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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> On-Board Diagnostic [HVAC System - Full-Auto Air Conditioner System] >> DTC B13AA:71 [Full-Auto Air Conditioner] >> Diagnostic Procedure

Diagnostic Procedure

STEP INSPECTION ACTION
1 INSPECT AIR MIX ACTUATOR CONNECTOR 
  • Switch the ignition to off.
  • Disconnect the negative battery cable.
  • Disconnect the air mix actuator connector.
  • Inspect the connector and terminals (corrosion, damage, pin disconnection).
  • Are the connector and terminals normal?
 Yes Go to the next step.
No Repair/replace the connector or terminal.
After repair procedure, go to the next step.
2 INSPECT AIR MIX ACTUATOR OPERATION 
  • Disconnect the air mix actuator connector.
  • Apply battery positive voltage and connect the ground to the air mix actuator terminals 1L and 1N, and then inspect the air mix actuator.
  • Does the air mix actuator operate?
 Yes Connect the connector, then go to Step 4.
No Go to the next step.
3 INSPECT AIR MIX LINK OPERATION 
  • Remove the air mix actuator.
  • Operate the air mix link manually.
  • Does the air mix link operate smoothly?
 Yes Replace the air mix actuator.
(See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
Go to the next step.
No Replace the air mix link and the air mix crank.
Go to the next step.
4 INSPECT AIR MIX ACTUATOR CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND 
  • Disconnect the climate control unit connector.
  • Apply battery positive voltage and connect the ground to the climate control unit terminal 1L and 1N, and then inspect the air mix actuator.
  • Does the air mix actuator operate?
 Yes Go to the next step.
No Repair/replace the malfunctioning vehicle wiring harness.
After repair procedure, go to the next step.
5 VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION 
  • Inspect the connector and terminals (corrosion, damage, pin disconnection).
  • Are the connector and terminals normal?
 Yes Go to the next step.
No Repair/replace the malfunctioning vehicle wiring harness, connector, or terminal.
After repair procedure, go to the next step.
6 VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN  Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
7 VERIFY THAT NO OTHER DTCs ARE PRESENT 
  • Verify other DTCs displayed.
  • Are any other DTCs output?
 Yes Perform the corresponding DTC inspection.
No DTC troubleshooting completed.
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