P1641
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Engine will not start.
CHECK ENGINE.
Misfiring before trouble code generated.
Fuel Pump Relay. No Voltage to Fuel Pump and O2S Preheating.
Fault symptoms
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Misfiring before trouble code generated.
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On-Board Diagnostics
Type of diagnosis:
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Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.
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Enable criteria:
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Engine running. Main relay voltage exceeding 10V. O2S1 and O2S2 preheating active.
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Fault criteria:
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More than 15 misfires. O2S1 and O2S2 preheating current below 10mA for more than 1.5 s.
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Dependents:
System reaction to a fault:
OK report:
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Enable criteria fulfilled and fault criteria not fulfilled within 60 s.
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Fault handling:
(See section
Fault handling III, other emission-related components and functions
for more information.)
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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Activate fuel pump relay output.
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See also the description of activations under
Menu "Activation"
for more information.
Checking the wiring
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Note
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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.
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