Chrysler 300M 2002 Service Manual page 2442

SYMPTOM
RUNS ROUGH/UNSTABLE/
ERRATIC IDLE
POOR FUEL ECONOMY
3.4 USING THE DRBIII
Refer to the DRBIII user's guide for instructions
and assistance with reading DTC's, erasing DTC's,
and other DRBIII functions.
3.5 DRBIII ERROR MESSAGES AND
BLANK SCREEN
Under normal operation, the DRBIII will dis-
play one of only two error messages:
– User-Requested
Requested COLD Boot
If the DRBIII should display any other error
message, record the entire display and call the Star
Center for information and assistance. This is a
sample of such an error message display:
ver: 2.14
date: 26 Jul93
file: key_itf.cc
date: Jul 26 1993
line: 548
err: 0x1
User-Requested COLD Boot
Press MORE to switch between this display
and the application screen.
Press F4 when done noting information.
3.5.1 DRBIII DOES NOT POWER UP
If the LED's do not light or no sound is emitted at
start up, check for loose cable connections or a bad
cable. Check the vehicle battery voltage (data link
connector cavity 16). A minimum of 11 volts is
required to adequately power the DRBIII .
If all connections are proper between the
DRBIII and the vehicle or other devices, and the
DIAGNOSTIC TEST
CHECKING PCM POWER AND GND CKT
CHECKING THE FUEL PRESSURE
CHECKING ECT SENSOR
CHECKING THROTTLE POSITION SENSOR
CHECKING MAP SENSOR
CHECKING IDLE AIR CONTROL MOTOR OPERATION
CHECKING IAT SENSOR
CHECKING PCM POWER AND GND CKT
CHECKING THE FUEL PRESSURE
CHECKING ECT SENSOR
CHECKING THROTTLE POSITION SENSOR
CHECKING MAP SENSOR
CHECKING IDLE AIR CONTROL MOTOR OPERATION
CHECKING IAT SENSOR
WARM Boot or User-
GENERAL INFORMATION
vehicle battery is fully charged, and inoperative
DRBIII may be the result of faulty cable or vehicle
wiring.
3.5.2 DISPLAY IS NOT VISIBLE
Low temperatures will affect the visibility of the
display. Adjust the contrast to compensate for this
condition
4.0 DISCLAIMERS, SAFETY,
WARNINGS
4.1 DISCLAIMERS
All information, illustrations, and specifications
contained in this manual are based on the latest
information available at the time of publication.
The right is reserved to make changes at any time
without notice.
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