MAN 650314:D
32
Symptom
Possible Problem
Solution
-----------------------------------------------------------------------------------------------------------------------------------
The Check Engine
The Engine Control Module
Connect a bulb with one wire to
indicator stays on
(ECM) needs to see the
keyed power and the other to
all of the time.
load of a light connected to it.
the CHECK ENG terminal.
The Function switches
The push-button switches are
Momentary push-button or toggle
do not operate
not connected to the control
switches must be connected to
properly.
box.
the SW1 and SW2 terminals
as described in the manual.
The wrong type of switch is
The switch terminal connected
being used.
to the control box should
normally be open. When the
the switch is activated, the
terminal should make contact
to ground.
The display system starts
SW2 terminal is constantly
Disconnect or replace the
up in the demonstration
connected to ground.
SW2 switch.
mode and remains in it.
The clock doesn’t keep
Constant power terminal is
Ensure Constant Power terminal
time.
losing power.
has 12v even when key is off.
Display is too dark or light.
Contrast need to be adjusted.
See manual for contrast adjusting
instructions.
VHX Series Specifications
SUPPLY
Voltage Range(BAT)
8 to 22 V
Ignition
> 8 V
INPUTS
Active High
Low Max Min High
High, Left, Right,
Gear, Wait, DIM
3.7 V
8.4 V
Active Low
Low Max Min High
SW1,SW2, Check
2.7 V
6.0 V
Brake, Cruise, 4 X 4
3.7 V
8.4 V
Tachometer
Setting
Low Max High Min
Normal
3.0 V
7.6 V
Low-Volt
0.9 V
4.1 V
Speedometer
Square Wave
Sin Wave
> 1.2 V
P-P
> 1.4 V
P-P
OUTPUT
WARN, SPD
< 600 mA
Current Draw
IGN Off
≈
0.3 mA
IGN On, LIGHT Off
≈
101 mA
IGN On, LIGHT On
≈
280 mA
Summary of Contents for VHX-66C-NOV
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