Chrysler PT Cruiser 2001 Service Manual Supplement page 2468

GENERAL INFORMATION
cause them. The following checks may assist you in
identifying a possible intermittent problem:
• Visually inspect related wire harness connectors.
Look for broken, bent, pushed out, or corroded
terminals.
• Visually inspect the related harnesses. Look for
chafed, pierced, or partially broken wire.
•
Refer to any Hotline Newsletters or technical
service bulletins that may apply.
• Use the DRBIII data recorder or co-pilot.
• Use the DRBIII PEP module lab scope.
3.3.3 RESET COUNTER
The reset counter counts the number of times the
vehicle has been started since codes were last set,
erased, or the battery was disconnected. The reset
counter will count up to 255 start counts.
The number of starts helps determine when the
SYMPTOM
HARD START
START AND STALL
HESITATION/SAG/
STUMBLE
DIAGNOSTIC TEST
CHECKING SECONDARY IGNITION SYSTEM
CHECKING ENGINE VACUUM
CHECKING THE FUEL DELIVERY
CHECKING COOLANT SENSOR CALIBRATION
CHECKING THROTTLE POSITION SENSOR CALIBRATION
CHECKING MAP SENSOR CALIBRATION
CHECKING THE MINIMUM IDLE AIR FLOW
CHECKING IDLE AIR CONTROL MOTOR OPERATION
CHECKING ENGINE MECHANICAL SYSTEMS
CHECKING EVAP EMISSION SYSTEM
CHECKING EGR SYSTEM (IF EQUIPPED)
CHECKING IAT SENSOR
CHECKING SECONDARY IGNITION SYSTEM
CHECKING PCM POWER AND GND CKT
CHECKING THE FUEL DELIVERY
CHECKING COOLANT SENSOR CALIBRATION
CHECKING THROTTLE POSITION SENSOR CALIBRATION
CHECKING MAP SENSOR CALIBRATION
CHECKING THE MINIMUM IDLE AIR FLOW
CHECKING IDLE AIR CONTROL MOTOR OPERATION
CHECKING SECONDARY IGNITION SYSTEM
CHECKING PCM POWER AND GND CKT
CHECKING ENGINE VACUUM
CHECKING THE FUEL DELIVERY
CHECKING COOLANT SENSOR CALIBRATION
CHECKING THROTTLE POSITION SENSOR CALIBRATION
CHECKING MAP SENSOR CALIBRATION
CHECKING THE MINIMUM IDLE AIR FLOW
CHECKING IDLE AIR CONTROL MOTOR OPERATION
CHECKING ENGINE MECHANICAL SYSTEMS
CHECKING EVAP EMISSION SYSTEM
CHECKING EGR SYSTEM (IF EQUIPPED)
CHECKING IAT SENSOR
CHECKING PNP SWITCH
trouble code actually happened. This is recorded by
the PCM and can be viewed on the DRBIII
STARTS since set.
When there are no trouble codes stored in mem-
ory, the DRBIII will display "NO DTC'S Detected"
and the reset counter will show "STARTS since
clear = XXX."
3.3.4 HANDLING NO TROUBLE CODE
PROBLEMS
Symptom checks cannot be used properly unless
the driveability problem characteristic actually
happens while the vehicle is being tested.
Select the symptom that most accurately de-
scribes the vehicle's driveability problem and then
perform the test routine that pertains to this symp-
tom. Perform each routine test in sequence until the
problem is found. For definitions, see Section 6.0
Glossary of Terms.
8
as