DTC P0073

DTC P0073  : Outside Air Temperature Sensor A Circuit High

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Turn the vehicle to the ON mode, and wait 8 seconds.

   -5. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC
   P0073 Outside Air Temperature Sensor A Circuit High

   DTC (PGM-FI)

   Is DTC P0073 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at outside air temperature sensor A and the climate control unit. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot .

2. Outside air temperature sensor A check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Outside air temperature sensor A 2P connector

   Outside air temperature sensor B 2P connector

   -3. Connect the connector of outside air temperature sensor B to outside air temperature sensor A.

   -4. Turn the vehicle to the ON mode.

   -5. Clear the DTC with the HDS.

   -6. Turn the vehicle to the OFF (LOCK) mode.

   -7. Turn the vehicle to the ON mode, and wait 8 seconds.

   -8. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC
   P00DC Outside Air Temperature Sensor B Circuit High

   DTC (PGM-FI)

   Is DTC P00DC indicated?

   YES 

   Replace the outside air temperature sensor A .

   NO 

   Go to step 3.

3. Open wire check (TAM line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Climate control unit connector A (32P)

   -3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Outside air temperature sensor A 2P connector: disconnected
   	Climate control unit connector A (32P): disconnected
   Test point 1	Climate control unit connector A (32P) No. 26
   Test point 2	Outside air temperature sensor A 2P connector (female terminals) No. 2:

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Go to step 4.

   NO 

   Repair an open in the TAM wire between the climate control unit (A26) and outside air temperature sensor A.

4. Open wire check (SENSOR COM line)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Outside air temperature sensor A 2P connector: disconnected
   	Climate control unit connector A (32P): disconnected
   Test point 1	Climate control unit connector A (32P) No. 12
   Test point 2	Outside air temperature sensor A 2P connector (female terminals) No. 1:

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The SENSOR COM wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good climate control unit , then recheck. If DTC P0073 goes away and the climate control unit was substituted, replace the original climate control unit .

   NO 

   Repair an open in the SENSOR COM wire between the climate control unit (A12) and outside air temperature sensor A.