DTC B1503 / B1562
Precautions: Precautions for Diagnosing Trouble · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
B1503: Evaporator Temperature Sensor and/or Its Circuit Malfunction HVAC control module receives invalid data of evaporator temperature sensor from BCM continuously through CAN communication line. |
•Evaporator temperature sensor circuit
•Evaporator temperature sensor •HVAC control module •BCM |
|
B1562: Outside Air Temperature Sensor and/or Its Circuit Malfunction HVAC control module receives invalid data of outside air temperature sensor from BCM continuously through CAN communication line. |
•Outside air temperature sensor circuit
•Outside air temperature sensor •HVAC control module •BCM |
DTC Confirmation Procedure
NOTE:
Check that the following condition is satisfied in this procedure.
•U0073 and/or U0140 are not detected
1)Start engine and operate A/C system.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
DTC check
1)Check BCM for the following DTCs.
B1503: B1145 and/or B1146 B1562: B1141 and/or B1142 Is there any DTC(s) detected?
|
Go to applicable DTC diagnosis flow.
|
Replace HVAC control module and recheck DTC.
|