P1487
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Incorrect radiator fan function.
Cooling Fan 1 Control Circuit, Open
Fault symptoms
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Incorrect radiator fan function.
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On-Board Diagnostics
Type of diagnosis:
Enable criteria:
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Radiator fan circuit NOT activated.
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Fault criteria:
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No voltage on the control module output for more than 0.6 s.
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System reaction to a fault:
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Radiator fan speed set to LOW.
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OK report:
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Fault criteria not fulfilled for 0.6 s.
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Check the wiring
A fault in the control module's female connector can generate a DTC. Check the contact for oxidation, dislodge pins and pin clamping force.
Jiggle the leads and in-line connectors at various points and in different directions to detect any intermittent breaks or short circuits in the wiring. Observe the multimeter, test lamp or diagnostic tool while doing this. Check switches, connectors and crimp connections for oxidation, dislodged pins and pin clamping force.
Diagnostic help
Diagnostic tool functions related to this fault are:
For more information, see also:
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"Read Values" menu
for a description of read values.
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"Activate" menu
for a description of applications.
