SECTION 7 - DIAGNOSTIC TROUBLE CODES
7-10
3121788
321
LINE CONTACTOR WELDED OR
MISWIRED
None
3_2
• Drive State = PREVENTED
• Lift Up State = PREVENTED
The Line contactor is off, but the Power Module is
being energized. The line contactor’s coil or
power interconnect may be mis-wired. Alter-
nately, the line contactor is faulty (welded or
stuck).
•
The Power Module did not activate the Nega-
tive Main Contactor driver, but battery volt-
age was detected on the B+ terminal of the
controller.
Curtis Code 38: Main Contactor Welded
Set:
Just prior to the main contactor closing, the
capacitor bank voltage (B+ connection terminal)
was loaded for a short time and voltage did not
discharge.
Effect:
ShutdownMotor,ShutdownMainContac-
tor,ShutdownEMBrake, Shutdown Throttle, Full
Brake, Shutdown Pump
Possible Cause:
•
Main contactor tips are welded closed.
•
Motor phase U or V is disconnected or open
•
An alternate voltage path (such as an external
precharge resistor) is providing a current to
the capacitor bank (B+ connection terminal)
X
3213 POWER MODULE MAIN CON-
TACTOR - SHORT TO GROUND
OR OPEN CIRCUIT
None
3_2
• Drive State = PREVENTED
• Lift Up State = PREVENTED
Curtis Code 31: Coil 1 Driver Open/Short
Set:
Driver 1 (pin 6) is either open or shorted.
This fault can be set only when Main Enable =
Off
Effect:
ShutdownDriver1
Possible Cause:
•
Open or short on driver load.
•
Dirty connector pins.
•
Bad crimps or faulty wiring.
Curtis Code 31: Main Open/Short
Set:
Main Contactor Driver (pin 6) is either open
or shorted. This fault can be set only when Main
Enable = On
Effect
: ShutdownMotor,ShutdownMainContac-
tor,ShutdownEMBrake, Shutdown Throttle, Full
Brake, Shutdown Pump
Possible Cause:
•
Open or short on driver load.
•
Dirty connector pins.
•
Bad crimps or faulty wiring.
X
324
VALVE ENABLE DRIVER PERMA-
NENTLY ON
None
3_2
• Drive State = PREVENTED
• Lift Up State = PREVENTED
The VSW signal is shorted to Battery during
startup prior to enabling the VSW switch.
•
VSW > 5V when VSW switch is in the off
state.
X
331
BRAKE - SHORT TO BATTERY
None
3_3
• Disable Output
• Drive State = PREVENTED
• Lift Up State = PREVENTED
Short to Battery was detected on the
GM_V5-5_Tow_Out digital output.
X
3310 STEER RIGHT VALVE – OPEN
CIRCUIT
None
3_3
• Disable Output
• Drive State = PREVENTED
Open Circuit detected on STEER_R_VLV
X
Table 7-1. Diagnostic Trouble Codes (DTC)
DTC
Help Message
Alarm
Flash
Code
Action
Trigger
3246R
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