TM 5-2420-230-24-1
7.2 Selftest Operation
Selftest modes can only be started WHILE POWERING UP the EGS.
Invocation of a certain mode is done by moving the shift lever to a specific position while switching on
the power of the EGS.
Leaving the selftest mode is done by switching OFF the power of the EGS.
7.2.1 Selftest mode invocation
Below table lists what conditions must be satisfied during POWERUP to get into a specific selftest
mode :
SELFTEST MODE
TO ENTER MODE
INPUT TEST
FWD & UP
SPEED SENSOR TEST
REV & UP
OUTPUT TEST
FWD & DOWN
7.2.2 Input test
When EGS shiftlever is held in the forward up position while power is applied, INPUT TEST mode
is activated.
In this mode, driving is not possible, since all EGS outputs remain off until the testmode is left.
This test is used to verify operation of the shiftlever and its inputs.
The LED's (gearposition indicators) on the EGS top cover are used to display test
information :
SHIFT LEVER POSITION
LED COLOUR
LED NUMBER
Neutral
RED
4
UP (*)
RED
5
DOWN (*)
RED
3
FWD
GREEN
4
FWD & UP
GREEN
5
FWD & DOWN
GREEN
3
REV
YELLOW
4
REV & UP
YELLOW
5
REV & DOWN
YELLOW
3
wire 14 = GROUND
RED
1 (together with above LED)
wire 15 = GROUND
GREEN
1 (together with above LED)
Note : If wire 14 and wire 15 are grounded simultaneously LED '1' lights up YELLOW
(*) : these shift lever positions can NOT be selected on a STANDARD type EGS.
EGS user manual. Page 21 of 25
SPICER CLARK-HURTH
Document reference : egsman4.doc
Revision date: 07/04/97
Ten Briele 3, 8200 Brugge, Belgium
Tel: +32/50/402445
Fax: +32/50/402402
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