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2002 trailblazer encoder motor sensor

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4WD Switch Indicator Lights Flashing, 4WD Inoperative, DTCs C0327, P0500, P0836, P1875 Set (Replace Encoder Motor Sensor, Reprogram TCCM, Inspect Front Drive Axle Engagement Sleeve for Damage/Repair if Necessary)

Correction Important: For ease of reassembly, shift the transfer case assembly to 2HI for the NV263 (NP1), or Neutral for the NV246 (NP8) prior to removing any components. For information on placing the NV246 (NP8) transfer case in NEUTRAL, see the procedure at the end of this bulletin. 1. Remove the transfer case and front axle/engine skid plates (if equipped). 2. Disconnect and position the front propeller shaft aside. 3. Disconnect the transfer case encoder motor wiring harness. 4. Remove the three (3) bolts that retain the encoder motor to the transfer case. 5. Separate the encoder motor assembly from the transfer case and place it on a work bench. Important: DO NOT REMOVE THE SCREWS INDICATED WITH THE (1) IN THE ABOVE ILLUSTRATION. 6. Remove the four screws on the outer perimeter of the encoder motor housing. Important: For proper timing and ease of reassembly, hold the gear in place as your remove the cover from the encoder motor assembly with your thumb or finger. 7. Carefully remove the cover from the encoder motor assembly. The cover has a seal on the bottom side. Place the cover in a position to protect this seal from damage and/or contamination. Important: Observe the location of the punch mark on the large gear in relation to the timing mark on the housing if the transfer case was placed in the 2HI for the NV263 (NP1), or Neutral for the NV246 (NP8). The timing marks should be within one tooth of proper alignment. If not, you must note the timing mark positions for reassembly. 8. Locate the two shims; one on the small gear and another on the larger gear. Set them aside on a clean surface for reuse. Important: After removing the large gear from the housing, a dark gray phenolic spacer should remain in the casting where the bottom of the large gear resides. Locate this spacer and save for reuse. 9. Carefully lift the large gear from the housing. The sensor and wiring harness will come with the gear. 10. Disconnect the wiring from the sensor. 11. Separate the sensor from the large gear.

2000-2002 Infiniti G20 MIL “ON” REAR O2 SENSOR DTC P0138/P0139/P0140 Repair Manual

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. 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. Figure 1 SELF-DIAG RESULTS SYSTEM ENGINE DATE 03/15/2002 3:35:35 P/N 23710-7J400 DTC Code TP020169 DTC RESULTS TIME HO2S2 (B1) 3 [P0138] Current ECM Part Number 2/3 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 2000 M/T 23710-7J400, -7J401, -7J402, -7J460 2000 A/T 23710-7J410, -7J411, -7J412, 7J470 2001-2002 M/T 23710-6J105, -6J106, -6J107, -6J108, 6J170 2001-2002 A/T 23710-6J115, -6J116, -6J117, -6J118, -6J180 A. If the ECM P/N in the vehicle matches one of those listed under “Current ECM P/N” in Chart A (above): • Look in the “Vehicle” Column in Chart A (above) and determine the vehicle “configuration” (i.e. 2002 M/T). Make a note of the vehicle configuration and perform ECM Reprogramming , below. 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. 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:

Kia 2002 Saturn SL will set if TP sensor voltage is less than 0.2 volts

The throttle position (TP) sensor is a potentiometer that varies resistance according to changes in throttle plate position. The powertrain control module (PCM) measures the signal voltage from the TP sensor which is a reduced value of the PCM 5-volt reference. The voltage ranges from 0.4 (+/-0.2) volts at 0% throttle position to 4.7 volts at wide open throttle. DTC P0122 sets when the TP sensor signal voltage at the PCM is below the calibrated voltage value. DTC Parameters DTC P0122 will set if TP sensor voltage is less than 0.2 volts when: z The condition exists for longer than 10 seconds. z The ignition is ON. DTC P0122 diagnostic runs continuously with ignition ON. DTC P0122 is a type A DTC. Diagnostic Aids Important If DTC P1635 is set, diagnose that DTC first. 2002 Saturn SL
To locate an intermittent problem, use a scan tool to monitor TP SENSOR voltage with ignition ON, engine OFF. Wiggling the wires while watching for a change in TP SENSOR voltage may locate the area where an open or short to ground in the wiring could lie. An intermittent open in the TP SENSOR can cause this DTC to set. Use the scan tool to monitor TP SENSOR as the accelerator pedal is slowly depressed. The voltage should change smoothly from 0.4 volts at 0% throttle, to 4.7 volts at wide open throttle (+/-0.2 volts).


1999-2002 CHEVROLET SILVERADO 2000-2002 CHEVROLET TAHOE, SUBURBAN 2002 CHEVROLET AVALANCHE 1999-2002 GMC SIERRA 2000-2002 GMC YUKON, YUKON XL LOCATED IN THE SEVERE CORROSION AREAS LISTED BELOW Service Procedure The following procedure provides instructions for repairing a corrosion condition where the front wheel speed sensor mounts on the front wheel bearing assembly. 1. Raise the vehicle on a suitable hoist and support as necessary. 2. Remove both front tires and wheels. 3. Compress the front brake caliper pistons. 3.1. Install a large C-clamp over the top of the caliper housing and against the back of the outboard pad. 3.2. Slowly tighten the C-clamp until the pistons are pushed completely into the caliper bores. 3.3. Remove the C-clamp from the caliper. Important: It is not necessary to remove the front brake caliper from the bracket when removing the bracket in the next step. 4. Remove the two bolts that attach the front brake caliper mounting brackets to the knuckle. Notice: Support the brake caliper with heavy mechanic’s wire, or equivalent, whenever it is separated from its mount, and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak. 5. Remove the brake caliper and bracket as an assembly and support it with heavy mechanic’s wire or equivalent. DO NOT disconnect the hydraulic brake flexible hose from the caliper. 6. Mark the relationship of the rotor to the bearing hub. 7. If equipped, remove the rotor retaining push nuts from the wheel studs

2002 Toyota Truck Tundra Access Cab SR5 2WD Timing Belt Service and Repair Manual

2002 Toyota Truck Tundra Access Cab SR5 2WD V6-3.4L (5VZ-FE) Copyright © 2008, ALLDATA 9.50 Page 2 REMOVAL 1. REMOVE ENGINE UNDER COVER 2. DRAIN ENGINE COOLANT 3. DISCONNECT UPPER RADIATOR HOSE 4. DISCONNECT PS PUMP FROM ENGINE a. Disconnect the 2 PS air hoses from the air intake chamber and resonator. b. Remove the bolt holding the PS pressure tube clamp to the frame. c. Remove the drive belt. d. Remove the bolt and nut, and disconnect the PS pump from the engine. 5. w/ A/C: DISCONNECT A/C COMPRESSOR FROM ENGINE a. Disconnect the A/C compressor connector. b. Remove the drive belt. c. Remove the 4 bolts, and disconnect the A/C compressor from the engine. 6. LOOSEN FAN WITH FLUID COUPLING AND FAN PULLEYS 7. REMOVE DRIVE BELT FOR GENERATOR 8. REMOVE NO.2 FAN SHROUD 9. REMOVE FAN WITH FLUID COUPLING AND FAN PULLEYS 10. w/ A/C: REMOVE A/C COMPRESSOR BRACKET Remove the 5 bolts and A/C compressor bracket. 11. DISCONNECT UPPER RADIATOR HOSE 12. REMOVE NO.2 TIMING BELT COVER a. Disconnect the camshaft position sensor connector from the No. 2 timing belt cover. b. Disconnect the 4 high-tension cord clamps from the No. 2 timing belt cover. c. Remove the 6 bolts and timing belt cover. 13. REMOVE FAN BRACKET a. Remove the nut and PS pump adjusting strut. b. Remove the bolt, nut and fan bracket. 14. SET NO. 1 CYLINDER AT TDC/COMPRESSION a. Turn the crankshaft pulley and align its groove with timing mark “0″ of the No. 1 timing belt cover. b. Check that the timing marks of the camshaft timing pulleys and No. 3 timing belt cover are aligned. If not, turn the crankshaft pulley 1 revolution (360°) . HINT: When re-using timing belt: Place the matchmarks on the timing belt and camshaft timing pulleys, and place matchmark on timing belt to match the end of the No. 1 timing belt cover. 15. REMOVE TIMING BELT TENSIONER Alternately loosen the 2 bolts, and remove them, the belt tensioner and dust boot. 16. REMOVE TIMING BELT