P1640
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Engine will not start.
CHECK ENGINE.
Possible misfiring before diagnostic trouble code is generated.
Main Relay Circuit. No Voltage to Control Module pin 1.
Fault symptoms
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Possible misfiring before diagnostic trouble code is generated.
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On-Board Diagnostics
Type of diagnosis:
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Continuous. However, it is interrupted once the fault criteria have been fulfilled and does not restart until the next driving cycle.
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Enable criteria:
(Conditions that must be fulfilled for diagnostics to be performed.)
Fault criteria:
(When enable criteria have been fulfilled, diagnostics will check if the fault criteria have been fulfilled.)
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Main relay voltage below 5V for 1s.
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Dependents:
(Once fault criteria have been fulfilled, a number of other diagnostics must report OK before the diagnostic trouble code can finally be generated.)
System reaction to a fault:
(Once the fault criteria have been fulfilled, certain measures will sometimes be taken.)
OK report:
(This diagnosis may be included as a dependent to another diagnosis and must therefore report OK even if it is continuous. The OK report is also used in fault handling to count down the fault counter.)
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Enable criteria fulfilled and fault criteria not fulfilled within 60s.
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Fault handling:
(Refer to section “Fault diagnosis, general” for more information.)
Diagnostic help
Fault diagnosis concerns an electrical fault in the connecting leads or in the relay.
Diagnostic tool functions related to this fault:
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Main relay voltage, unit V.
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Refer also to the description of readings under ”Fault diagnosis, general” for more information
Check the wiring
Jiggle the wiring harness at several points and in different directions to check if there are intermittent breaks and short-circuits in the leads. Observe the multimeter, test lamp or diagnostic instrument during the test.
