TCI Digital Output Tests:
Note: The lamp test switch on the Overhead Display
will not activate the G.E. propulsion system lamps
when the PTU is in the Manual Digital Output Test
mode.
1. Apply the park brake switch and place the Rest
switch in the OFF position.
2. On the TCI COMMUNICATION MENU, place
cursor on “Engine Stopped Tasks” and press
{enter}.
3. Place cursor on “Manual Test Screen”. Press
{enter}.
4. For Table II steps 1 through 17, turn on each
discrete output by highlighting it then pressing
{enter}. After the output is verified, press {enter}
to turn it off. Refer to Figure 3-4 for lamp location
and color.
Before performing step 18 (Table II), verify circuits
21SS and 21SR (MTU 396 engine) are removed
from the starters or 21 B (MTU/DDC 16V4000 or
Komatsu engine) are removed from starter sole-
noids and the parking brake is applied.
5. For Table II, step 18, change PTU from “Engine
Stopped Tasks” screen to Real Time Data
screen:
¤
{escape} {escape}
¤
cursor to “Normal Operation” {enter}
¤
cursor to “TCI Real Time Data” screen {enter}
a. Place selector switch in NEUTRAL and apply
park brake.
TABLE II: TCI DIGITAL OUTPUT TESTS
STEP DO NAME DESCRIPTION
LOCATION
(FIG. 3-4)
1 RESTLT Rest Light B6
2 PSCNOTRDY Propel System Not Ready Light C6
3 REDUCELT Reduced Propulsion Level Light D6
4 LINKONLT Link ON light, DID Panel (Behind Operator’s Seat)
5 TEMPWARNLT Propulsion System Temperature Warning Light C5
6 NORETARDLT No Retard, No Propel Light A5
7 NOPROPELLT No Propel Light A6
8 PSCWARNLT PSC Warning Light B5
9 RTRDCONTLT Reduced Retarding Light D6
10 HYDBHOTLT Hydraulic Brake Fluid Hot Light D5
11 PKBRKON
Verify park brake switch is applied:
Measure Circuit 52CS @ TB26 to ground: Verify 0.0 volts
Press {enter} to turn PKBRKON on: Verify approx. 24 volts
A3
12 RETARDLT Retard Light (on overhead display) D3
13 RETARDXLT Retard light (on top of cab and rear of truck)
14 BATSEPC
Battery Separate Relay
Measure Circuit 21BSR @ TB28 to ground
With BATSEPC highlighted, press {enter}: verify 0.0 VDC
15 SPEED1 not used
16 SPEED2 not used
17 REVERSELT Activates backup horn and backup lights B4
Refer to TCI Digital Output Test procedure step 5. before performing the following test:
18 ENGCRANK Engine Crank Signal
E3-14 AC Drive System Electrical Checkout Procedure 3/01 E03015
(Release 17 Software)
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