B1514
DTC B1514: Air Flow Control Actuator and/or Its Circuit Malfunction
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start A/C system and select mode selector at "DEF" position.
4) Select mode selector at "FOOT" position and wait for 1 minute.
5) Check DTC.
DTC Troubleshooting
1. DTC check
Connect scan tool to DLC with ignition switch turned OFF.
Turn ON ignition switch and check DTC.
Is there DTC B1512?
YES -
Go to applicable DTC diag. flow.
NO -
Go to Step 2.
2. 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 3.
NO -
Obstruction in operating range of actuator linkage, actuator linkage faulty and/or internal fault of HVAC unit.
3. Wire harness check
Disconnect connector from air flow control actuator with ignition switch turned OFF.
Check for proper connection to air flow control actuator connector at "GRY/RED" and "GRY/BLK" wire terminals.
If OK, measure voltage between "GRY/RED" wire terminal of air flow control actuator connector and vehicle body ground with ignition switch turned ON.
Is voltage 10 - 14 V?
YES -
Go to Step 7.
NO -
Go to Step 4.
4. Wire harness check
Disconnect connector from HVAC control module with ignition switch turned OFF.
Check for proper connection to HVAC control module connector at "G52-7" and "G52-8" terminals.
If OK, measure resistance between "GRY/RED" wire terminal of air flow control actuator connector and "G52-7" terminal of HVAC control module connector.
Is resistance below 5 ohms?
YES -
Go to Step 5.
NO -
"GRY/RED" wire open or high resistance circuit.
5. Wire harness check
Measure resistance between "GRY/RED" wire terminal of air flow control actuator connector and vehicle body ground.
Is resistance infinity?
YES -
Go to Step 6.
NO -
"GRY/RED" wire shorted to ground circuit.
6. Wire harness check
Measure voltage between "GRY/RED" wire terminal of air flow control actuator connector and vehicle body ground with ignition switch turned ON.
Is voltage 0 V?
YES -
Go to Step 7.
NO -
"GRY/RED" wire shorted to other circuit.
7. Wire harness check
Connect connector to HVAC control module with ignition switch turned OFF.
Measure voltage between "GRY/BLK" wire terminal of air flow control actuator connector and vehicle body ground with ignition switch turned ON.
Is voltage 10 - 14 V?
YES -
Go to Step 11.
NO -
Go to Step 8.
8. Wire harness check
Disconnect connector from HVAC control module with ignition switch turned OFF.
Check for proper connection to HVAC control module connector at "G52-7" and "G52-8" terminals.
If OK, measure resistance between "GRY/BLK" wire terminal of air flow control actuator connector and "G52-8" terminal of HVAC control module connector.
Is resistance below 5 ohms?
YES -
Go to Step 9.
NO -
"GRY/BLK" wire open or high resistance circuit.
9. Wire harness check
Measure resistance between "GRY/BLK" wire terminal of air flow control actuator connector and vehicle body ground.
Is resistance infinity?
YES -
Go to Step 10.
NO -
"GRY/BLK" wire shorted to ground circuit.
10. Wire harness check
Measure voltage between "GRY/BLK" wire terminal of air flow control actuator connector and vehicle body ground with ignition switch turned ON.
Is voltage 0 V?
YES -
Go to Step 11.
NO -
"GRY/BLK" wire shorted to other circuit.
11. Position sensor circuit check
Check air flow control actuator position sensor circuit referring to Step 1 to Step 6 and Step 11 to Step 12 of B1512 DTC B1512-H/L: Air Flow Control Actuator (Position Sensor) and/or Its Circuit Malfunction.
Is it in good condition?
YES -
Go to Step 12.
NO -
Repair circuit.
12. Air flow control actuator check
Check air flow control actuator referring to Inspection Air Flow Control Actuator Inspection.
Is it in good condition?
YES -
HVAC control module faulty.
NO -
Air flow control actuator faulty.