P1640
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE goes on immediately.
Engine will not start.
Misfiring can occur before trouble code is generated.
Main Relay Circuit. No Voltage to Control Module pin 1.
Fault symptoms
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CHECK ENGINE goes on immediately.
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Misfiring can occur before trouble code is generated.
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Conditions
The following conditions apply for this DTC:
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Crankshaft rotating and main relay voltage below 5 V for 1 sec.
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Diagnostic help
Fault diagnosis concerns electrical fault in connecting leads or in the relay.
Functions in the diagnostic tool related to the fault:
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Main relay voltage, unit V.
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See also description of test readings,
, for more information.
Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.
