P1657
Read the instructions below then
start the fault diagnostic procedure.
Symptom: A/C not working.
A/C Relay Coil Circuit. Short to B+.
Fault symptoms
Conditions
The following conditions apply for this DTC:
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A/C request has previously been output to the bus (car with A/C).
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Ignition ON and output voltage above 2 V when the output is active.
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Conditions are met for 1 second.
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Diagnostic help
Fault diagnosis concerns electrical faults in connecting cables or in the relay.
Diagnostic tool functions related to this fault are:
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Activation of output for A/C relay.
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See also the description of activations under
Menu "Activation"
for more information.
Check the wiring
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Note
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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.
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