Dodge Ram Truck 1500-2500-3500. Manual — part 2013
EVAPORATOR TEMPERATURE SENSOR CIRCUIT OPEN (CONTINUED)
2.
CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT & (C121) SENSOR GROUND
CIRCUIT FUNCTION
Turn the ignition off.
Reconnect the A/C Heater Control C1 harness connector.
Disconnect the Evaporator Temperature Sensor harness connector.
Connect a jumper wire between the (C21) Evaporator Temperature
Sensor Signal circuit and the (C121) Sensor Ground circuit in the
Evaporator Temperature Sensor harness connector.
Turn the ignition on.
With the DRBIII
T
in Sensor Display, read the Evaporator Temperature
Sensor voltage.
Is the voltage below 0.10 volts?
Yes
>> Replace the Evaporator Temperature Sensor in accor-
dance with the Service Information.
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 (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR AN OPEN
Turn the ignition off.
Remove the jumper wire from the Evaporator Temperature Sensor har-
ness connector.
Disconnect the A/C Heater Control C1 harness connector.
Measure the resistance of the (C21) Evaporator Temperature Sensor
Signal circuit between the Evaporator Temperature Sensor harness
connector and the A/C Heater Control C1 harness connector.
Is the resistance below 5.0 ohms?
Yes
>> Go To 4
No
>> Repair the (C21) Evaporator Temperature Sensor Signal
circuit for an open.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT
CONTROL
MODULE
-
DIAGNOSIS
AND
TESTING).
24 - 52
HVAC - ELECTRICAL DIAGNOSTICS
DR/DH
EVAPORATOR TEMPERATURE SENSOR CIRCUIT OPEN (CONTINUED)
4.
CHECK (C121) SENSOR GROUND CIRCUIT FOR AN OPEN
Measure the resistance of the (C121) Sensor Ground circuit between
the Evaporator Temperature Sensor harness connector and the A/C
Heater Control C1 harness connector.
Is the resistance below 5.0 ohms?
Yes
>> 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 TEST-
ING).
No
>> Repair the (C121) Sensor Ground circuit for an open.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT
CONTROL
MODULE
-
DIAGNOSIS
AND
TESTING).
DR/DH
HVAC - ELECTRICAL DIAGNOSTICS
24 - 53
EVAPORATOR TEMPERATURE SENSOR CIRCUIT SHORTED
24 - 54
HVAC - ELECTRICAL DIAGNOSTICS
DR/DH
EVAPORATOR TEMPERATURE SENSOR CIRCUIT SHORTED (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:
With the ignition on.
•
Set Condition:
If the A/C Heater Control senses voltage is less than 0.06 volts on the (C21) Evaporator Temperature Sensor
Signal circuit.
Possible Causes
(C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO (C121) SENSOR GROUND
CIRCUIT
EVAPORATOR TEMPERATURE SENSOR
A/C HEATER CONTROL
NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC
is stored. Refer to HVAC System Test for stored DTC test procedures.
Diagnostic Test
1.
CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT VOLTAGE WITH THE SENSOR
DISCONNECTED
Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
With the DRBIII
T
in Sensor Display, read the Evaporator Temperature
Sensor voltage.
Is the voltage 4.9 volts or greater?
Yes
>> Replace the Evaporator Temperature Sensor in accor-
dance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).
No
>> Go To 2
DR/DH
HVAC - ELECTRICAL DIAGNOSTICS
24 - 55
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст