Reference Symbols

NOTE: In the examples shown on this page, an 'X' is used where a number would appear on an actual Figure.


Reference Symbols
Reference symbols are used for three purposes:
- To allow the user to complete the individual system circuit to power supply or ground
- To refer the user to a related circuit
- To identify control module inputs, outputs and signal grounds

Battery Power Supply:

This symbol represents a direct battery power supply and refers the user to Figure 01.1, 01.2 or 01.3.

Ignition Switched Power Supply:

This symbol represents ignition switched power supply and refers the user to Figure 01.1, 01.4 or 01.5.
The suffix I indicates auxiliary power. Power is supplied in ignition switch key positions I (AUXILIARY) and II (IGNITION).
The suffix II indicates ignition power. Power is supplied in ignition switch key positions II (IGNITION) and III (ENGINE CRANK).
The suffix E indicates engine management switched power. Power is supplied in ignition switch key positions II (IGNITION) and III (ENGINE CRANK) under ECM control.

Ignition Switched Ground:

This symbol represents an ignition switched ground and refers the user to Figure 02.1.
This symbol without a suffix indicates CRANK. Ground is completed in ignition switch key position III (ENGINE CRANK).
The suffix I indicates auxiliary ground. Ground is completed in ignition switch key positions I (AUXILIARY) and II (IGNITION).
The suffix II indicates ignition ground. Ground is completed in ignition switch key positions II (IGNITION) and III (ENGINE CRANK).

Figure Number Reference Flag:

This symbol refers the reader to a figure number only. It does not refer to a flag with the same number on a different figure.

As used in Figures 01.1 through 02.1, the reference flag refers the user to a continuation of the circuit. In this instance, the user matches the number to a Power Supply or Ground symbol to trace the circuit.

In most other cases, it is not necessary to refer to another figure for completion of a circuit, as the reference flags are used to indicate parallel circuits and circuits that share components. Most of the circuits where this situation occurs are overlapped to avoid the necessity for cross-referencing to another figure. Exceptions to this rule are instances where signals are transmitted to or received from other system circuits. When circuits are not overlapped, they are noted by (CIRCUIT CONTINUED).

BPM Because the Body Processor Module appears numerous times, the abbreviation BPM is used in the reference tags on Figures 01.2 and 02.1 in order to conserve space.

Control Module I/O, Data Link, Signal And Networks:

These six symbols are employed to assist the user in visualizing the 'logic' of circuits containing control modules. The symbols identify control module input, output, data link, signal ground and network pins. These symbols are also employed on the corresponding data page.