Operation - Sensor Return - Pcm Input; Operation - Data Bus Communication Receive - Pcm Input; Operation - Ignition Sense - Pcm Input; Pcm Replacement - Chrysler Sebring 2004 Service Manual

JR
POWERTRAIN CONTROL MODULE (Continued)
Schedule
Extreme Cold
Cold
Warm
Hot
Overheat
Super Overheat

OPERATION - SENSOR RETURN - PCM INPUT

The sensor return circuit provides a low electrical
noise ground reference for all of the systems sensors.
The sensor return circuit connects to internal ground
circuits within the Powertrain Control Module
(PCM).
OPERATION - DATA BUS COMMUNICATION
RECEIVE - PCM INPUT
The PCM uses the SCI communication bus to pre-
form engine diagnostics and flash operations. The
transmission side of the PCM uses the SCI commu-
nication bus to flash new software. However, diagnos-
Condition
Oil temperature at start-up below
-16° F
Oil temperature at start-up above
-12° F and below 36° F
Oil temperature at start-up above
36° F and below 80 degree F
Oil temperature at start-up above
80° F
Oil temperature above 240° F or
engine coolant temperature above
244° F
Oil temperature above 260° F
tics is performed via the vehicles J1850 bus for the
transmission side of the PCM.

OPERATION - IGNITION SENSE - PCM INPUT

The ignition sense input informs the Powertrain
Control Module (PCM) that the ignition switch is in
the crank or run position.

PCM REPLACEMENT

DESCRIPTION
USE THE DRB SCAN TOOL TO REPROGRAM
THE NEW PCM WITH THE VEHICLES ORIGI-
ELECTRONIC CONTROL MODULES
Expected Operation
Park, Reverse, Neutral and 2nd
gear only (prevents shifting which
may fail a clutch with frequent
shifts)
– Delayed 2-3 upshift
(approximately 22-31 mph)
– Delayed 3-4 upshift (45-53 mph)
– Early 4-3 costdown shift
(approximately 30 mph)
– Early 3-2 coastdown shift
(approximately 17 mph)
– High speed 4-2, 3-2, 2-1 kickdown
shifts are prevented
– No EMCC
– Normal operation (upshift,
kickdowns, and coastdowns)
– No EMCC
– Normal operation (upshift,
kickdowns, and coastdowns)
– Full EMCC, no PEMCC except to
engage FEMCC (except at closed
throttle at speeds above 70-83 mph)
– Delayed 2-3 upshift (25-32 mph)
– Delayed 3-4 upshift (41-48 mph)
– 3rd gear FEMCC from 30-48 mph
– 3rd gear PEMCC from 27-31 mph
– All Overheat shift schedule
features apply
– 2nd gear PEMCC above 22 mph
– Above 22 mph the torque
converter will not unlock unless the
throttle is closed or if a wide open
throttle 2nd PEMCC to 1 kickdown
is made
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