vw lt46 electronic immobiliser
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Filed Under (Ford) by admin on 07-05-2011
Principles of Operation Differential Electronic Module (DEM) and Active On-Demand Coupling The main role of the active on-demand coupling and the differential electronic module (DEM) is to regulate the all wheel drive (AWD) function by distributing torque between the front and rear axles. The system consists of a coupling that combines mechanical, hydraulic and electronic sections. The coupling unit is attached to the rear axle, between the differential gear and the driveshaft. The mechanical and hydraulic sections are driven by the driveshaft. Active on-demand coupling (AOC) has the following characteristics: Permanent AWD with electronic control of torque transfer front to rear 4X4 control module integrated into the DEM Similar to four wheel drive (4WD) operation No driveline wind-up during slow speed maneuvers or parking The system is not sensitive to size differences between the 4 road tires (when driving with a spare wheel, for example). The system is not sensitive to being towed with one axle raised. Inspection and Verification — Electronic Shift 1. Visually inspect for the following obvious signs of mechanical and electrical damage. Visual Inspection Chart Mechanical Axle shafts and universal joints Driveshaft and universal joints Rear differential Differential electronic module (DEM) Fluid leaks Matching tire size 2. If the concern remains after the inspection, connect the scan tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan tool menu. If the scan tool does not communicate with the vehicle: check that the program card is correctly installed. check the connections to the vehicle. check the ignition switch position. 3. If the scan tool still does not communicate with the vehicle, refer to the scan tool manual. 4. Carry out the DATA LINK DIAGNOSTICS test. If the scan tool responds with: CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418-00. NO RESP/NOT EQUIP for DEM, GO to Pinpoint Test A. SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out the anti-lock brake system (ABS) module self-test. Carry out one key cycle after clearing codes. 5. If the DTCs retrieved are related to the concern, go to the 4X4 Control Module (DEM) Diagnostic Trouble Code (DTC) Index to continue diagnostics. 6. NOTE: Not all DTCs cause the traction control indicator to illuminate. Refer to the table for specific DTCs. When the 4X4 control module (DEM) detects certain types of faults in the AWD system, a DTC is set and the traction control indicator will stay illuminated until the condition has been repaired and the DTCs are cleared using the scan tool. Carry out one key cycle after clearing codes. DTC P0562 System Voltage Low P0563 System Voltage High P0602 Powertrain Control Module (PCM) Programming Error P0606 ECM/PCM Processor Electrical Smart junction box (SJB) mini-fuse 19 (10A) Differential electronic module (DEM) Wiring harness Connector(s) Circuitry Description Traction Control Indicator State OFF OFF ON ON
Filed Under (Mercedes-Benz) by admin on 08-08-2010
The hydraulic pressure from the dual master cylinder is split diagonally between the right front/left rear and left front/right rear wheel brake circuits, providing a balanced braking response should a malfunction occur in a brake line. The proportioning valve function is produced by the Electronic Brake Proportioning System (EBP). EBP dynamically adjusts the application of hydraulic pressure to the rear brakes. Both front and rear brakes are disc type with single piston floating calipers. The front discs are internally ventilated while the rear discs are solid. To ensure better ventilation of the brakes, additional openings for cooling air have been integrated into the bumper. The parking brakes are drum type with the drum located in the hub area of the rear disc. The self adjusting brake mechanism is like the W140 and is located under the passenger compartment second seat row. Component Location 4-ETS/ABS Hydraulic Unit
Filed Under (Lincoln) by admin on 15-02-2011
1. Disconnect battery ground cable (14301). Refer to Section 14-01. 2. Remove instrument panel (04320). Refer to Section 01-12. 3.
Remove four A/C electronic blend door actuator retaining screws. 4. Remove A/C electronic blend door actuator. A/C Electronic Blend Door Actuator Installation 1. Insert A/C electronic blend door actuator into A/C air temperature control door (19D842) (manually moving A/C air temperature control door will help engage shaft). 2. Attach A/C electronic blend door actuator with four retaining screws. 3. Install instrument panel. Refer to Section 01-12. 4. Connect battery ground cable. Refer to Section 14-01.
Filed Under (Ford) by admin on 12-02-2011
1. Disconnect battery ground cable (14301) . For additional information, refer to Section 14-01. 2. Disengage console panel from instrument panel reinforcement (04545) and remove from instrument panel (04320) . 3. Disengage console panel from RH side of center console finish panel, if equipped. Console Panel Installation 4. Remove climate control assembly-integrated control panel. For vehicles with manual A/ C, refer to the procedure in this section. For vehicles with EATC, refer to Section 12-03B. 5. For vehicles with EATC, open glove compartment (06010), press sides inward and lower glove compartment toward floor. 6. For vehicles with EATC, remove retaining screws and position remote climate control module (18C612) aside. 7. Working from under the passenger side of the instrument panel , remove A/C electronic blend door actuator electrical connector from A/C electronic blend door actuator. 8. Remove four screws retaining A/C electronic blend door actuator to the A/C evaporator housing and remove A/C electronic blend door actuator from A/C air temperature control door.
Filed Under (Jaguar) by admin on 03-06-2010
CONDITION SUMMARY: ELECTRONIC PARKING BRAKE (EPB) ACTUATOR DIAGNOSTICS Situation: This bulletin has been developed to act as a diagnostic aid in the course of diagnosis and repair the following customer concerns of the Electronic Parking Brake (EPB) actuator: • Electronic parking brake fails to apply effectively (the parking brake may not apply at all; or the parking brake performance may be below the required standard). • Electronic parking brake fails to release properly (brake drag). • Red brake warning lamp illuminated (constant or flashing). • Message center displays ‘Parking Brake Fault’ or ‘Cannot Apply Parking Brake’ Diagnostic Trouble Codes (DTC) C1801-00 (C1801), C1802-00 (C1802), or C1803-00 (C1803 may also be logged. Action: If a customer should express the above concern and one or more of the DTC’s are stored, follow the Diagnostic Procedure outlined below in this bulletin.