TM 5-2330-325-14&P
4-51A. ELECTRONIC CONTROL UNIT (ECU) OPERATING TEST (Continued).
Blink
Problem
Action
Code
Area
3
Sensor BU1
Determine sensor location. Check sensor installation.
Conduct sensor test. Replace sensor (Ref. para. 4-52A).
Check sensor extension installation.
4
Sensor YE1
Determine sensor location. Check sensor installation.
Conduct sensor test. Replace sensor (Ref. para. 4-52A).
Check sensor extension installation.
5
Sensor BU2
Determine sensor location. Check sensor installation.
Conduct sensor test. Replace sensor (Ref. para. 4-52A).
Check sensor extension installation.
6
Sensor YE2
Determine sensor location. Check sensor installation.
Conduct sensor test. Replace sensor (Ref. para. 4-52A).
Check sensor extension installation.
7
External ABS
Verify proper electrical installation. Check power supply.
modulator valve
Replace ECU (Ref. para. 4-52).
9
Internal modulator
Verify proper installation. If code continues, replace ECU
failure, inlet valve #2
(Ref. para. 4-52).
10
Internal modulator
Verify proper installation. If code continues, replace ECU
failure, inlet valve #1
(Ref. para. 4-52).
11
Internal modulator
Verify proper installation. If code continues, replace ECU
failure, outlet valve
(Ref. para. 4-52).
14
Power Supply
Verify proper electrical installation. Check power supply.
Check for voltage readings of 11 - 16 volts Replace ECU (Ref.
15
ECU Failure
Verify proper installation. If code continues, replace ECU (Ref.
16
SAE J1708 Failure
Internal failure. Replace ECU (Ref. para. 4-52).
17
SAE J2497 Failure
Internal failure. Replace ECU (Re. para. 4-52).
18
Generic I/O Failure
Verify proper electrical installation. Check power supply.
Check for voltage readings of 11 - 16 volts. Replace ECU (Ref.
FOLLOW-ON TASKS:
None.
4-65
