2002 chevy astro awd


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2005 Chevy Astro Van Wheel Speed Sensor Replacement (RWD) Removal Procedure

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Filed Under (Chevrolet) by admin on 15-09-2010

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1. Raise and support the vehicle. Refer to Vehicle Lifting. 2. Remove the tire and wheel. 3. Remove the brake rotor (2). Refer to Brake Rotor Replacement – Front. 4. Important: The wheel speed sensor mounts to the hub/bearing assembly. Thoroughly clean around this area in order to prevent any dirt or contaminants from entering the sealed wheel bearing. Failure to do this may lead to premature wheel bearing failure. Remove the Wheel Speed Sensor (WSS) mounting bolt. 5. NOTICE: Carefully remove the sensor by pulling it straight out of the bore. DO NOT use a screwdriver, or other device to pry the sensor out of the bore. Prying will cause the sensor body to break off in the bore. Remove the wheel speed sensor (5) from the hub/bearing assembly (4). Remove the WSS cable mounting clip from the knuckle. Remove the WSS cable mounting clip from the upper control arm. Remove the WSS cable mounting clip from the frame attachment point. Remove the WSS cable electrical connector. 6. 7. 8. 9. Installation Procedure 1. Plug the WSS bore to prevent debris from falling into the hub. 2. Using a wire brush or equivalent, clean the WSS mounting surface on the hub to remove any rust or corrosion. 3. Apply a thin layer of wheel bearing lubricant, GM P/N 01051344 to the hub surface and the sensor O-ring prior to the sensor installation.

2002 Chevy C 1500 Engine Controls – Spark Knock/MIL ON/ DTC P0332 Set

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Filed Under (Chevrolet) by admin on 03-09-2010

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Subject: Audible Spark Knock (Detonation), MIL Illuminated, DTC P0332 Set (Replace Rear Bank Knock Sensor and RTV Area Around Sensor) Models: 1998-2002 Chevrolet Camaro, Corvette 1998-2002 Pontiac Firebird with 5.7L Engine (VIN G – RPO LS1) 1999-2002 Chevrolet Silverado, Suburban, Tahoe 2002 Chevrolet Avalance 1999-2002 GMC Sierra, Yukon, Yukon XL 2002 Cadillac Escalade, Escalade EXT with 4.8L, 5.3L or 6.0L Engine (VINs V, T, Z, N, U – RPOS LR4, LM7, L59, L09, L04) This bulletin is being revised to add Cadillac Escalade and Cadillac Escalade EXT to the Models. Please discard Corporate Bulletin Number 02-06-04-023 (Section 6 – Engine/Propulsion System). Condition Some customers may comment on a mild to severe engine ping (commonly referred to as spark knock), usually worse during acceleration and/or an illuminated MIL. Upon investigation, the technician may find DTC P0332 set. Cause This condition may be the result of corrosion of the rear bank knock sensor due to water intrusion into the sensor cavity. This condition is more apparent on vehicles in which customers frequently wash the engine compartment

2003 – 2004 Nissan MURANO AWD TRANSFER CASE NOISE WITH DAMAGED GEARS AND/OR CRACKED CASE

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Filed Under (Nissan) by admin on 31-12-2010

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IF YOU CONFIRM: The AWD Transfer Case needs to be replaced because: • The case is cracked, and/or • Internal gears are damaged. NOTE: Damage, if it occurs, may have been caused by operating the AWD system in the LOCK mode on dry pavement. ACTIONS: 1. Replace the following: • Transfer Case. • AWD Lock Switch with the new one listed in the Parts Information. • AWD Control Unit with the new one Listed in the Parts Information. NOTE: Refer to the ESM for component replacement information. 2. IMPORTANT: Attach pages 3 and 4 of this bulletin to the customer’s copy of the repair order and make sure the customer is handed these pages. • Pages 3 and 4 of this bulletin contain revised Owner Information for “USING ALL WHEEL DRIVE (AWD)”. 3. Inform the customer that the installation of these new parts upgrades the operation of the AWD Lock Switch. The AWD Lock switch will now operate like a 2005 Murano.

2003 Buick Rendezvous All-Wheel Drive (AWD) Disabled Indicator Always On

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Filed Under (Buick) by admin on 30-12-2010

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Conditions for Running the All-Wheel Drive (AWD) Disable Fault • The system voltage is 9-18 volts. • The engine speed is greater than 500 RPM for 5 seconds, and the engine is not in fuel shut-off. • The rear drive module must not be in an overtemperature condition. Conditions for Turning On the All-Wheel Drive (AWD) Disable Lamp The AWD disable lamp illuminates when one of the following conditions exists for 5 seconds: • The PCM commands the solenoid ON and the voltage feedback remains high, B+. • The PCM commands the solenoid OFF and the voltage feedback remains low, 0 volts. This condition is present for 3 key cycles. Action Taken When the All-Wheel Drive (AWD) Lamp Illuminates • The PCM does not illuminate the malfunction indicator lamp (MIL). • The PCM inhibits AWD. • The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Failure Records. • The PCM stores the AWD disable fault in PCM history. Conditions for Clearing the All-Wheel Drive (AWD) Disable Fault • A scan tool can clear the fault. • The PCM clears the fault from PCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring. • The PCM cancels the fault default actions when the fault no longer exists.

2002 Saturn SL2 A/T – 2nd to 3rd Gear Shift Flare

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Filed Under (Saturn) by admin on 01-10-2010

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Automatic Transaxle 2-3 Shift Flare During First Minutes of Driving After Cold Soak (Perform Bulletin Procedure) Models: 2002 Saturn S-Series Vehicles with Automatic Transaxle (RPOs MP6, MP7) Attention: General Manager, Fixed Operations Manager, Parts Manager, Technician Condition: Some customers of 2002 S-series vehicles with MP6 or MP7 automatic transaxles may comment on a 2-3 shift flare during the first few minutes of driving after vehicle cold soak. Cause: This condition may be caused by improper pressure, a leak in the 2nd clutch circuit, improper clutch plate finish on 2nd and 3rd clutches, a restriction in the 3rd clutch oil delivery path in the end cover, or improper surface finish in the piston bores of the 2-3 clutch housing. Correction: To correct this condition, duplicate by cold soaking the vehicle the amount of time at temperature described by the owner. Refer to procedure in this bulletin. Service Procedure Verify proper transaxle pressures by installing gauge and performing stepped pressure test after cold soak. Refer to “Stepped Pressure Test” procedure in the 2002 Saturn S-Series Automatic Transaxle Service Manual. ^ If pressures are low, follow the diagnostic chart for DTC P0745 for possible causes of low pressure. Refer to “P0745 – PC Solenoid Pressure Low” diagnostic in the 2002 Saturn S-Series Automatic Transaxle Service Manual. ^ If pressures are within normal ranges, proceed to Step 2. Remove the transaxle end cover. Refer to “End Cover Replacement” in the 2002 Saturn S-Series Automatic Transaxle Service Manual. Check torque on input shaft nut and end cover 3rd clutch oil passage for restrictions. ^ Input shaft nut torque should be 150 N.m (111 ft-lb). If nut is found to be loose, remove nut, clean threads and install new nut using Service Manual procedures and proceed to check 3rd oil passage. ^ Check 3rd oil passage in the end cover by pouring transaxle fluid through it and another passage. If the passage is restricted, you will notice significantly less fluid flow through it. If 3rd clutch passage is found to be restricted, install new end cover per Service Manual procedures and retest for concern. ^ If nut and 3rd clutch passage are okay, proceed to Step 4. Remove transaxle from vehicle. Refer to “Transaxle Removal” in the 2002 Saturn S-Series Automatic Transaxle Service Manual. Disassemble transaxle and install new 2-3 clutch housing, clutch pistons and clutch plates. Refer to “Transaxle Disassemble” in the 2002 Saturn S-Series Automatic Transaxle Service Manual.