Winnebago 1987-1989 LeSharo Service Manual page 158

ENGINE FUEL SYSTEM
ADJUSTMENTS
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~' INTEGRATOI VOLTAGE '-'/
• Remove the tamper-resistant plug (21) for access
to the screw.
To remove the plug:
- Push the plug (50) down completely to prevent it
from rotati ng.
- Drill a 3 mm (1/8") hole in the plug. A steel
stopper (51) inside the plug will prevent the drill
from going too deep. Do not use excessive force.
- Use a threaded extractor tip to pull the plug out.
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• Disconnect the oxygen
(02)
sensor wire harness
connector
• Connect a digital voltmeter to diagnostic
connector terminals
02-2
and
02-7.
NOTE: Battery must have a full charge with all
switches and fans off to ensure no drain or
draw on battery.
Record the voltage. It should be approximately 6-7
volts.
• Start vehicle and allow the engine to reach
operating temperature (when the cooling fans'
must be off while testing.
• Connect the oxygen
(02)
sensor wire harness
connector
• Observe the digital voltmeter and adjust the
bypass screw to obtain the voltage recorded above
pi us + 1 volt.
NOTE: A misadjusted bypass screw can cause a
voltage variance of ...±..3 volts.
Baseline Voltage (Steady)
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l'OLTAGE '-'/
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Integrator Voltage (Variable)
• After the bypass adjustment, check the idle speed
and adjust, if necessary.
• Re-install the tamper-resistant plug.
NOTE: Federal regulation requires that the plug be
replaced after completion of adjustment
operations.
C6·2
51