B105F–CLIMATE CONTROL MOTOR(S) COMMON 1 CONTROL CIRCUIT LOW (MTC) (CONTINUED)
For the Manual Temperature Control (MTC) circuit diagram (Refer to 24 - HEATING & AIR CONDITIONING - SCHE-
MATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
When the Actuator DTC Detection Test is executed.
•
Set Condition:
If the (C34) Front Common Door Driver circuit is shorted to ground.
Possible Causes
(C34) FRONT COMMON DOOR DRIVER CIRCUIT SHORTED TO GROUND
(C34) FRONT COMMON DOOR DRIVER CIRCUIT SHORTED TO OTHER DOOR DRIVER CIRCUIT(S)
FRONT BLEND DOOR ACTUATOR
MODE DOOR 1 (FLOOR TO PANEL) ACTUATOR
MODE DOOR 2 (FLOOR TO DEFROST) ACTUATOR
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL
Theory of Operation
The A/C Heater Control drives the Front Blend Door Actuator via the (C61) Front Blend Door Driver circuit and the
(C34) Front Common Door Driver circuit. The A/C Heater Control drives the Mode Door 1 (Floor to Panel) Actuator
via the (C29) Mode Door 1 Driver circuit and the (C34) Front Common Door Driver circuit. The A/C Heater Control
drives the Mode Door 2 (Floor to Defrost) Actuator via the (C801) Mode Door 2 Driver circuit and the (C34) Front
Common Door Driver circuit. The A/C Heater Control drives the Recirculation Door Actuator via the (C32) Recircu-
lation Door Driver circuit and the (C34) Front Common Door Driver circuit. All of the front door actuators share the
(C34) Front Common Door Driver circuit. Inside the A/C Heater Control, each door actuator has its own unique
driver, but all share a single common door driver circuit. Due to the shared circuitry similar DTCs can set at the
same time for multiple actuators depending upon the type of short, its location, and the direction the actuator is
moving when the short is present.
HB
HVAC - ELECTRICAL DIAGNOSTICS
24 - 113