Morgan Olson Amazon P80 2019, Руководство по обслуживанию

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POSSIBLE CAUSE #2 ~ Servo motor failure
CORRECTIVE ACTION
~ If servo motor failure is suspected, the first step is to confirm that the electri-
cal connection at the servo motor is delivering the correct signal to the servo motor. With the ignition
switch turned to Accessory, unplug the servo connector and test according to the information in the
Mode Selection-Electrical and Mechanical Correlation diagram. If the electrical check is in agree-
ment with the Diagram and if the directional door is not obstructed, the likely problem is a failed servo
motor. Replace servo motor as required.
POSSIBLE CAUSE #3 ~ Control Panel Selector Switch is defective
CORRECTIVE ACTION ~ With the ignition turned to Accessory, unplug the connector from the plenum’s
servo motor and test according to the information in the Mode Selection-Electrical and Mechanical Cor-
relation diagram. If the test fails to find agreement with the Diagram there is a good possibility that the
Mode Selection Switch at the control panel is defective or electrical connection to it has failed. Replace
the Mode Selection Switch as required.
SECTION B: TEMPERATURE CONTROL PROBLEMS
PROBLEM
, Air temperature cannot be controlled
POSSIBLE CAUSE #1 ~ Water valve not operating
CORRECTIVE ACTION ~ Valve may not be receiving a signal from control panel, or valve is defective.
Disconnect the electrical connector form the valve. With the ignition switch turned to Accessory , check
for the presence of 12 volts between the red wire (+12 V) and the white wire (ground) as noted in the
Water Valve Electrical Diagram . The yellow/red signal wire will p12 V (full cold position) drop-
ping to zero volts (full hot position) as the temperature control knob is rotated clockwise. If the condition
at the connector is in agreement with the
Diagram, proceed as follows:
Step 1 Disconnect the water valve from
the 5/8” heater hoses.
Step 2 Carefully inspect the four small
terminal pins on the motor, make sure that
they are not bent or broken (it may be
necessary to remove the valve from the
vehicle’s firewall to perform all of these
checks).
Step 3 Reconnect the valve to its electri-
cal connector.
Step 4 Rotate the Temperature Control
knob and watch for any response from the
valve (in the full hot position the valve will
be visibly open; in the full cold position the
valve will be visibly closed).
Step 5 If no valve rotation is observed,
replace the valve.
POSSIBLE CAUSE #2 ~ Water valve not
electrically connected.
CORRECTIVE ACTION ~ Disconnect the
electrical connector from the valve. With
the ignition switch turned to Accessory,
check for the presence of 12 volts be-
tween the red wire (+12V) and the white
wire (ground) as noted in the Water Valve
Electrical Diagram
. The yellow/red sig-
nal wire will p12v (full cold position) dropping to zero volts (full hot position) as the temperature
control knob is rotated clockwise. If none of these conditions exist, refer to the Wiring Diagram and
examine the system’ wire harness for any loss of continuity. Repair as required.