B1514

DTC B1514: Air Flow Control Actuator (Motor) and/or Its Circuit Malfunction

Wiring Diagram










DTC Detecting Condition and Trouble Area






DTC Troubleshooting



1.
Was "Air Conditioning System Check" performed?
YES
Go to Step 2.
NO
Go to Air Conditioning System Check:Auto A/C.

2. DTC check

Connect scan tool to DLC with ignition switch turned OFF.
Turn ignition switch to ON position and check DTC.

Is DTC B1512 detected together?
YES
Go to DTC B1512: Air Flow Control Actuator (Position Sensor) and/or Its Circuit Malfunction:Auto A/C.
NO
Go to Step 3.

3. Visual Check

Check if there is any obstruction in operating range of actuator linkage and if actuator linkage operates smoothly.

Is it in good condition?
YES
Go to Step 4.
NO
Obstruction in operating range of actuator linkage, actuator linkage faulty and/or internal fault of HVAC unit.

4. Wire harness check

Turn ignition switch to OFF position.
Disconnect connectors from air flow control actuator and HVAC control module.
Check for proper connection to actuator motor drive circuit terminals of air flow control actuator and HVAC control module connectors.
If OK, check that actuator motor drive circuit of air flow control actuator is as follows.
- Wiring harness resistance of each actuator motor drive circuit is less than 3 ohms
- Insulation resistance of each actuator motor drive circuit is infinity between air flow control actuator connector and vehicle body ground.
- Circuit voltage of each actuator motor drive circuit is 0 - 1 V with ignition switch turned ON

Are they in good condition?
YES
Go to Step 5.
NO
Actuator motor drive circuit(s) is open, short or high resistance.

5. Wire harness check

Check position sensor circuit of air flow control actuator for condition referring to Step 2 of B1512 DTC B1512: Air Flow Control Actuator (Position Sensor) and/or Its Circuit Malfunction:Auto A/C.

Is it in good condition?
YES
Go to Step 6.
NO
Repair or replace.

6. Air Flow control actuator check

Check air flow control actuator for performance referring to Circuit Inspection Air Flow Control Actuator and Its Circuit Inspection:Auto A/C.

Is it in good condition?
YES
Substitute a known-good HVAC control module and recheck.
NO
Replace air flow control actuator.