Checking Program
| Trouble Code | Trouble Code Storage when... | |
|---|---|---|
| 171 | Trouble code is stored if a short circuit to battery +, Ter. 30 or a lead interruption is recognized in the ambient temperature sensor circuit. | |
| Notes on Trouble-shooting: | Nominal Value: | Cause of Fault: |
| (If nominal value is not attained) |
· Disconnect connection plug from ambient temperature sensor P 13
| · Using multimeter, measure resistance: between the two terminals of ambient temperature sensor P 13 | -30 °C/-22 °F |
83.2 to 94.6 k
-20 °C/-4 °F
47.1 to 50.1 k
-10 °C/+ 14 °F
| 26.8 to 28.6 k | · Check wiring harness plug for corrosion |
|---|---|
| · Ambient temperature sensor P 13 defective | |
| 0 °C/32 °F |
15.8 to 16.9 k
10 °C/50 °F
9.6 to 10.3 k
20 °C/68 °F
6 to 6.5 k
30 °C/86 °F
3.9 to 4.2 k
40 °C/l04 °F
2.6 to 2.8 k
50 °C/l22 °F
1.7 to 1.9 k
· Measure voltage:
from: connection plug P 13
(cable colour: BLWS: blue/white)
to: connection plug P 13
| (cable colour: BL: blue) | 4.5 V to 5.5 V | Voltage greater than 5.5 V |
· Short circuit in wiring harness
from: plug X 23 Ter. 4
to: battery +
· Short circuit in wiring harness
from: plug X 23 Ter. 2
to: battery +
· TID defective.
| Voltage less than 4.5 V |
· Short circuit in wiring harness
from: plug X 23 Ter. 4
to: ground
· Lead interruption
from: plug X 23 Ter. 4
to: connection plug P 13
(cable colour: BLWS: blue/white)
| · Lead interruption. |
from: plug X 23 Ter. 2
to: connection plug P 13
(cable colour: BL: blue)
· Remove TID
· Disconnect TID plug X 23
· Voltage:
| from: wiring harness plug X 23 Ter. 4 and Ter. 2 | ||
|---|---|---|
| to: ground | 0 V | · Short circuit in wiring harness |
from: wiring harness plug X 23 Ter. 4 and Ter. 2
to: battery +
· Using multimeter, measure resistance:
| from: plug X 23 Ter. 4 | ||
|---|---|---|
| to: plug X 23 Ter. 2 | ¥ | · Short circuit in wiring harness |
from: plug X 23 Ter. 4
to: plug X 23 Ter. 2
| If nominal values are attained | · TID defective |
· If the ambient temperature display adapts only very slowly to the current ambient temperature, the following checks must be carried out.