Dodge ram truck 3500 1996 Service Manual page 1357

BR
FUEL SYSTEM 14 - 123
D I A G N O S I S A N D T E S T I N G
(Continued)
(9) Be sure that the intake manifold air heater
electrical cable connections at the intake manifold
are tight and free of corrosion (Fig. 22).
UPPER PART OF
INTAKE MANIFOLD J9414-105
Fig. 22 Air Heater Cable Connections
(10) Inspect the throttle linkage and accelerator
linkage for binding.
(11) Be sure that the throttle return spring is con­
nected.
(12) Inspect all fuel supply and return lines for
signs of leakage.
(13) Be sure that the ground connections are tight
and free of corrosion. Refer to Group 8, Wiring for
locations of ground connections.
(14) Inspect the air cleaner element (filter) for
restrictions by using the built-on Filter Minder®. Do
not remove the top of air cleaner housing to inspect
condition of air cleaner element. Refer to Diesel
Engine Component Removal/Installation section for
Filter Minder information.
(15) Be sure that the turbocharger output hose is
connected to the charge air cooler (intercooler) inlet
tube. Verify that the charge air cooler output hose is
connected to the cooler and the intake manifold.
(16) Be sure that the vacuum pump-to-brake
booster hose is connected and not damaged.
(17) Be sure that the accessory drive belt is not
damaged or slipping.
(18) Automatic Transmission Only: Raise the vehi­
cle and check the electrical connection at the trans­
mission temperature sensor (Fig. 23).
TEMPERATURE SENSOR J9414-46
Fig. 23 Transmission Temperature Sensor
Location—Typical
(19) Automatic Transmission Only: Be sure the
electrical connector is firmly connected to the plug
leading to the overdrive solenoid in the transmission.
AUTOMATIC SHUTDOWN (ASD) RELAY TEST
To perform a complete test of the ASD relay and its
circuitry, refer to the DRB scan tool and appropriate
Powertrain Diagnostics Procedures manual. To test
the relay only, refer to Relays—Operation/Testing in
this section of the group.
ENGINE SPEED SENSOR TEST
To perform a complete test of this sensor and its
circuitry, refer to the appropriate Powertrain Diag­
nostic Procedures manual.
INTAKE MANIFOLD AIR TEMPERATURE
SENSOR
TEST
To perform a complete test of this sensor and its
circuitry, refer to DRB scan tool and appropriate
Powertrain Diagnostics Procedures manual. To test
the sensor only, refer to the following:
(1) Disconnect the wire harness connector from the
intake manifold air temperature sensor. The sensor
is located on the top of the intake manifold and to
the rear of the air heater (Fig. 24).
(2) Test the resistance of the sensor with an input
impedance (digital) volt-ohmmeter. The resistance (as
measured across the sensor terminals) should be less
than 1340 ohms with the engine warm. Refer to the
Sensor Resistance (OHMS)—Intake Manifold Air
Temperature resistance chart (Fig. 25). Replace the
sensor i f i t is not within the range of resistance spec­
ified in the chart.