Modules ACDelco that need real-time communication are attached to the high-speed network. Box Troy, MI When more than one module starts to translate simultaneously, the vide information that could assist in the proper ser- message with the highest priority is assigned first access. If a condition is described, it cannot be assumed that the informa- Network diagnostic interface module is needed. Power Mode Master All materials and programs described in this In previous communication systems, modules required ignition input to serve magazine are subject to change.
Submission of materials implies the right to edit and publish. As a way to reduce the amount of wiring, connectors and electrical Inclusion in the publication is not necessarily an load on the ignition switch, a node such as the BCM or DIM is assigned as the endorsement of the individual or the company. All rights reserved. To isolate control module faults, each module must — Off-Awake — Activity on the serial data circuits, modules be disconnected from the network. Each vehicle has main awake, expecting inputs network connectors that can be disconnected so that the — RAP Retained Accessory Power, if equipped — portions of the network can be isolated and checked for faults.
Modules that have functions enabled in RAP are fully Another common type of network is a star link network. Some vehicles Off-Awake use two or more splice packs to tie all the modules together. A special diagnostic tool can be installed in its — Crank — Those modules that have no function critical to place, allowing each control module to be isolated and engine starting are off to provide maximum power for checked for a possible fault.
A DTC set in a module may let you know if there is a problem with a module or a basic power mode circuit fault. Some scan tools have a menu for checking power mode operation: select Diagnostic Circuit Check, then Power Mode.
Networking Power Mode Diagnostic Circuit Check on the scan tool Networking is also known as multiplexing; a method of transferring data among Star link system example distributed electronic control modules via a serial data bus. Knowledge of exactly how each control module The wiring harnesses of an average-size vehicle is one mile connects to the network is necessary to know which tech- long, weighs pounds, has mating connectors and nique to use and when to use it.
The next generation of high-speed vehicle communication may be fiber optics. Fiber optic cable is lightweight, very immune to electromagnetic interference and capable of handling data speeds of 25 megabits per second. The cables are millimeters thick.
The transparent inner core is approximately one millimeter thick and is the master of the bus in a ring configuration. When handling and replacing fiber optic cable, the minimum bend radius is 25 millimeters and the flashing light emitted from a disconnected cable should not be viewed at close range. For more information about the latest communication protocols and networking systems, several ACDelco training courses are available.
Visit www. As on-board chart, the high-level sys- systems progressed, more Electronic Control Units ECUs tem diagnosis is impor- were added to the vehicle, and many were wired to the ALDL tant to make sure that so they could be accessed via the scan tool. Wasted time in the flow chart may In order to make diagnostic information consistent, systems lead to inaccurate diagno- were classified under the following main groups in the Tech sis and lost revenue. Under those groupings, many new ECUs were added, but the struc- One additional change ture has remained in place to this day.
Service procedures and worth noting is the addi- training curriculum have been written around this model, and tion of the Vehicle Control GM Service Information menu any technician familiar with scan tool usage is intimately famil- Systems selection on the iar with its structure and can navigate the scan tool quickly to Tech 2 menu and the SI menu. Although part of the Service access the system being Information for some time, it was introduced in the Tech 2 on diagnosed.
In addition, once models to a design called all modules have respond- Functional Diagnostics. The Diagnostic System Check is ed, the list is reorganized Users of the Tech 2 scan located under the Vehicle Control based on the priority of tool may have noticed System selection. In an effort to bring a unified system diagnostic approach to the technician, the menuing for the Tech 2 is being updated The DTC information displayed includes symptom numbers to reflect the way the GM electronic Service Information SI that identify the type of failure, such as lost communication.
Symptom numbers reduce the number of DTCs for each These diagnostic procedures assist the technician through vehicle. For example, symptom 03 may indicate a short to a logical sequence of steps to check the entire system, as ground and symptom 07 may indicate an open or short to opposed to focusing on individual components.
The real voltage. VIN cards. The information to decipher the GM VIN information ranging from the current VIN codes for all GM vehicles is provided elec- model year back to is available by clicking tronically both in the Service Information and on the desired model year from the displayed on the web at www.
The www. So, an adapter that do the heavy lifting in shifting from two-wheel drive to had to be used. This eliminates the need for installing the a new or remanufactured transfer case. But your first task is to diagnose the vehicle condition. This test is more meaningful because it tests the Rather than just assuming the problem is a damaged transfer actual cap-to-filler neck interface seal, rather than test- case, check the motor, which is easily removed from the ing to see if the cap seals against an adapter surface.
If the prob- The best way to test the fuel cap is to leave it on the lem does lie with the transfer case, the damage is typically vehicle while using an Evaporative Emission System the result of heavy use and maintenance neglect that results Tester EEST , connected at the service port. It is inappropriate to use a tool such as a fuel from the original is the most cost-effective solution.
GM Parts tank cap adapter examples for GM vehicles include also supplies new transfer case assemblies. GE and GEA to test fuel caps on many of today's vehicles. Unlike leak at the remanufactured or reverse-engi- cap. For these neered new motors supplied vehicles, a by the aftermarket, GM actuator leaking cap on motors meet rigorous OE design the test and construction standards.
Use GM transfer cases are designed the adapter to fit more than 85 percent of only when GM model year vehi- called out in cles. They typically incorporate a range of new generation the Service components spanning from snap rings, bearings and seals to Information Fuel tank cap adapter pump tube connectors, chains and synchronizer rings.
The reman transfer cases also yield a simpler replacement Part of the adapter — the filler neck end of the tool solution, with more mandatory replacement parts than — is still needed when testing for a restriction in the aftermarket products. They all come with encoder motors so diagnostic for P on certain vehicles. So, when they roll into your shop The fuel tank cap adapter is also needed when looking for the other half of their four-wheel drive, choose there is a check-valve in the purge line; i.
Congratulations to all of the technicians who have S-EP TSS program. Aubin systems, including on-board diagnostics, air induction systems, exhaust and emission systems, electronic engine controls, ignition systems and fuel delivery systems. A: To check your exclusively yours points balance online: — Go to www.
You must have your exclusively yours card available when calling. Call , prompt 2, to speak with a technical expert with the latest OEM information. Remote Keyless Entry When this problem occurs, all of Inoperative these symptoms are present, but the customer may not notice all of them. An update of the PCM is central locking may be intermittently required. Tabs, B. Hinge slots present, it supplies fuse 5 in panel 22a. This is When viewed from the top, there a normal operation that was added to may not be a visual indication that the This condition is often caused by the system during the model box is not properly sealed.
The The blower motor fan speed drops to sealed air cleaner assembly and dirty center portion of the cylinder should its lowest setting 1 as soon as the air entering the engine, verify that the pop up when the key is removed.
This before reinstalling the cover bolts. To repair this condition, carefully feature keeps air from the center vent remove the immobilizer antenna To check that the cover is properly from blowing onto the microphone in seated once the cover bolts have been if equipped from around the ignition the ceiling and reducing the voice switch to check for evidence of spilled torqued down, gently pull up on the recognition capability.
This gives a liquids. If residue is found, remove the ignition lock cylinder and inspect the Owners of TSX models built before positive indication that the tabs of the cylinder and switch for binding. It may the VIN cutoff will receive this feature if cover are seated in the hinge slots. Lube Diagnostic Assistance the lock cylinder with light machine oil Air Cleaner Cover For free technical diagnostic before re-installing.
If the cylinder still Installation assistance and product information binds, it should be replaced. If residue regarding specific ACDelco products, is found in the switch, it must be Cadillac SRX, contact these toll-free information replaced. The antenna for the RKE is If replacing only the air filter element, Brakes — prompt 1 mounted in the center console by the the air cleaner outlet side cover does rear ashtray.
Hover Over an Option. To get a detailed description of each category and it's available options, to help you make the correct selection. Retain Steering Wheel Controls. Easy to install with an aftermarket radio, easy to program with our auto detect feature. Replace Factory Radio.
Remove that featureless factory radio and install an aftermarket radio with Axxess's radio replacement interfaces and harnesses. Add Remote Start.
Cut down in installation time with Axxess's remote start vehicle specific harnesses. Add Cameras to Factory Radio. Stay aware of your surroundings and improve safety by adding cameras to your existing factory screen. Add Amp to Factory Radio. Get the sound quality you're looking for by adding aftermarket amplifiers to your factory radio with Axxess's Add-n-amp option.
0コメント