Chrysler 1997 Stratus Convertible RHD Service Manual page 900

TER- MINAL 1
14 - 46 FUEL SYSTEM
DIAGNOSIS AND TESTING (Continued)
connector terminal 43 and the sensor harness con-
nector. Refer to Group 8W, Wiring diagrams for cir-
cuit information. If the resistance is greater than 1
ohm, repair the wire harness as necessary.
HEATED OXYGEN SENSOR
Use an ohmmeter to test the heating element of
the oxygen sensors. Disconnect the electrical connec-
tor from each oxygen sensor. The white wires in the
sensor connector are the power and ground circuits
for the heater. Connect the ohmmeter test leads to
terminals of the white wires in the heated oxygen
sensor connector. Replace the heated oxygen sensor if
the resistance is not between 4 and 7 ohms.
IDLE AIR CONTROL (IAC) MOTOR TEST
To preform a complete test of IAC motor and its
circuitry, refer to DRB scan tool and the appropriate
Powertrain Diagnostics Procedures manual.
KNOCK SENSOR
The knock sensor can be tested with a digital volt-
meter. Sensor output should be between 80 mV and 4
volts with the engine running between 576 and 2208
rpm. If the output falls outside of this range a DTC
will be set.
MANIFOLD ABSOLUTE PRESSURE SENSOR
To perform a complete test of the MAP sensor and
its circuitry, refer to the DRB scan tool and appropri-
ate Powertrain Diagnostics Procedures manual. To
test the MAP sensor only, refer to the following:
(1) Test the MAP sensor output voltage at the
MAP sensor connector between terminals 1 and 3
(Fig. 33). With the ignition switch ON and the engine
not running, output voltage should be 4 to 5 volts.
The voltage should drop to 1.5 to 2.1 volts with a hot,
neutral idle speed condition. If OK, go to next step. If
not OK, go to step 3.
Fig. 59 MAP Sensor Connector
TER- MINAL 3 TER- MINAL 2
(2) Test PCM terminal 29 for the same voltage
described in the previous step to verify wire harness
condition. Repair as required.
(3) Test the MAP sensor ground circuit at sensor
connector terminal 1 and PCM terminal 51. If OK, go
to next step. If not OK, repair as required.
(4) Test MAP sensor supply voltage between sen-
sor connector terminals 2 and 1 with the key ON.
The voltage should be approximately 5 volts ( .5V).
Five volts ( .5V) should also be at terminal 43 of the
PCM. If OK, replace MAP sensor. If not OK, repair or
replace the wire harness as required.
THROTTLE POSITION SENSOR
To perform a complete test of the this sensor and its
circuitry, refer to the DRB scan tool and appropriate
Powertrain Diagnostics Procedures manual. To test the
throttle position sensor only, refer to the following:
The Throttle Position Sensor (TPS) can be tested
with a digital voltmeter. The center terminal of the
sensor is the output terminal.
With the ignition switch in the ON position, check
the output voltage at the center terminal wire of the
connector. Check the output voltage at idle and at
wide-open-throttle (WOT). At idle, TPS output volt-
age should be greater than 0.6 volts. At wide open
throttle, TPS output voltage should be less than 4.5
volts. The output voltage should gradually increase
as the throttle plate moves slowly from idle to WOT.
Check for spread terminals at the sensor and PCM
connections before replacing the TPS.
THROTTLE BODY MINIMUM AIR FLOW
(1) Turn ignition key to Off.
(2) Disconnect the PCV valve hose from the intake
manifold nipple. Cap the PCV vacuum nipple.
(3) Disconnect purge hose from the nipple on the
throttle body (Fig. 60) or (Fig. 61).
Fig. 60 Purge Hose—2.4L Engines
JX