SECTION 7 - DIAGNOSTIC TROUBLE CODES
3121788
7-17
4476 BATTERY VOLTAGE TOO HIGH –
UNPLUG CHARGER
None
4_4
• Enter SafeMode
• LiftDownState = MAX
The Ground Module momentarily measured
excessively high battery voltage (VBAT)
(>32.0V) and entered SafeMode to protect sys-
tem devices. This may be due to improper bat-
tery charging or incorrect voltage batteries being
used.
•
The Ground Module measured battery volt-
age greater than 32.0V and ChargeInterlock-
State = TRUE.
•
Main Line Contactor and Battery Relay should
be de-energized
•
Suppress all Help Messages caused by the lack
of system power.
X
4477 BATTERY VOLTAGE TOO HIGH –
FORCING DISCHARGE
None
4_4
• Disable VSW,
LiftDownState = PREVENTED
LiftUpState = PREVENTED
DriveState = PREVENTED sup-
press other system errors, then
Energize STEER_R_VLV and
STEER_L_VLV and monitor
VBAT
The Ground Module momentarily measured
excessively high battery voltage (VBAT)
(>32.0V) and entered SafeMode. This may be
due to improper battery charging or incorrect
voltage batteries being used.
•
The Ground Mddule measured battery volt-
age greater than 32.0V and ChargeInterlock-
State = FALSE.
•
System Devices powered by VSW will be dis-
abled
•
Suppress all DTC Messages caused by the lack
of system power. (Pump Module, Platform
Module, Tilt Sensors, LSS, and Pot-Hole Pro-
tection)
•
GM shall energize STEER_L_VLV and
STEER_R_VLV in an effort to lower float
charge down below 31V to get to normal
operation state.
•
If VBAT reading does not go below 31V after
10 seconds, GM shall denenergize the
STEER_L_VLV and STEER_R_VLV and latch
DTC 442.
•
If VBAT reading does go below 31V before 10
seconds, GM shall enable VSW and resume
with normal startup procedure.
X
4478 GROUND MODULE - OVERCUR-
RENT
None
4_4
• Enter SafeMode
• LiftDownState = MAX
The current being measured through the Ground
Module is too high.
•
The Ground Module measure more than 8
Amps through the VSW switch.
X
448
VOLTAGE REFERENCE OUT OF
RANGE
None
4_4
• LiftUpState = PREVENTED
• DriveState = PREVENTED
The Ground Modules 3.3V supply voltage was
measured to be out of range (<3.135V or
>3.465V). This may be caused by issues with the
3.3V supply or the V5P0 reference supply on the
Ground Module.
X
Table 7-1. Diagnostic Trouble Codes (DTC)
DTC
Help Message
Alarm
Flash
Code
Action
Trigger
3246R
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