Operation CHARM: Car repair manuals for everyone.

With ABS 5.4


Part 1 Of 2:





Part 2 Of 2:






Scope
The following pages include the values and readings for measuring the signals and levels in the ABS control module.

Points To Remember
- Observe the test conditions. Use common sense in assessing the readings.
- Start by checking that the control module is receiving power and is grounded.
- Check all sensor inputs and signals from other systems.
- Finally, check the control module outputs. Remember that the readings do not provide an indication that the actuator is operating.
- If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components that need further checking.
- The specified readings are valid for a correctly calibrated Fluke 88/97.
- The readings %(+) and ms(+) indicate the pulse ratio and pulse length. A test instrument capable of measuring both pulse rate and pulse length must be used. The + sign denotes a positive trigger pulse (TRIG+).

Test readings

IMPORTANT: Unless otherwise stated, the test readings are those that should be obtained on the control module connector (unplugged).





Connector Pin Locations

Legend Of Symbols
> Greater Than
< Less Than
~ Alternating Current
LP Logic Probe
P Select Pulse
p Visible Pulse

Part 1 Of 2:





Test Readings (Part 1 Of 2)

Part 2 Of 2:





Test Readings (Part 2 Of 2)