Dodge Ram Truck 1500-2500-3500. Manual — part 2007
BLEND OVERCURRENT (SINGLE-ZONE) (CONTINUED)
2.
CHECK THE (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C61) BLEND
DOOR DRIVER CIRCUIT, THE (C801) MODE DOOR 1 DRIVER CIRCUIT, & THE (C29) MODE DOOR 2
DRIVER CIRCUIT
Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Measure the resistance between the (C32) Recirculation Door Driver
circuit and the (C61) Blend Door Driver circuit, the (C801) Mode Door
1 Driver circuit, and the (C29) Mode Door 2 Driver circuit in the A/C
Heater Control C1 harness connector.
Is the resistance below 10k ohms on any of the circuits?
Yes
>> Repair all circuits with a resistance below 10k ohms for a
short to the (C32) Recirculation Door Driver circuit.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).
No
>> Go To 3
3.
CHECK THE (C61) BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C801) MODE DOOR 1
DRIVER CIRCUIT & THE (C29) MODE DOOR 2 DRIVER CIRCUIT
Measure the resistance between the (C61) Blend Door Driver circuit
and the (C801) Mode Door 1 Driver circuit and the (C29) Mode Door 2
Driver circuit in the A/C Heater Control C1 harness connector.
Is the resistance below 10k ohms on any of the circuits?
Yes
>> Repair all circuits with a resistance below 10k ohms for a
short to the (C61) Blend Door Driver circuit.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).
No
>> Go To 4
24 - 28
HVAC - ELECTRICAL DIAGNOSTICS
DR/DH
BLEND OVERCURRENT (SINGLE-ZONE) (CONTINUED)
4.
CHECK THE (C801) MODE DOOR 1 DRIVER CIRCUIT FOR A SHORT TO THE (C29) MODE DOOR 2
DRIVER CIRCUIT
Measure the resistance between the (C801) Mode Door 1 Driver cir-
cuit and the (C29) Mode Door 2 Driver circuit in the A/C Heater Con-
trol C1 harness connector.
Is the resistance below 10k ohms?
Yes
>> Repair the (C29) Mode Door 2 Driver circuit for a short to
the (C801) Mode Door 1 Driver circuit.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).
No
>> Go To 5
5.
CHECK THE (C34) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C32) RECIRCULATION
DOOR DRIVER CIRCUIT, THE (C61) BLEND DOOR DRIVER CIRCUIT, THE (C801) MODE DOOR 1 DRIVER
CIRCUIT, & THE (C29) MODE DOOR 2 DRIVER CIRCUIT
Measure the resistance between the (C34) Common Door Driver Cir-
cuit and the (C32) Recirculation Door Driver circuit, the (C61) Blend
Door Driver circuit, the (C801) Mode Door 1 Driver circuit, and the
(C29) Mode Door 2 Driver circuit in the A/C Heater Control C1 harness
connector.
Is the resistance below 30.0 ohms on any of the circuits?
Yes
>> Go To 6
No
>> Go To 7
DR/DH
HVAC - ELECTRICAL DIAGNOSTICS
24 - 29
BLEND OVERCURRENT (SINGLE-ZONE) (CONTINUED)
6.
CHECK THE DOOR DRIVER CIRCUITS WHOSE RESISTANCE WAS BELOW 30.0 OHMS IN THE
PREVIOUS STEP FOR A SHORT TO THE (C34) COMMON DOOR DRIVER CIRCUIT
Disconnect all door actuator harness connectors whose circuit resis-
tance was below 30.0 ohms.
Measure the resistance between the (C34) Common Door Driver cir-
cuit and each applicable door driver circuit in the A/C Heater Control
C1 harness connector.
Is the resistance below 10k ohms on any of the circuits?
Yes
>> Repair the door driver circuits with a resistance below 10k
ohms for a short to the (C34) Common Door Driver circuit.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).
No
>> Replace all door actuators with a resistance below 30.0
ohms in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT
CONTROL
MODULE
-
DIAGNOSIS
AND
TESTING).
7.
RUN THE ACTUATOR CIRCUIT TEST
Reconnect the A/C Heater Control C1 harness connector.
Turn the ignition on.
With the DRBIII
T
in HVAC, select System Tests and then select Actuator Circuit Test. Allow the test to run to com-
pletion before proceeding.
Does the DRBIII
T
display any Actuator Circuit Test fault messages?
Yes
>> Diagnose and repair the fault(s). Refer to *ACTUATOR CIRCUIT TEST DIAGNOSTICS (SINGLE-ZONE)
in this section.
No
>> 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/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING).
24 - 30
HVAC - ELECTRICAL DIAGNOSTICS
DR/DH
BLOWER NOT ON HIGH
DR/DH
HVAC - ELECTRICAL DIAGNOSTICS
24 - 31
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