wsm M6040 Workshop Manual page 560

M6040, M7040, WSM
Temperature Control Dial Checking
1. Turn the temperature control dial counterclockwise till it stops
(at "COOL" position).
2. Measure the voltage with a voltmeter across the terminal b and
terminal d. Make the following measurement with the terminals
connected.
3. Turn the main switch to "ON" position.
4. Check that an output voltage is approximately 10 V when
turning the temperature control dial clockwise till it stops
("WARM" position).
5. Turn the main switch back to "OFF" position.
6. Turn the temperature control dial clockwise till it stops
("WARM" position).
7. Measure the voltage with a voltmeter across the terminal d and
terminal b. Make the following measurement with the terminals
connected.
8. Turn the main switch to "ON" position.
9. Check that an output voltage is approximately 10 V, when
turning the temperature control dial counterclockwise till it stops
("COOL" position).
10. If an output voltage differs from approximately 10 V, the control
panel, wiring harness of fuse is faulty.
(1) 16P Connector (Switch Side)
(2) 16P Connector (Wire Harness Side)
Recirculation / Fresh Air Selection Switch Checking
1. Measure the voltage with a voltmeter across the terminal c and
chassis. Make the following measurement with the terminals
connected.
2. Turn the main switch to "ON" position.
3. Press the recirculation/fresh air selection switch to set it at fresh
air position (indicator: OFF), and then measure a voltage using
a circuit tester.
4. Turn the main switch back to "OFF" position.
5. Measure the voltage with a voltmeter across the terminal a and
chassis. Make the following measurement with the terminals
connected.
6. Turn the main switch to "ON" position.
7. Press the recirculation/fresh air selection switch to set it at
recirculation position (indicator: ON), and then measure a
voltage using a circuit tester.
8. If a measured voltage does not comply with the values in the
table below, the control panel, wiring harness or fuse is faulty.
Terminal c
– Chassis
Voltage
Terminal a
– Chassis
(1) 16P Connector (Switch Side)
(2) 16P Connector (Wire Harness Side)
10-S26
(A) "COOL" position to "WARM"
position
(B) "WARM" position to "COOL"
position
9Y1210143CAS0045US0
Recirculation /
fresh air
selection switch Approx. battery voltage
at "Fresh Air"
(indicator: OFF)
Recirculation /
fresh air
selection switch Approx. battery voltage
at "Recirculation"
(indicator: ON)
(A) Fresh Air (Indicator: OFF)
(B) Recirculation (Indicator: ON)
9Y1210143CAS0046US0
CABIN
KiSC issued 07, 2012 A