Filed Under (Oldsmobile) by admin on 10-04-2011
Refer to Engine Controls Schematics MAF, Secondary Air Injection Pump Bypass Solenoid, IAC and Secondary AIR Pump . Circuit Description The AIR pump is used on this vehicle to lower tail pipe emissions on start-up. The powertrain control module (PCM) grounds the AIR pump relay control circuit, which energizes the AIR pump. The PCM also grounds the AIR solenoid valve control circuit, which energizes the AIR solenoid valve. The AIR solenoid valve opens allowing manifold vacuum to open the AIR control valves. The PCM enables both control circuits when AIR system operation is desired. When the AIR system is active, the AIR pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR control valves replace the conventional check valves. When the AIR system is inactive, the AIR control valves prevent air flow in either direction. DTC P0412 applies to the AIR solenoid control circuit. DTC P0418 applies to the AIR pump relay control circuit. DTC P0410 sets if an air flow problem is detected. The PCM will run two tests using the heated oxygen sensor (HO2S) voltage to diagnose the AIR system. Both tests have two parts. The passive test is performed during regular AIR pump operation. The passive test consists of the following: Passive Test Part 1 When the AIR system is enabled, the PCM monitors the HO2S voltage. If the HO2S voltage goes below a threshold, the PCM interprets this as an indication that the AIR system is operational. Passive Test Part 2 When the AIR system is disabled, the PCM monitors the HO2S voltage. The HO2S voltage should increase above a threshold and switch normally. If both of these tests indicate a pass, no further action is taken. If one of the above tests failed or is inconclusive, the diagnostic will proceed to test two. The active test is performed specifically for diagnostic purposes. Test two consists of the following: Active Test Part 1 During this test the PCM turns the AIR system on during closed loop operation. When the AIR system is activated, the PCM monitors the HO2S voltage. If the AIR system is operating properly, the HO2S voltage should go below a predetermined threshold. Active Test Part 2 The PCM turns the AIR system off. The HO2S voltage should return to above a rich threshold.
Filed Under (Ford) by admin on 01-04-2011
Temperature Blend Door Actuator Removal All vehicles 1. Depower the supplemental restraint system (SRS). For additional information, refer to Supplemental Restraint System (SRS) Depowering and Repowering in Section 501-20B. 2. Remove the floor duct panel. Remove the pin-type retainers and release the expander clip. 3. Remove the RH instrument panel brake. 1. Remove the nut. 2. Remove the bolt. 3. Remove the brace. 4. Remove the LH instrument panel lower nut and position the brace aside. 5. Disconnect the restraints control module (RCM) electrical connector. 6. Remove the RCM and bracket assembly. 1. Remove the bracket retaining bolts. 2. Remove the RCM and bracket assembly. Vehicles equipped with rear airflow duct 7. Cut the rear seat airflow duct along both sides. Fold back carpet. Cut rear seat airflow duct. ? 8. Fold the air duct rearwards. All vehicles 9. Remove the floor duct. 1. Remove the two screws (one each side). 2. Remove the floor duct. 10. Remove the electronic blend door actuator. 1. Disconnect the connector. 2. Remove the screws. 3. Pull down to release the actuator shaft and remove the electronic blend door actuator. Installation All vehicles 1. Install the electronic blend door actuator. 1. Connect the actuator shaft. 2. Install the screws. 3. Connect the connector. 2. Install the floor duct. 1. Install the floor duct. 2. Install the two screws (one each side). Vehicles equipped with rear airflow duct 3. Zip-tie the rear airflow duct to floor duct. 4. Reposition the carpet. All vehicles WARNING: The tightening torque of the restraints control module (RCM) retaining bolts is critical for correct system operation. 5. Install the RCM and bracket assembly. 6. Connect the restraints control module (RCM) electrical connector. 7. Install the LH instrument panel lower nut. 8. Install the RH instrument panel brace. Install the brace. Install the nut. Install the bolt. 9. Install the floor duct panel. Install the pin-type retainers and release the expander clip. 10. Repower the supplemental restraint system (SRS). For additional information, refer to Supplemental Restraint System (SRS) Depowering and Repowering in Section 501-20B.
Filed Under (Buick) by admin on 14-11-2010
Steering Vibration/Shudder/Moan During Parking Maneuvers on Dry Pavement (Install Power Steering Pressure (Inlet) and/or Return (Outlet) Hose Assembly) 1995-99 Buick Riviera 1997-2001 Buick Park Avenue, Ultra 2000-2001 Buick LeSabre 2000-2001 Pontiac Bonneville steering vibration, shudder or moan noise when steering during parking maneuvers on dry pavement. Correction Install a new power steering pressure (inlet) hose assembly on the following vehicles: • 1995-98 Buick Riviera • 1997-98 Buick Park Avenue and Ultra Install a new power steering pressure (inlet) and return (outlet) hose assembly on the following vehicles: • 1999 Buick Riviera • 1999-2001 Buick Park Avenue and Ultra • 2000-2001 Buick LeSabre • 2000-2001 Pontiac Bonneville 1. Verify that the power steering pump reservoir is full. • If fluid level is low, fill and check for leaks. • If power steering system has air in the system, perform the “Bleeding Air from Power Steering System” procedure as described in the Power Steering System sub-section of the Service Manual. Important: When performing the “Bleeding Air from Power Steering System” procedure, it is important that the front of the vehicle is supported by the lower control arms. If the vehicle is not supported by the lower control arms, the procedure may cause the strut bushing to dislocate and cause new concern. Verify that the accessory drive belt is in good condition and that the pulleys are not bent or damaged. Verify proper belt tension and operation of the belt tensioner. Check for power steering hose ground out conditions. Check for good engine idle and correct engine RPM. Check to see that the rear transaxle mount does not have a plastic assembly aid installed which is used 2. 3. 4. 5. 6.
Filed Under (Chevrolet) by admin on 29-08-2010
1. To assemble bearing housing, proceed as follows: a. Using a suitable socket, press bearings into bearing housing. b. Install lock shoe springs, lock shoes and shoe pin into bearing housing. c. Install shoe release lever, spring and pin. d. Install sector drive shaft and snap ring into housing. e. Install lock bolt and engage bolt with sector cam. f. Install rack and spring. Block tooth on rack should engage block tooth on sector. g. Install tilt release lever. h. Install lock bolt spring and retaining bolt. Torque bolt to 35 inch lbs. On C, G and K models, install shift lever spring into housing. On Caballero and El Camino models, install shift lever spring into shift bowl. Install bearing support lock plate and wave washer. On C, G and K models, carefully install shift tube into lower end of steering column jacket. Install wobble plate end of tool J-23073 into upper end of shift tube. Install adapter over end of tube, seating it against the lock plate. Place nut onto threaded portion of tool and pull shift tube into housing. Remove tool. On Caballero and El Camino models, install bearing support thrust washer and retaining ring. Carefully install shift tube into lower portion of steering column jacket. Align shift tube key with shift bowl keyway. Using tool J-23073, pull shift tube into the shift bowl. Install thrust washer and retaining ring. Install actuator rod through support hole between shift bowl and steering column jacket. Install bearing support. Align bearing support “V” with “V” on steering column jacket. Install attaching bolts through support and into lock plate. Torque attaching bolts to 60 inch lbs. Align lower bearing adapter or bushing with notches in steering column jacket. Install lower bearing, bearing reinforcement and retaining clips. Ensure clips align with reinforcement slots on steering column jacket and adapter assembly. Install centering spheres and anti-lash spring onto upper shaft. Install lower steering shaft assembly. On C, G and K models, install steering shaft assembly into shift tube. Install ignition switch actuator rod through shift lever housing. On Caballero and El Camino models, position shift bowl into Park (counterclockwise to stop). Install ignition switch actuator rod between shift bowl and steering column jacket. Assemble bearing housing over steering shaft and engage rack over actuator rod end. On Caballero and El Camino models, position access hole of bearing housing over dimmer switch actuator rod end. While holding the locking shoes in the disengaged position, install bearing housing over steering shaft until pivot pin holes align with holes in support assembly. Install pivot pins. Place bearing housing in the full up (tilt) position. Install tilt lever spring guide, spring and spring retainer. On C, G and K models, proceed as follows: 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17.
Filed Under (Subaru) by admin on 02-01-2011
Removal of Factory Intake 1. 2. Turn the ignition OFF and disconnect the vehicle’s negative battery cable. Loosen and remove the two bolts that secure the air inlet duct to the radiator core support, then remove the air inlet duct. Loosen the clamps at the air cleaner assembly and turbo inlet tube, then remove the stock intake tube. Loosen and remove the two bolts that secure the air cleaner assembly. Pull upwards to remove the air cleaner assembly. Using the bolt removed to secure the ABS control bracket. Loosen and remove the two screws that secure the mass air sensor to the air cleaner assembly, then remove the mass air sensor. Raise the vehicle and support with the jack stands, then remove the front passenger side tire. Remove the five plastic push/screw clips that secure the inner wheel house valance. Remove the 6 screw in push clips that secure the air duct to the lower valance, then remove the air duct. Remove the two remaining push clips that secure the lower valance, then pull the valance down. From inside the apron, remove the push clip that secures the apron to the upper fender. Remove the hex nut that secures the air intake resonator to the inner fender. Loosen and remove the second hex nut that secures the air intake resonator from underneath the vehicle. Remove the air intake resonator. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. Install of Intake 16. Install the reducer and clamps onto the turbo and secure. 17. Loosen and remove the hex bolt on the cam cover. 18. Using the provided allen bolts, secure the mass air sensor into the adapter on the intake tube. 19. Using the allen bolts, secure the mass air sensor into the adapter on the intake tube. 20. Slide the intake tube into the reducer and secure the mass air sensor into the adapter on the intake tube. 21. Tighten the clamp on the intake tube. 22. Install the reducer and clamps onto the intake tube. 23. From underneath the vehicle loosen and remove the hex nut that secures the ABS pump to the inner fender. 24. Slide the cold air tube intake tube from underneath the vehicle into the hole in the inner fender, then line up the bracket with the ABS bolts, and tighten with the nut remove. 25. Slide the reducer onto the cold air intake tube. 26. Install the Bomz Filtercharger onto the cold air intake tube and secure with clamp. 27. Reverse the removal process for the plastic wheelhouse valance and air duct with the stock push clips. 28. Reconnect the mass air sensor electrical connection. 29. Reconnect the negative battery cable and double check to make sure everything is tight before starting the vehicle. Resetting the ECU This is to be completed at your own risk. This procedure will reset the computer so that it may “learn” of your new intake. We are not to be held liable for any mishaps that you may occur while completing this process. • • Disconnect the Negative battery cable for 5 minutes. Reconnect the battery cable and false panel cover.