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Trouble Code
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Trouble Code Storage
when...
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171
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Trouble code is stored if a short circuit to battery
+, Ter. 30 or a lead interruption is recognized in the ambient temperature
sensor circuit.
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Notes on Trouble-shooting:
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Nominal Value:
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Cause of Fault:
(If nominal value is not
attained)
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· Disconnect
connection plug from ambient temperature sensor P 13
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· Using multimeter,
measure resistance: between the two terminals of ambient temperature sensor
P 13
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-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
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· Check wiring
harness plug for corrosion
· Ambient
temperature sensor P 13 defective
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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
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· Measure voltage:
from: connection plug P 13
(cable colour: BLWS: blue/white)
to: connection plug P 13
(cable colour: BL: blue)
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4.5 V to 5.5 V
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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.
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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)
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· Lead interruption.
from: plug X 23 Ter. 2
to: connection plug P 13
(cable colour: BL: blue)
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· Remove TID
· Disconnect TID
plug X 23
· Voltage:
from: wiring harness plug X 23 Ter. 4 and Ter. 2
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to: ground
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0 V
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· Short circuit in
wiring harness
from: wiring harness plug X 23 Ter. 4 and Ter. 2
to: battery +
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· Using multimeter,
measure resistance:
from: plug X 23 Ter. 4
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to: plug X 23 Ter. 2
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¥
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· Short circuit in
wiring harness
from: plug X 23 Ter. 4
to: plug X 23 Ter. 2
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If nominal values are attained
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· TID defective
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· If the ambient
temperature display adapts only very slowly to the current ambient
temperature, the following checks must be carried out.
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