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Check CAN RPC & J1939 Interfaces To The IM
1. CAN/J1939 - (IM1-q,r,s): confirm fault A184,
J1939 Not Connected, is not active.
2. CAN/RPC (IM1-I,j,k) - confirm fault A257, Pay-
load CAN/RPC Not Connected, is not active.
Check Outputs From The Interface Module
Note: Before performing these next steps, the key
switch must be turned off for at least 7 minutes to
allow the IM to completely shutdown. Confirm that
the IM has shutdown by verifying that the green LED
on the IM controller has stopped flashing. While
performing the following IM output checks, ensure
that no output short circuit fault codes are reported
by the IM Realtime Data Monitor software.
1. Key on and shift into neutral. Confirm that park
brake solenoid is energized by verifying that coil
is magnetized. Use the GE DID panel to set the
truck speed to a speed above 1 kph. Shift into
park. Confirm that the park brake solenoid
remains energized. Reduce the truck speed to 0
kph. Confirm that the park brake solenoid de-
energizes.
2. Connect circuit 52B at TB35-L to 24 volts and
confirm that the Battery Charger Failure lamp
energizes.
D13004
VHMS CHECK-OUT & TROUBLESHOOTING
3. With circuit 52B at TB35-L still shorted to 24
volts, confirm that the IM Warning lamp ener-
gizes.
4. With circuit 52B at TB35-L still shorted to 24
volts, confirm that the Engine Start Fail lamp
energizes.
5. With circuit 52B at TB35-L still shorted to 24
volts, confirm that the Low Fuel lamp energizes.
6. Disconnect park brake pressure switch. With
circuit 52B at TB35-L still shorted to 24 volts,
confirm that the Park Brake lamp energizes.
Reconnect pressure switch.
7. With circuit 52B at TB35-L still shorted to 24
volts, confirm that the High Hydraulic Oil Temp
lamp energizes. Remove 24 volts from TB35-L.
8. Check the Hydraulic Oil Temperature gauge by
placing a 316 ohm resistor (a range of 300 to
332 ohms should work) between circuit 5VIM on
TB33-L and 34BT4 on TB21-P. Verify that the
gauge
needle
pointer
Remove the resistor.
moves
clockwise.
D13-9
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