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TEST ACTION APPLICABILITY 4 Turn the ignition off. All Yes → Replace the Fuel Pump Inlet Strainer. No → 5 If there are no possible causes remaining, view repair. All Repair Replace the Fuel Pump Module. 6 Turn the ignition on t, read the O2 Sensor voltage. Is the voltage between 0.4 to 0.6 volt? All Yes → No → 7 Turn the ignition off. t, actuate the O2 Heater Test. With the DRBIII t, monitor O2 Sensor voltage for at least 2 minutes. Does the voltage stay between 0.4 and 0.6 volt? All Yes → Replace the O2 Sensor. No → 8 Turn the ignition on. t, read TP Sensor voltage. NOTE: The throttle must be against the stop. All Yes → No → Check for a binding throttle condition. If OK, replace the Throttle 9 Turn the ignition on. t, read the TP Sensor voltage. While monitoring the DRBIII t, slowly open and close the throttle. Does the voltage increase and decease smoothly? All Yes → No → Replace the Throttle Position Sensor. 85 DRIVEABILITY - GAS P0171-1/1 FUEL SYSTEM LEAN — Continued |