure sensor 3P connector.

2.Disconnect the heater control panel 36P connector.

3.Check for continuity between the No. 9 terminal of the heater control panel 36P connector and No. 2 terminal of the A/C pressure sensor 3P connector.

 

Is there continuity?


YES - Go to 4.


NO - Repair open in the wire between the heater control panel and the A/C pressure sensor.n


4.Reconnect the heater control panel 36P connector.

5.Turn the ignition switch ON (II).

6.Check for voltage between the No. 1 and No. 3 terminals of the A/C pressure sensor 3P connector.There should be 5 V.

 

Is the voltage as specification?


YES - Replace the  A/C pressure sensor.n


NO - Go to 7.


7.Check for voltage between the No. 11 terminal of the heater control panel 36P connector and body ground. There should be 5 V.

 

Is the voltage as specification?


YES - Repair open in the wire between the heater control panel and the A/C pressure sensor.n


NO - Substitute a known-good heater control panel, and recheck. If the symptom/indication goes away, replace the original heater control panel.n