| 1 |
DTC check
- Connect scan tool to DLC with ignition switch turned OFF.
- Turn ON ignition switch and check DTC.
Is there DTC B1512? |
Go to applicable DTC diag. flow. |
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? |
Go to Step 3. |
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 when air flow selector is operation to VENT direction.
Is voltage 10 - 14 V? |
Go to Step 7. |
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 "G51-29" and "G51-30" terminals.
- If OK, measure resistance between "GRY/RED" wire terminal of air flow control actuator connector and "G51-29" terminal of HVAC control module connector.
Is resistance below 5 Ω? |
Go to Step 5. |
"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? |
Go to Step 6. |
"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? |
Go to Step 7. |
"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 when air flow selector is operation to DEF direction.
Is voltage 10 - 14 V? |
Go to Step 11. |
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 "G51-29" and "G51-30" terminals.
- If OK, measure resistance between "GRY/BLK" wire terminal of air flow control actuator connector and "G51-30" terminal of HVAC control module connector.
Is resistance below 5 Ω? |
Go to Step 9. |
"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? |
Go to Step 10. |
"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? |
Go to Step 11. |
"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 DTC B1512: Air Flow Control Actuator (Position Sensor) and/or Its Circuit Malfunction
.
Is it in good condition? |
Go to Step 12. |
Repair circuit. |
| 12 |
Air flow control actuator check
- Check air flow control actuator referring to AIR FLOW CONTROL ACTUATOR INSPECTION .
Is it in good condition? |
HVAC control module faulty. |
Air flow control actuator faulty. |