Dodge RAM TRUCK 1500 1995 Service Manual page 1139

B R
Fig. 17 Dual Oxygen Sensor Location—5.9L and
8.0L HDC Engines—Typical
SENSOR
ELECTRICAL
CONNECTOR
J9414-60
Fig. 18 Vehicle Speed Sensor—Typical
(27) Verify that electric fuel pump/gauge sender
unit wire connector is firmly connected to harness
connector. These can be inspected from over the top
of the left-rear wheel.
(28) Inspect fuel hoses at fuel pump/gauge sender
unit for cracks or leaks.
(29) Inspect transmission torque convertor housing
(automatic transmission) or clutch housing (manual
transmission) for damage to timing ring on drive
plate/flywheel.
(30) Verify that battery cable and solenoid feed
wire connections to the starter solenoid are tight and
clean. Inspect for chaffed wires or wires rubbing up
against other components.
GENERAL DIAGNOSIS—EXCEPT DIESEL 14 - 57
POWERTRAIN CONTROL MODULE (PCM) 60-WAY
CONNECTOR
For PCM 60-way connector wiring schematics, refer
to Group 8W, Wiring Diagrams.
SYSTEM SCHEMATICS
Refer to PCM System Schematics—Except Diesel
in the Multi-Port Fuel Injection (MFI)—Component
Description/System Operation—Except Diesel section
of this group.
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.
CAMSHAFT POSITION SENSOR TEST
Refer to Group 8D, Ignition Systems, for Camshaft
Position Sensor testing.
CRANKSHAFT POSITION SENSOR TEST
Refer to Group 8D, Ignition Systems, for Crank­
shaft Position Sensor testing.
iNGINE COOLANT 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 wire harness connector from coolant
temperature sensor (Figs. 19 or 20).
3.9L/5.2L/5.9L Engines with Air Conditioning:
When removing the connector from sensor, do not
pull directly on wiring harness. Fabricate an
L-shaped hook tool from a coat hanger (approximate­
ly eight inches long). Place the hook part of tool un­
der the connector for removal. The connector is
snapped onto the sensor. It is not equipped with a
lock type tab.
(2) Test the resistance of the sensor with a high in­
put impedance (digital) volt-ohmmeter. The resis­
tance (as measured across the sensor terminals)
should be less than 1340 ohms with the engine
warm. Refer to the Sensor Resistance (OHMS)—En­
gine Coolant, Intake Air and Transmission Tempera­
ture Sensors resistance chart. Replace the sensor if it
is not within the range of resistance specified in the
chart.
(3) Test continuity of the wire harness. Do this be­
tween the powertrain control module (PCM) wire
harness connector terminal 2 and the sensor connec­
tor terminal. Also test continuity of wire harness ter­
minal 4 to the sensor connector terminal. Repair the
wire harness if an open circuit is indicated.