Operation - 5 Volt Supply - Pcm Output; Standard Procedure; Standard Procedure - Obtaining; Diagnostic Trouble Codes - Chrysler PT Cruiser Service & Repair Manual

8E - 10 ELECTRONIC CONTROL MODULES
POWERTRAIN CONTROL MODULE (Continued)

OPERATION - 5 VOLT SUPPLY - PCM OUTPUT

The PCM supplies 5 volts to the following sensors:
• A/C pressure transducer
• Ambient Temperature sensor
• Battery temperature
• Camshaft Position Sensor (NGC)
• Crankshaft Position Sensor (NGC)
• Electronic Throttle Control (1.6L)
• Engine coolant temperature sensor
• Inlet Air Temperature Sensor
• Knock sensor
• Linear EGR solenoid (if equipped)
• Manifold absolute pressure sensor
• Oil Pressure Switch
• Pedal Position Sensor (1.6L)
• Throttle position sensor
• Vehicle Speed Sensor

STANDARD PROCEDURE

STANDARD PROCEDURE - OBTAINING

DIAGNOSTIC TROUBLE CODES

BULB CHECK
Key on: Bulb illuminated until vehicle starts, as
long as all once per trip (readiness) monitors com-
pleted. If monitors have not been completed, then:
Key on: bulb check for about 5 to 8 seconds, lamp
then flashes if once per trip (readiness) monitors
have not been completed until vehicle is started,
then MIL is extinguished.
OBTAINING DTC'S USING DRB SCAN TOOL
(1) Connect the DRB scan tool to the data link
(diagnostic) connector. This connector is located in
the passenger compartment; at the lower edge of
instrument panel; near the steering column.
(2) Turn the ignition switch on and access the
"Read Fault" screen.
(3) Record all the DTC's and "freeze frame" infor-
mation shown on the DRB scan tool.
(4) To erase DTC's, use the "Erase Trouble Code"
data screen on the DRB scan tool. Do not erase any
DTC's until problems have been investigated
and repairs have been performed.
STANDARD PROCEDURE - PINION FACTOR
SETTING
NOTE: This procedure must be performed if the
PCM/TCM has been replaced with a NEW or
replacement unit. Failure to perform this procedure
will result in an inoperative or improperly calibrated
speedometer.
The vehicle speed readings for the speedometer are
taken from the output speed sensor. The PCM/TCM
must be calibrated to the different combinations of
equipment (final drive and tires) available. Pinion
Factor allows the technician to set the Powertrain/
Transmission Control Module initial setting so that
the speedometer readings will be correct. To properly
read and/or reset the Pinion Factor, it is necessary to
use a DRBIII scan tool.
(1) Plug the DRBIII scan tool into the diagnostic
connector located under the instrument panel.
(2) Select the Transmission menu.
(3) Select the Miscellaneous menu.
(4) Select Pinion Factor. Then follow the instruc-
tions on the DRBIII scan tool screen.
STANDARD PROCEDURE - QUICK LEARN
PROCEDURE
The quick learn procedure requires the use of the
DRBIII scan tool. This program allows the PCM/
TCM to recalibrate itself. This will provide the best
possible transaxle operation.
NOTE: The quick learn procedure should be per-
formed if any of the following procedures are per-
formed:
• Transaxle Assembly Replacement
• Powertrain/Transmission
Replacement
• Solenoid/Pressure Switch Assembly Replacement
• Clutch Plate and/or Seal Replacement
• Valve Body Replacement or Recondition
To perform the Quick Learn Procedure, the follow-
ing conditions must be met:
• The brakes must be applied
• The engine speed must be above 500 rpm
• The throttle angle (TPS) must be less than 3
degrees
• The
shift lever
prompted to shift to overdrive
• The shift lever position must stay in overdrive
after the Shift to Overdrive prompt until the
DRBIII indicates the procedure is complete
• The calculated oil temperature must be above
60° and below 200°
(1) Plug the DRBIII scan tool into the diagnostic
connector. The connector is located under the instru-
ment panel.
(2) Go to the Transmission screen.
(3) Go to the Miscellaneous screen.
(4) Select Quick Learn Procedure. Follow the
instructions of the DRBIII
Learn Procedure.
Control Module
position must stay
to perform the Quick
PT
until