152
Troubleshooting
9.2 Tag Axle Troubleshooting
ECUs 400 500 350 and 400 500 430 0 (Premium iABS units) are the only trailer ABS ECU/valve
assemblies that have the capability of the Tag Axle feature being able to be activated and turned on.
The
fi
rst step that should be taken when troubleshooting the Tag Axle system is to ensure that the system is
pneumatically plumbed correct and electric connections are also correct. Refer to Figure 9.15
in this section
for the correct schematic, depending upon the override switch con
fi
guration.
For additional information, refer to TP19030, Tag Axle Installation Manual, available at www.wabco-na.com.
When testing the Tag Axle system, ensure the trailer is supplied with 100-120 psi air pressure to the supply
air and 12 volts DC power rated at a minimum of 10 amps to the trailer‘s constant power circuit.
Use of a volt-ohm meter may be required.
The TOOLBOX PLUS™ Software is necessary to activate the Tag Axle function in the iABS Premium ECU.
This process can be found in the Tag Axle Installation Manual, TP19030.
This troubleshooting section is based on the use of TOOLBOX PLUS™ Software version 13 or higher.
If you have an earlier version of software, visit
wabco.snapon.com
to purchase and download the latest
version of the software.
Condition
Experienced
Action to Take
Troubleshooting Detail
s
Tag Axle
Function
Unavailable
in TOOLBOX
PLUS™
Software
Inspect WABCO iABS part
number
Ensure that GIO-capable WABCO iABS is installed.
Only 400 500 350 0 and 400 500 430 0 have Automatic
Lift Axle functionality.
Verify the WABCO TOOLBOX
PLUS™ Software version
Ensure TOOLBOX PLUS™ Software version 13.0 or
later is installed.
Tag Axle
Function Will
Not Activate
Cycle trailer power.
ECU valve should audibly click during its power-
up self-test. ABS warning light will illuminate and
extinguish as a light test. If warning light remains on,
begin diagnostics with TOOLBOX PLUS™ Software. If
the ECU fails to click, ensure that the sensor extension
cables and power cables are securely attached to the
ECU and ensure that 12 volts is present at pin B-1 on
the ECU power connector. Refer to Figure 9.14.
Retrieve diagnostic information
via TOOLBOX PLUS™
Software.
If warning light is on, begin diagnostics with TOOLBOX
PLUS™ Software. Repair and clear all faults found.
Ensure the tag axle system is
plumbed correctly.
Refer to Figure 9.15.
Inspect the cab-mounted tag
axle toggle switch.
Using an ohm meter, verify the switch functionality.
Switch should be a single-pole, single-throw
toggle switch. Refer to the switch manufacturer's
documentation for electrical contact information.
Verify toggle switch installation.
The cab-mounted toggle switch is connected to the
brown and yellow wires from the switch and indication
lamp cable 449 827 XXX 0. The green wire is unused
and capped. Refer to Figure 9.16.
Содержание 400 500 320 0
Страница 148: ...148 Troubleshooting Fig 9 9 4017182a...
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Страница 157: ...157 Troubleshooting Fig 9 16 4017187a Fig 9 17 4012475b 3 2 SOLENOID VALVE CABLE P N 472 170 997 0 1 2...
Страница 174: ...174 Troubleshooting Fig 9 35 4017186a...
Страница 187: ...187 Notes Notes...