Dodge Nitro. Manual — part 734
Fig. 17: Recirculation Door Actuator, Screws & Air Inlet Housing
Courtesy of CHRYSLER LLC
1. Disconnect and isolate the negative battery cable.
2. On LHD models, remove the glove box bin. Refer to REMOVAL .
3. On RHD models, remove the instrument panel. Refer to REMOVAL .
4. Remove the two screws (2) that secure the recirculation door actuator (1) to the air inlet housing (3).
5. Disconnect the wire harness connector from the recirculation door actuator and remove the actuator from
the vehicle.
INSTALLATION
ACTUATOR-RECIRCULATION DOOR
Fig. 18: Recirculation Door Actuator, Screws & Air Inlet Housing
NOTE:
LHD model shown. RHD model similar.
2007 Dodge Nitro R/T
2007 HVAC Heating & Air Conditioning - Service Information - Nitro
Courtesy of CHRYSLER LLC
1. Connect the wire harness connector to the recirculation door actuator (1).
2. Position the recirculation door actuator to the side of the air inlet housing (3). Make sure the actuator
output shaft is properly aligned to the recirculation door pivot shaft. If necessary, rotate the actuator
slightly to engage the splines on the output shaft with those in the pivot shaft.
3. Install the two screws (2) that secure the recirculation door actuator to the air inlet housing. Tighten the
screws to 1.2 N.m (10 in lbs.).
4. On RHD models, install the instrument panel. Refer to INSTALLATION .
5. On LHD models, install the glove box bin. Refer to INSTALLATION .
6. Reconnect the negative battery cable.
7. Initiate the Actuator Calibration function using a scan tool. See *HVAC SYSTEM TEST .
CLUTCH-A/C COMPRESSOR
DESCRIPTION
CLUTCH-A/C COMPRESSOR
Fig. 19: Bolt, Clutch Plate, Pulley Assembly, Stationary Electromagnetic Field Coil, Snap Ring & Shims
Courtesy of CHRYSLER LLC
The A/C system on models equipped with the 2.8L and 4.0L engine use a Zexel DKS-17DS A/C compressor.
The clutch assembly for this A/C compressor consists of a stationary electromagnetic field coil (4), bearing and
pulley assembly (3), shims (6), and a clutch plate (2) that is splined to the compressor shaft and secured by a
bolt (1). These components provide the means to engage and disengage the A/C compressor from the engine
accessory drive belt.
The A/C clutch field coil is pressed onto the front of this A/C compressor and cannot be serviced separately
NOTE:
LHD model shown. RHD model similar.
2007 Dodge Nitro R/T
2007 HVAC Heating & Air Conditioning - Service Information - Nitro
from the compressor. The A/C clutch bearing and pulley assembly is retained to the front of the compressor by
a snap ring (5) and can be serviced separately.
CLUTCH-A/C COMPRESSOR
Fig. 20: Bolt, Clutch Plate, Pulley Assembly, Stationary Electromagnetic Field Coil, Snap Ring & Shims
Courtesy of CHRYSLER LLC
The A/C system on models equipped with the 3.7L engine use the Visteon HS-18 A/C compressor. The clutch
assembly for this A/C compressor consists of a stationary electromagnetic field coil (4), bearing and pulley
assembly (3), shims (7), and a clutch plate (2) that is splined to the compressor shaft and secured by a bolt (1).
These components provide the means to engage and disengage the A/C compressor from the engine accessory
drive belt.
The A/C clutch field coil is pressed onto the front of this A/C compressor and retained with a snap ring (6). The
2007 Dodge Nitro R/T
2007 HVAC Heating & Air Conditioning - Service Information - Nitro
A/C clutch bearing and pulley assembly is also retained to the front of this compressor by a snap ring (5). Both
the A/C clutch bearing and pulley assembly and the field coil can be serviced separately.
OPERATION
CLUTCH-A/C COMPRESSOR
The A/C compressor clutch components provide the means to engage and disengage the A/C compressor from
the engine accessory drive belt. When the electromagnetic A/C clutch field coil is energized, it magnetically
draws the clutch plate into contact with the clutch pulley and drives the compressor shaft. When the coil is not
energized, the pulley freewheels on the clutch hub bearing, which is part of the pulley assembly.
A/C compressor clutch engagement is controlled by the powertrain control module (PCM) or the engine control
module (ECM), depending on engine application. When the A/C-heater control is set to any A/C position, it
sends a request signal on the CAN-B bus to the totally integrated power module (TIPM), which then transfers
the request on the CAN-C Bus to the PCM/ECM, which determines if operating conditions are correct for A/C
clutch engagement. When all operating conditions have been met, the PCM/ECM sends a signal on a dedicated
hard-wired circuit back to the totally integrated power module (TIPM) to energize the internal A/C clutch high
side driver. When energized, the A/C clutch high side driver provides battery current to the A/C clutch field
coil.
The A/C clutch control system is diagnosed using a scan tool (refer to HEATING & AIR CONDITIONING -
ELECTRICAL DIAGNOSTICS and to appropriate Engine ELECTRICAL DIAGNOSTICS article for more
information).
The A/C compressor clutch components cannot be adjusted or repaired and must be replaced if found
inoperative or damaged.
DIAGNOSIS AND TESTING
CLUTCH-A/C COMPRESSOR
The A/C compressor clutch coil electrical circuit is controlled by the powertrain control module (PCM) or the
engine control module (ECM) (depending on engine application) through the totally integrated power module
(TIPM). See OPERATION. Begin testing of a suspected compressor clutch coil problem by performing the
preliminary checks.
PRELIMINARY CHECKS
1. Using a scan tool, check for diagnostic trouble codes (DTCs) in the A/C-heater control, TIPM and the
PCM/ECM. If no DTCs are found, go to step 2. If any DTCs are found, repair as required.
2. If the A/C compressor clutch still will not engage, verify the refrigerant charge level. See
REFRIGERANT SYSTEM LEAKS. If the refrigerant charge level is OK, go to step 3. If the refrigerant
charge level is not OK, adjust the refrigerant charge as required.
3. If the A/C compressor clutch still will not engage, disconnect the wire harness connector from the A/C
pressure transducer and check for battery current at the connector with the engine running and the A/C-
heater control set to the A/C mode. If OK, go to step COIL CURRENT DRAW TEST, and/or step
COIL RESISTANCE TEST - 2.8L AND 4.0L ENGINES ONLY.
2007 Dodge Nitro R/T
2007 HVAC Heating & Air Conditioning - Service Information - Nitro
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст