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location of low coolant sensor on 1999 buick century limited

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Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination)

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2000-2002 Buick Century, Regal 2000-2001 Chevrolet Lumina 2000-2002 Chevrolet Impala, Monte Carlo 2000-2002 Pontiac Grand Prix 2000-2002 Oldsmobile Intrigue 1. Verify that the coolant is at proper level in the radiator and the coolant recovery bottle. If the coolant is low, add proper amount of 50/50 water and DEX-COOL® mixture. If the low coolant light operates properly, diagnose the cooling system for loss of coolant as outlined in SI. DO NOT proceed further with this bulletin. 2. Remove the low coolant level sensor. Refer to Coolant Level Module Replacement in the Engine Cooling sub-section. 3. With the key on, the engine off and the coolant level sensor disconnected from the vehicle wiring harness, observe the low coolant light: Subject: Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination) Models: 2000-2002 Buick Century, Regal 2000-2001 Chevrolet Lumina 2000-2002 Chevrolet Impala, Monte Carlo 2000-2002 Pontiac Grand Prix 2000-2002 Oldsmobile Intrigue • Light is on — Chassis wiring or instrument cluster concern. Follow the appropriate diagnostic information in SI. • 4. With the key off, connect the coolant level sensor into the vehicle’s wiring harness. Connect a ground wire (1) to the battery negative terminal. Using a sharp probe (3) attached to the ground wire, ground the coolant sensor probe (2) as shown in the illustration. Make sure a good contact is made. With the key on and the engine off, observe the low coolant light for at least 15 seconds. 5. Using a small wire brush or emery cloth, polish the low coolant level sensor probe to remove any film or oxidation. The probe should be a bright brass color when finished. Use Brake Parts Cleaner to flush removed deposits from the low coolant sensor probe. Reinstall the low coolant sensor into the vehicle and proceed to Step 6. 6. Flush the cooling system and install new DEX-COOL® mixture as outlined in the SI. Check the vehicle’s warranty history to determine if any engine gasket had recently been changed. If there has not been a recent gasket replacement, locate and repair the source of the engine oil contamination

1999 Buick Regal DTC B1001 Option Configuration Error Repair Manual

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Test Description The number(s) below refer to the step number(s) on the diagnostic table. 2. This step checks to see if the correct VIN is programmed in the powertrain control module (PCM). 4. This step checks to see if the body control module (BCM) has been replaced. 5. This step explains the proper steps to perform after a BCM has been replaced in order for the <- Back Forward -> Document ID# 385021 1999 Buick Regal Print BCM to operate properly. 6. This step checks to see if the correct VIN is programmed in the BCM. 7. This step explains how to properly program the VIN into the BCM. DTC B1001 Option Configuration Error Step Action Value (s) Yes No 1 Was the SIR Diagnostic System Check performed? — Go to Step 2 Go to SIR Diagnostic System Check 2 1. Install the scan tool. 2. Use the scan tool to verify that the PCM is programmed with the correct VIN by comparing the VIN that is stored in the PCM to the VIN plate of the vehicle. Is the PCM programmed with the correct VIN? — Go to Step 4 Go to Step 3 3 Use the scan tool and/or the techline machine to program the correct VIN into the PCM. Is the programming procedure complete? — Go to Step 9 — 4 Was the BCM replaced? — Go to Step 5 Go to Step 6 5 1. Use the F2 function key and follow the instructions on the scan tool under the BCM SPECIAL FUNCTIONS to reprogram the BCM. This allows the BCM to learn the Restraints ID from the SDM and also to learn other important data that is required. 2. Use the F6 function key and follow the instructions on the scan tool under the BCM SPECIAL FUNCTIONS to program the correct VIN into the BCM. 3. Use the techline machine to perform the theft relearn procedures for the replacement BCM. Are the programming procedures complete? — Go to Step 9 — 6 Use the scan tool to verify that the BCM is programmed with the correct VIN by comparing the VIN that is stored in the BCM to the VIN that is stored in the PCM. Is the BCM programmed with the correct VIN? — Go to Step 8 Go to Step 7 7 Use the F6 function key and follow the instructions on the scan tool under the BCM SPECIAL FUNCTIONS to program the correct VIN into the BCM. Is the reprogramming procedure complete? — Go to Step 9 — 1. Turn the ignition switch to the OFF position. 2. Replace the SDM. Refer to Inflatable Restraint

1995-1999 Buick Riviera Steering Vibration/Shudder/Moan During Parking Maneuvers on Dry Pavement (Install Power Steering Pressure (Inlet) and/or Return (Outlet) Hose Assembly)

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1. Verify that the power steering pump reservoir is full. 2. Verify that the accessory drive belt is in good condition and that the pulleys are not bent or damaged. 3. Verify proper belt tension and operation of the belt tensioner. 4. Check for power steering hose ground out conditions. 5. Check for good engine idle and correct engine RPM. 6. Check to see that the rear transaxle mount does not have a plastic assembly aid installed which is used Subject: Steering Vibration/Shudder/Moan During Parking Maneuvers on Dry Pavement (Install Power Steering Pressure (Inlet) and/or Return (Outlet) Hose Assembly) Models: 1995-99 Buick Riviera 1997-2001 Buick Park Avenue, Ultra 2000-2001 Buick LeSabre 2000-2001 Pontiac Bonneville • 1995-98 Buick Riviera • 1997-98 Buick Park Avenue and Ultra • 1999 Buick Riviera • 1999-2001 Buick Park Avenue and Ultra • 2000-2001 Buick LeSabre • 2000-2001 Pontiac Bonneville • 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. for assembly purposes. If the assembly aid is installed, remove the assembly aid and install the rear transaxle mount. 7. With the vehicle on dry pavement, maneuver the vehicle in parking positions. If the steering vibrates/shudders or moans in this test, replace the power steering pressure hose and/or the harmonic balancer. Important: A defective harmonic balancer on the 1995 Buick Riviera can influence steering vibrations after power steering hose installation. Important: When installing the pressure hose on the 1995 Buick Riviera, pull down on the pressure hose at the rear of the engine or bend the hose to allow clearance between the hose and the front of the dash. Power Steering Pressure (Inlet) Hose Replacement Procedure For 1995-1998 Vehicles: 1. Raise and suitably support the vehicle. Refer to Vehicle Lifting and Jacking in the General Information section of the Service Manual. 2. Drain the power steering fluid. Refer to Draining the Power Steering System in the Power Steering section of the Service Manual. 3. Remove the power steering gear assembly heat shield (1). 4. Disconnect the power steering pressure hose from the power steering pump assembly (4). 5. Remove the bolt/screws from the retaining clips (3). 6. Disconnect the power steering pressure hose from the power steering gear assembly (2). 7. Remove the power steering pressure hose assembly from the vehicle. 8. Install the power steering pressure hose assembly to the vehicle. 9. Connect the power steering pressure hose to the power steering pump assembly (4). 10. Connect the power steering pressure hose to the power steering gear assembly (2). Tighten Tighten the power steering pressure hose to the steering gear to 27 N·m (20 lb ft). 11. Install the bolt/screws to the retaining clips (3). Tighten Tighten the retaining clip bolt/screws to 6 N·m (53 lb in). 12. Install the power steering gear assembly heat shield (1). 13. Lower the vehicle. 14. Fill and bleed the power steering system using, J 43485. Refer to Corporate Bulletin Number 83-32-09, dated November, 1998. Power Steering Pressure (Inlet) and Return (Outlet) Hose Replacement Procedure For 1999-2001 Vehicles: 1. Raise and suitably support the vehicle. Refer to Vehicle Lifting and Jacking in the General Information section of the Service Manual. 2. Drain the power steering fluid. Refer to Draining the Power Steering System in the Power Steering section of the Service Manual. 3. Remove the LH front wheel/tire assembly. 4. Remove the LH lower splash shield. 5. Remove the lower radiator air deflector (engine splash shield, if installed.

1999-2001 Infiniti Q45 MIL “ON” REAR O2 SENSOR DTC SERVICE PROCEDURE

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SERVICE PROCEDURE You will be performing the following, as required: • Determine the DTC Stored in ECM from the CONSULT-II Self-diagnosis results. • ECM Part Number Check to determine if this bulletin applies. • ECM Reprogramming (required if the ECM P/N in the vehicle matches one of those listed under “Current ECM P/N” in Chart A -page 2). • Replacing the Rear Oxygen Sensor (required if ECM Reprogramming is needed). Determine the DTC Stored in ECM: 1. Determine which DTC code is stored in the vehicle’s ECM by performing CONSULT-II Self-Diagnosis. 2/4 2. Print out the Self-Diagnosis results for use in ECM Part Number Check , below. See Figure 1 for an example of the CONSULT-II Self-Diagnosis printout. ECM Part Number Check 1. Compare the vehicle’s current ECM P/N (from your CONSULT-II Self Diagnosis printout) to those shown under Current ECM P/N in Chart A , below: Chart A – Current ECM P/N’s: Vehicle Current ECM P/N 1999-2001 Q45 23710-3H000, -3H001, -3H005, -3H006, -3H007 A. If the ECM P/N in the vehicle matches one of those listed under “Current ECM P/N” in Chart A (above): • Perform ECM Reprogramming on page 3. B. If the ECM P/N in the vehicle does not match one of those listed under “Current ECM P/N” in Chart A (above): • This bulletin does not apply. Use the appropriate Electronic Service Manual (ESM) to further diagnose and repair the incident. SELF-DIAG RESULTS SYSTEM ENGINE DATE 01/24/2002 5:35:07 P/N 23710-3H000 DTC Code TP020024 DTC RESULTS TIME HO2S2 (B1) 3 [P0138] Current ECM Part Number 3/4 ECM Reprogramming 1. Perform ECM Reprogramming to install the latest available ECM data. • If you are unfamiliar with ECM Reprogramming, click here to link to the “ECM Reprogramming For Infiniti Vehicles” general procedure or refer to Attachment A in the print copy of this bulletin. • For those familiar with ECM Reprogramming, perform the following:

1999 Jeep Grand Cherokee Limited AUTOMATIC TRANSMISSIONS Chrysler 45RFE Electronic Controls Repair Manual

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INTERNAL TCM Circuit Description The TCM is reporting internal errors. Diagnostic Procedure 1. Turn ignition switch to LOCK position. Remove transmission control relay. Measure resistance between ground and relay ground circuit (Black/Yellow wire) in relay connector. If resistance is greater than 5 ohms, repair open circuit. If resistance s not greater than 5 ohms, go to next step. 2. The TCM has an internal problem and must be replaced. P0715: INPUT SPEED SENSOR ERROR Circuit Description DTC P0715 will set if an excessive change in input RPM has been detected in any gear. Possible Causes * Intermittent wiring and connector problems. * Faulty input speed sensor. * Input speed sensor circuits shorted to ground, shorted to voltage, or open. * Faulty TCM. Diagnostic Procedure 1. Place gear selector in “P” position and start engine. Using scan tool, monitor input speed sensor value. If value is less than 400 RPM, go to next step. If value is not less than 400 RPM, go to step 9. 2. Turn ignition switch to LOCK position. Install Transmission Simulator (8333). Turn ignition on. Using transmission simulator, turn rotary knob to middle (1000/3000) position. Turn INPUT/OUTPUT switch on. Using scan tool, monitor input and output speed sensor values. If input speed sensor value is 2950- 3050 RPM and output speed sensor value is 950-1050 RPM, replace input speed sensor. If speed sensor values are not as specified, go to next step. 3. Turn ignition switch to LOCK position. Disconnect TCM harness connector. Remove transmission control relay. Using fused jumper wire, jumper fused B+ circuit (Red/White wire) and transmission relay output circuit (Red wire) together at relay connector. Turn ignition on. Measure voltage between ground and input speed sensor signal circuit (Red/Black wire) at TCM harness connector. If voltage is greater than 3 volts, repair circuit for short to voltage. If voltage is not greater than 3 volts, remove jumper wire, install relay and go to next step. 4. Turn ignition switch to LOCK position. Disconnect input speed sensor harness connector. Measure resistance of input speed sensor signal circuit (Red/Black wire) between TCM and input speed sensor. If resistance is greater than 5 ohms, repair open circuit. If resistance is not greater than 5 ohms, go to next step. 5. Measure resistance of input speed sensor ground circuit (Dark Blue/Black wire) between TCM and input