Hummer H2. Manual — part 79
ELECTRONIC CONTROLLERS
Electronic Controllers
Connector (Weatherpack type) leaking
A
Require repair or replacement.
Connector melted
A
Require repair or replacement. See note
below.
NOTE: Determine cause and correct prior to repair or replacement of part.
Connector missing
C
Require replacement.
Contaminated
A
Require replacement.
NOTE: Determine source of contamination. Require repair or replacement.
Inoperative
A
Require repair or replacement. See note
below.
NOTE: Inoperative includes intermittent operation or out of OEM specifications.
Leaking externally
A
Require repair or replacement.
Leaking internally
A
Require repair or replacement.
Noisy
2
Suggest repair or replacement.
Terminal broken
A
Require repair or replacement.
Terminal burned, affecting performance
A
Require repair or replacement. See note
below.
NOTE: Determine cause and correct prior to repair or replacement of part.
Terminal burned, not affecting
performance
2
Suggest repair or replacement.
Terminal corroded, affecting
performance
A
Require repair or replacement.
Terminal corroded, not affecting
performance
2
Suggest repair or replacement.
Terminal loose, affecting performance
B
Require repair or replacement.
Terminal loose, not affecting
performance
1
Suggest repair or replacement.
Threads damaged
A
Require repair or replacement.
Threads stripped (threads missing)
A
Require replacement.
Wire lead conductors exposed
B
Require repair or replacement.
Wire lead corroded
A
Require repair or replacement.
Wire lead open
A
Require repair or replacement.
Wire lead shorted
A
Require repair or replacement.
Condition
Code
Procedure
Application incorrect
B
Require replacement.
Attaching hardware missing
C
Require replacement of hardware.
Attaching hardware threads
A
Require repair or replacement of hardware.
1998 Chevrolet Pickup C1500
Uniform Inspection and Communication Standards BRAKE SYSTEMS
FLUID
damaged
Attaching hardware threads
stripped (threads missing)
A
Require repair or replacement of hardware.
Code set (if applicable)
A
Further inspection required. See note below.
NOTE: Refer to manufacturer's diagnostic trouble code procedure and require repair or
replacement of affected component(s).
Connector broken
A
Require repair or replacement.
Connector melted
A
Require repair or replacement. See note
below.
NOTE: Determine cause and correct prior to repair or replacement of part.
Connector missing
A
Require repair.
Contaminated
A
Require repair or replacement.
Inoperative
B
Require repair or replacement. Further
inspection required. See note below.
NOTE: Inoperative includes intermittent operation or out of OEM specification. Some
components may be serviceable; check for accepted cleaning procedure.
Leaking
A
Require repair or replacement.
Missing
C
Require replacement.
Terminal broken
A
Require repair or replacement.
Terminal burned, affecting
performance
A
Require repair or replacement. See note
below.
NOTE: Determine cause and correct prior to repair or replacement of part.
Terminal burned, not affecting
performance
2
Suggest repair or replacement.
Terminal corroded, affecting
performance
A
Require repair or replacement.
Terminal corroded, not affecting
performance
2
Suggest repair or replacement.
Terminal loose, affecting
performance
B
Require repair or replacement.
Terminal loose, not affecting
performance
1
Suggest repair or replacement.
Threads damaged
A
Require repair or replacement.
Threads stripped (threads missing)
A
Require replacement.
Wire lead conductors exposed
B
Require repair or replacement.
Wire lead corroded
A
Require repair or replacement.
Wire lead open
A
Require repair or replacement.
Wire lead shorted
A
Require repair or replacement.
1998 Chevrolet Pickup C1500
Uniform Inspection and Communication Standards BRAKE SYSTEMS
See Brake Fluid.
FLUID LEVEL SENSOR SWITCHES
See Switches.
FOUR WHEEL DRIVE SWITCHES
See Switches.
FRICTION MATERIAL
Friction Material
NOTE:
Original Equipment Manufacturer (OEM) specifications designate replacement
at different thicknesses.
CAUTION: It is required that friction material be matched in axle sets for consistent
braking characteristics.
Condition
Code
Procedure
Contaminated, for example, fluid
that leaked from caliper, wheel
cylinder, or axle seal
A
Require replacement. See note below
NOTE: Identify and repair cause of contamination prior to replacing friction material.
Cracked through
B
Require replacement.
Flaking or chunking
B
Require replacement.
Glazed (shiny)
No service suggested or required.
Grooves or ridges
No service suggested or required. See note
below.
NOTE: When reconditioning or replacing drums or rotors, replacement of friction
material may be suggested depending on the severity of the grooves or ridges.
Permanently attached hardware
bent
A
Require replacement.
Permanently attached hardware
broken
A
Require replacement.
Permanently attached hardware
loose
A
Require replacement.
Permanently attached hardware
missing
C
Require replacement.
Permanently attached hardware
seized
A
Require repair or replacement.
Rivets loose
B
Require replacement.
1998 Chevrolet Pickup C1500
Uniform Inspection and Communication Standards BRAKE SYSTEMS
Separating from backing
B
Require replacement.
Shoe table or web bent
B
Require replacement.
Shoe table or web cracked
A
Require replacement.
Shoe table or web worn, affecting
performance
A
Require replacement.
Surface cracking
No service suggested or required. Further
inspection may be necessary to determine
cause.
Tapered wear
B
Suggest replacement See note below.
NOTE: Some vehicles use pads that are tapered by design. Refer to specific vehicle
application. If not normal, require replacement of pads and correction of cause.
Thickness of one pad is greater
than opposite pad in the same
caliper (uneven wear)
Replacement of friction material not suggested
or required. Further inspection required. See
Calipers and Caliper Hardware. See note
below.
NOTE: Uneven pad thickness is normal on some vehicles. Refer to specific vehicle
applications.
Wear indicator device (electronic)
contacts rotor
B
Require replacement of appropriate parts. See
caution below.
CAUTION: The pad wear indicator light may come on due to other electrical problems.
Wear indicator device
(mechanical) bent
Further inspection required. See note below.
NOTE: Explain to the customer that the purpose of the wear indicator is to alert him or
her to check for friction wear. Wear indicators may be bent or broken. Therefore, the
friction material must be measured. The need for friction material replacement is
determined based upon the conditions stated in this section. Periodic inspection is
suggested.
Wear indicator device
(mechanical) broken
Further inspection required. See note below.
NOTE: Explain to the customer that the purpose of the wear indicator is to alert him or
her to check for friction wear. Wear indicators may be bent or broken. Therefore, the
friction material must be measured. The need for friction material replacement is
determined based upon the conditions stated in this section. Periodic inspection is
suggested.
Wear indicator device
(mechanical) contacts rotor
Further inspection required. See note below.
NOTE: Explain to the customer that the purpose of the wear indicator is to alert him or
her to check for friction wear. Wear indicators may be bent or broken. Therefore, the
friction material must be measured. The need for friction material replacement is
determined based upon the conditions stated in this section. Periodic inspection is
suggested.
Worn close to minimum
specifications
1
Suggest replacement. See note below.
1998 Chevrolet Pickup C1500
Uniform Inspection and Communication Standards BRAKE SYSTEMS
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