DODGE RAM SRT-10 2006 Service Repair Manual

B1047–FLOOR/DEFROST MODE DOOR CONTROL CIRCUIT LOW (DUAL-ZONE)
For a complete wiring diagramRefer to Section 8W.

Theory of Operation
The A/C Heater Control drives the Mode Door 2 (Defrost to Floor) Actuator viathe(C801)ModeDoor2Driver
circuit and the (C34) Common Door Driver circuit. All of the door actuatorsshare the (C34) 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 thesame time for multiple actuators depend-
ing upon the type of short, its location, and the direction the actuator is moving when the short is present.
When Monitored:
When the Actuator DTC Detection Test is executed.
Set Condition:
If the (C801) Mode Door 2 Driver circuit is shorted to ground.
Possible Causes
(C801) MODE DOOR 2 DRIVER CIRCUIT SHORTED TO GROUND
(C801) MODE DOOR 2 DRIVER CIRCUIT SHORTED TO OTHER DOOR DRIVER CIRCUIT(S)
MODE DOOR 2 (DEFROST TO FLOOR) ACTUATOR
A/C HEATER CONTROL
Diagnostic Test
1.CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO GROUND
NOTE: If present, diagnose and repair DTC B10AB Right Blend
Door Control Circuit High or B10AA Right Blend Door Control Cir-
cuit Low before proceeding.
Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Measure the resistance of the (C801) Mode Door 2 Driver circuit
between ground and the A/C Heater Control C1 harness connector.
Istheresistancebelow10kohms?
Ye s>>
Repair the (C801) Mode Door 2 Driver circuit for a short to
ground.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No>>
Go To 2

2.CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS
Measure the resistance between the (C801) Mode Door 2 Driver circuit
and the (C61) Blend Door Driver circuit, the (C32) Recirculation Door
Driver circuit, the (C29) Mode Door 1 Driver circuit, and the (C33) Pas-
senger Blend Door Driver circuit in the A/C Heater Control C1 harness
connector.
Is the resistance below 10k ohms between the (C801) Mode
Door 2 Driver circuit and any of the other door driver circuits?
Ye s>>
Repair the circuit(s) with a resistance below 10k ohms for a
short to the (C801) Mode Door 2 Driver circuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No>>
Go To 3
3.CHECK MODE DOOR 2 (DEFROST TO FLOOR) ACTUATOR CIRCUIT RESISTANCE
Measure the resistance between the (C801) Mode Door 2 Driver circuit
and the (C34) Common Door Driver circuit in the A/C Heater Control C1
harness connector.
Is the resistance below 30 ohms?
Ye s>>
Go To 4
No>>
Go To 5

4.CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON DOOR
DRIVER CIRCUIT
Disconnect the Mode Door 2 (Defrost to Floor) Actuator harness con-
nector.
Measure the resistance between the (C801) Mode Door 2 Driver circuit
and the (C34) Common Door Driver circuit in the A/C Heater Control C1
harness connector.
Istheresistancebelow10kohms?
Ye s>>
Repair the (C801) Mode Door 2 Driver circuit for a short to
the (C34) Common Door Driver circuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No>>
Replace the Mode Door 2 (Defrost to Floor) Actuator in
accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
5.RUN THE ACTUATOR DTC DETECTION TEST
Reconnect the A/C Heater Control C1 harness connector.
Turn the ignition on.
With the scan tool, erase HVAC DTCs.
With the scan tool, select System Tests and then select Actuator DTC Detection. When the test is complete, select
View DTCs.
Does the scan tool only display: B1047–FLOOR/DEFROST MODE DOOR CONTROL CIRCUIT LOW?
Ye s>>
Replace the A/C Heater Control in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
No, Other DTC(s) Displayed
Diagnose and repair the DTC(s). If multiple DTCs are present, beginning with the passenger blend door,
diagnose and repair all short high DTCs and then all short low DTCs. Refer tothe Table of Contents in
this Section for a complete list of HVAC related symptoms.
No, And No Other DTCs Displayed
Using the wiring diagram as a guide, inspect the wiring and connectors for conditions causing an inter-
mittent short. Repair as necessary.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).

B1047–FLOOR/DEFROST MODE DOOR CONTROL CIRCUIT LOW (SINGLE-ZONE)
For a complete wiring diagramRefer to Section 8W.

Theory of Operation
The A/C Heater Control drives the Mode Door 2 (Defrost to Floor) Actuator viathe(C801)ModeDoor2Driver
circuit and the (C34) Common Door Driver circuit. All of the door actuatorsshare the (C34) 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 thesame time for multiple actuators depend-
ing upon the type of short, its location, and the direction the actuator is moving when the short is present.
When Monitored:
When the Actuator DTC Detection Test is executed.
Set Condition:
If the (C801) Mode Door 2 Driver circuit is shorted to ground.
Possible Causes
(C801) MODE DOOR 2 DRIVER CIRCUIT SHORTED TO GROUND
(C801) MODE DOOR 2 DRIVER CIRCUIT SHORTED TO OTHER DOOR DRIVER CIRCUIT(S)
MODE DOOR 2 (DEFROST TO FLOOR) ACTUATOR
A/C HEATER CONTROL
Diagnostic Test
1.CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Measure the resistance of the (C801) Mode Door 2 Driver circuit
between ground and the A/C Heater Control C1 harness connector.
Istheresistancebelow10kohms?
Ye s>>
Repair the (C801) Mode Door 2 Driver circuit for a short to
ground.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No>>
Go To 2

2.CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS
Measure the resistance between the (C801) Mode Door 2 Driver circuit
and the (C61) Blend Door Driver circuit, the (C32) Recirculation Door
Driver circuit, and the (C29) Mode Door 1 Driver circuit in the A/C
Heater Control C1 harness connector.
Is the resistance below 10k ohms between the (C801) Mode
Door 2 Driver circuit and any of the other door driver circuits?
Ye s>>
Repair the circuit(s) with a resistance below 10k ohms for a
short to the (C801) Mode Door 2 Driver circuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No>>
Go To 3
3.CHECK MODE DOOR 2 (DEFROST TO FLOOR) ACTUATOR CIRCUIT RESISTANCE
Measure the resistance between the (C801) Mode Door 2 Driver circuit
and the (C34) Common Door Driver circuit in the A/C Heater Control C1
harness connector.
Is the resistance below 30 ohms?
Ye s>>
Go To 4
No>>
Go To 5

4.CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON DOOR
DRIVER CIRCUIT
Disconnect the Mode Door 2 (Defrost to Floor) Actuator harness con-
nector.
Measure the resistance between the (C801) Mode Door 2 Driver circuit
and the (C34) Common Door Driver circuit in the A/C Heater Control C1
harness connector.
Istheresistancebelow10kohms?
Ye s>>
Repair the (C801) Mode Door 2 Driver circuit for a short to
the (C34) Common Door Driver circuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No>>
Replace the Mode Door 2 (Defrost to Floor) Actuator in
accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
5.RUN THE ACTUATOR DTC DETECTION TEST
Reconnect the A/C Heater Control C1 harness connector.
Turn the ignition on.
With the scan tool, erase HVAC DTCs.
With the scan tool, select System Tests and then select Actuator DTC Detection. When the test is complete, select
View DTCs.
Does the scan tool only display: B1047–FLOOR/DEFROST MODE DOOR CONTROL CIRCUIT LOW?
Ye s>>
Replace the A/C Heater Control in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
No, Other DTC(s) Displayed
Diagnose and repair the other DTC(s). If multiple DTCs are present, beginning with the common circuit,
diagnose and repair all short high DTCs and then all short low DTCs. Refer tothe Table of Contents in
this Section for a complete list of HVAC related symptoms.
No, And No Other DTCs Displayed
Using the wiring diagram as a guide, inspect the wiring and connectors for conditions causing an inter-
mittent short. Repair as necessary.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).

B1048–FLOOR/DEFROST MODE DOOR CONTROL CIRCUIT HIGH (DUAL-ZONE)
For a complete wiring diagramRefer to Section 8W.

Theory of Operation
The A/C Heater Control drives the Mode Door 2 (Defrost to Floor) Actuator viathe(C801)ModeDoor2Driver
circuit and the (C34) Common Door Driver circuit. All of the door actuatorsshare the (C34) 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 thesame time for multiple actuators depend-
ing upon the type of short, its location, and the direction the actuator is moving when the short is present.
When Monitored:
When the Actuator DTC Detection Test is executed.
Set Condition:
If the (C801) Mode Door 2 Driver circuit is shorted to voltage.
Possible Causes
(C801) MODE DOOR 2 DRIVER CIRCUIT SHORTED TO VOLTAGE
A/C HEATER CONTROL
Diagnostic Test
1.CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO VOLTAGE
NOTE: If present, diagnose and repair DTC B10AB Right Blend
Door Control Circuit High or B10AA Right Blend Door Control Cir-
cuit Low before proceeding.
Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Turn the ignition on.
Measure the voltage of the (C801) Mode Door 2 Driver circuit.
Is the voltage above 0.2 volts?
Ye s>>
Repair the (C801) Mode Door 2 Driver circuit for a short to
voltage.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No>>
Go To 2
2.RUN THE ACTUATOR DTC DETECTION TEST
Turn the ignition off.
Reconnect the A/C Heater Control C1 harness connector.
Turn the ignition on.
With the scan tool in HVAC, select System Tests and then select Actuator DTCDetection. When the test is com-
plete, select View DTCs.
Does the scan tool only display: B1048–FLOOR/DEFROST MODE DOOR CONTROL CIRCUIT HIGH?
Ye s>>
Replace the A/C Heater Control in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
No, Other DTC(s) Displayed