|
|
TEST ACTION APPLICABILITY 5 Ignition on, engine not running. t, read the TP Sensor voltage. NOTE: The throttle must be against the stop. All Yes → Go To 6 No → Check for a binding throttle condition. If OK, replace the Throttle Position Sensor. 6 With the DRBIII t, read the TP Sensor voltage. While monitoring the DRBIII t, slowly open and close the throttle. Does the voltage increase and decrease smoothly? All Yes → Go To 7 No → Replace the Throttle Position Sensor. Perform POWERTRAIN VERIFICATION TEST VER - 5. 7 Turn the ignition off. t in Sensors, read the MAP Sensor vacuum value. Is the DRB reading within 1 9 of the Vacuum Gauge reading? All Yes → Go To 8 No → Replace the MAP Sensor. Perform POWERTRAIN VERIFICATION TEST VER - 5. NOTE: Remove the vacuum gauge before continuing. 8 NOTE: For this test to be valid, the thermostat must be operating correctly. t, read the ECT Sensor value. If the engine was allowed to sit overnight (cold soak), the temperature value should be a sensible value that is All Yes → Go To 9 No → Replace the Engine Coolant Temperature Sensor. Perform POWERTRAIN VERIFICATION TEST VER - 5. 109 DRIVEABILITY - NGC P0172-FUEL SYSTEM 1/1 RICH — Continued |