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 TM 9-2330-329-14&P
ABS DIAGNOSTICS/ECU VALVE REPLACEMENT
THIS WP COVERS:
ABS Diagnostics, ECU Valve Removal, ECI Valve Installation, Follow-On Tasks
INITIAL SETUP:
Maintenance Level
Tools and Special Tools
Organizational
Tool kit, general mechanic's (item 4, WP 0156 00)
Equipment Conditions
Semitrailer disconnected from prime mover (refer
to WP 0007 00)
Semitrailer grounded (refer to WP 0007 00)
Air reservoir drained (refer to WP 0007 00)
Negative terminal disconnected from battery (refer
to WP 0007 00)
ABS DIAGNOSTICS
NOTE
The ABS warning light must operate. If nonoperational,
correct that fault before proceeding.
Table 1. ABS Diagnostic Blink Codes.
Blink Code
Problem Area
Action
3
Sensor BU1
Check sensor installation.
Roadside front
Make necessary repairs.
4
Sensor YE1
Check sensor installation.
Curbside front
Make necessary repairs.
5
Sensor BU2
Check sensor installation.
Roadside rear
Make necessary repairs.
6
Sensor YE2
Check sensor installation.
Curbside rear
Make necessary repairs.
7
External ABS modulator
Verify proper electrical installation. Check power supply.
valve
Make necessary corrections.
9
Internal modulator failure,
Very proper installation. If code continues, replace inlet
inlet valve #2
valve #2.
10
Internal modulator failure,
Verify proper installation. If code continues, replace inlet
inlet valve #1
valve #1.
11
Internal modulator failure,
Verify proper installation. If code continues, replace outlet
outlet valve
valve.
14
Power supply
Verify proper electrical installation. Check power supply.
Make necessary corrections.
15
ECU failure
Verify proper installation. If code continues, replace ECU.
16
SAE J1708 failure
Replace ECU.
17
SAE J2497 (PLC) failure
Replace ECU.
18
Generic I/O failure
Verify proper electrical installation. Check power supply.
Make necessary corrections.
0067 00-1
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