Diagram System

Wiring diagrams are divided into systems. The layout of the system diagram contains all components of the system (ie: control modules, sensors, voltage supply, fuse connection, etc.).

The system diagrams can be found at their logical location within the Alldata system, or at the diagrams contained within Alldata's "Overall Vehicle Information, Shortcuts to Popular Information" section.

For easier comprehension, some system diagrams may be depicted in multiple articles (Part 1, Part 2, etc.). In addition, the subsequent diagrams may show wire leads which direct you, by means of an arrow, to a different "part" within that system.

For example:

X4/25 (2)
II

The X4/25 (2) indicates that the wire continues to component/connector X4/25, pin 2 and the Roman Numeral II indicates that this component and it's wiring may be found in Part 2 of the diagram for the same component/system. (III would direct you to part 3 and so forth.)

An arrow may also direct you to diagram in another system. For example, if you are looking at a "Computers and Control Systems" diagram and you see an arrow with the letters "CAN", this is intended to direct you to the wiring diagram for the CAN (Controller Area Network) network. Alldata has made every attempt to hyperlink you to the diagram in such cases, but if you find that there is no hyperlink and you are not sure what the reference (i.e., CAN) means, refer to the list of acronyms. Acronyms Used The acronym list may help you determine where to look for the diagram.

Variations in wiring or componentry which are model specific, or due to engine variations or equipment levels are enclosed by a dashed box.

Phase-in changes in variations are denoted with (1) and (2).

Components/wiring for California vehicles are indicated by the callout U2 in the upper left hand corner of a dashed box. The callout U2 is then referenced in the legend (component index) as valid for USA California.

Connector sleeves (Z) are replaced by a twin-connection when applicable.
Z1 and Z2 are parallel Z splices with the same voltage potential.
Actual cross section of wire may differ from values shown in wiring diagram.
Changes in cross section of wire will be shown framed.
The information for option variations (i.e. ->95 and 96->) denotes: end of MY 1995 and beginning of MY 1996 (respectively).

Vehicles Identification Numbers (VIN) are valid for vehicles built during main production run.
Vehicles built during production phase-in or production start-up may have lower Vehicle Identification Numbers.

Coordination of acronym to function is listed in "Acronyms".

Components which include a slash mark in their description, (ie: N47-1 ASR/SPS control module) indicates that the component is applicable to either both systems or just one of the systems.

Example: N47-1 ASR/SPS control module

Model 129 is not equipped with SPS, therefore on a model 129 vehicle, the control module is applicable only for ASR.

Model 140 is equipped with SPS, therefore on a model 140 vehicle, the control module is applicable for both ASR and SPS.

Finding the Location of a Connector, Component, Splice or Ground
Abbreviations used within diagrams:
X = Connector (example, connector X18)
Z = Connector sleeve (Splice)(example, connector sleeve Z49)
W = Ground (example, ground W11)

If locations of components, connectors, splices and grounds cannot be found at the system level or component level, they may be found at locations at the vehicle level. Locations