Section 06: ELECTRICAL
PA1593
19
Certain inputs are doubled (door operating
buttons) and also other inputs activate at the
same time (ex. kneeling switch and Kneeling
proximity sensor switch). For these inputs, 2
beeps are emitted. If only one beep is heard,
one of the inputs is defective.
SWITCHES AND SENSORS SUPPORTED
BY THE SWITCH/SENSOR TEST MODE
HVAC control unit driver’s section ON/OFF
HVAC control unit driver recirculate switch
HVAC overhead compartment fan switch
Engine rear start selector switch “rear start”
Engine rear start selector switch “normal”
Engine ignition front switch
Engine ignition rear switch
Entrance door inside opening /closing switch
Entrance door outside opening /closing switch
Kneeling down switch
Electric horn button
LH turn signal
RH turn signal
Headlights beam toggle switch
Windshield wipers intermittent position switch
Windshield washer switch
Kneeling up switch
Interior lighting switch, 2 positions
Driver’s area lighting switch
Reading lights switch
Hazard warning flashers switch
Headlights switch, 2 positions
Tag axle lever
Wheelchair lift activation switch
Windshield lower wiper
The following inputs, either certain options or
sensors which are difficult to activate, are not
supported by the switch/sensor test:
Service chime enable switch,
Horn selector switch,
Outside rear view mirror heat,
Mirror control switches,
Low-buoy switch,
Starter sensor,
ABS warning input,
WCL switch,
Driver's power window switch,
Fog lights switch,
Alternator sensors 1 & 2,
Retarder active signal,
Radiator fan speed 1 & 2 signals.
In test mode, with the parking brake applied and
the passenger set point set to a value higher
than 64°F (18°C), the circulator pump is not set
to OFF as it would normally do when the outside
temperature gets above 50°F (10°C). This
feature allows verification of the pump when
inside a garage. This is also useful when
working on the heating system to remove air
pockets trapped in the system. Motor Test
Sequence
This test mode allows testing of the electrical
motors and electric contactors without the need
to have the engine running. Note that while in
test mode, the engine cannot be started.
Prerequisite conditions for the motor test mode:
A. The battery charger must be connected to a
110-120 volt power supply. If not, the test
will be interrupted when the voltage drops
below 24 volts,
B. Engine not running,
C. Parking brake applied,
DANGER
Before starting the test sequence, make sure
nobody is working in the evaporator or
condenser compartment.
NOTE
The back-up alarm will beep ten (10) times
prior the test starts to warn people that may be
working on the vehicle.
To enter this mode:
1. Using the dashboard DID, select
DIAGNOSTICS menu and press ENTER
button ;
2. Select VEHICLE TEST, press ENTER
button then select MOTOR TEST
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