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 description on activating under
"Activate" menu
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.
