DTC B1145 / B1146
Precautions: Precautions for Diagnosing Trouble · Precautions for Control Systems · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
B1145: A/C Evaporator Temperature Sensor Circuit High Evaporator temperature sensor signal circuit voltage is higher than 4.85 V for specified time continuously. |
•Evaporator temperature sensor circuit / connector
•Evaporator temperature sensor •BCM |
|
B1146: A/C Evaporator Temperature Sensor Circuit Low Evaporator temperature sensor signal circuit voltage is lower than 0.15 V for specified time continuously. |
Circuit Diagram
| [A]: | BCM connector (View: [a]) | A2: | Evaporator temperature sensor ground circuit | 2. | BCM |
| A1: | Evaporator temperature sensor signal circuit | 1. | Evaporator temperature sensor |
DTC Confirmation Procedure
1)Set ignition “ON”.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Parameter check
1)Connect SUZUKI scan tool to DLC when ignition is “OFF”.
2)Set ignition “ON”.
3)Check “A/C Evaporator Temp” displayed on SUZUKI scan tool.
Is check result OK?
|
Check for intermittent trouble.
|
Go to Step 2.
|
| 2 |
Evaporator temperature sensor circuit check
1)Check that ignition is “OFF”.
2)Disconnect evaporator temperature sensor and “G04” connectors.
3)Check for proper terminal connection to evaporator temperature sensor and “G04” connectors.
4)If connections are OK, check the following points.
•Resistance of “A1” and “A2” circuits: less than 1 Ω
•Resistance between “A1” circuit and ground: infinity •Resistance between “A1” and “A2” circuit terminals at evaporator temperature sensor connector: infinity •Voltage of “A1” and “A2” circuits: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 3.
|
Repair or replace defective wire harness.
|
| 3 |
Evaporator temperature sensor check
1)Check evaporator temperature sensor.
•Manual A/C model:
•Auto A/C model: Is check result OK?
|
Replace BCM and recheck DTC.
|
Replace evaporator temperature sensor.
•Manual A/C model:
•Auto A/C model: |