Dodge RAM TRUCK 1500 1995 Service Manual page 1141

B R
GENERAL DIAGNOSIS—EXCEPT DIESEL 14 - 59
TRANSMISSION COOLING
LINE
i INTAKE MANIFOLD
o AIR TEMPERATURE
SENSOR
TRANSMISSION
TEMPERATURE SENSOR
J9414-46
Fig. 22 Transmission Temperature Sensor
Location—Typical
ture Sensors resistance chart. Replace the sensor if it
is not within the range of resistance specified in the
chart.
FUEL PUMP RELAY TEST
To perform a complete test of this relay and its cir­
cuitry, 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.
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 temperature sensor (Figs. 23, 24 or
25).
THROTTLE -
BODY ^
BRACKET
SUPPORT BRACKET
INTAKE
MANIFOLD
AIR
TEMPERATURE
SENSOR
J9414-12
J9314-162
Fig. 24 Sensor Location—5.2L/5.9L V-8 Engines—
Typical
INTAKE MANIFOLD
AIR TEMP.
SENSOR
VI K I
Fig. 23 Sensor Location—3.9L V-6 Engine—Typical
J948D-10
Fig. 25 Sensor Location—8.0L V-10 Engine—Typical
(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)—Engine Coolant, Intake
Air and Transmission Temperature Sensors resis­
tance chart. Replace the sensor if it is not within the
range of resistance specified in the chart.
(3) Test the resistance of the wire harness. Do this
between the powertrain control module (PCM) wire
harness connector terminal 21 and the sensor con­
nector terminal. Also check between terminal 4 to the
sensor connector terminal. Repair the wire harness
as necessary if the resistance is greater than 1 ohm.
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
TEST
To perform a complete test of MAP sensor and its
circuitry, refer to DRB scan tool and appropriate
Powertrain Diagnostics Procedures manual. To test
the MAP sensor only, refer to the following: