Chrysler Concorde 2004 Service Manual page 1285

Symptom:
P0888-RELAY OUTPUT ALWAYS OFF
When Monitored and Set Condition:
P0888-RELAY OUTPUT ALWAYS OFF
When Monitored: Continuously
Set Condition: This DTC is set when less than 3 volts are present at the Transmission
Control Relay output circuits at the Transmission Control Module (TCM) when the TCM
is energizing the relay. Note: Due to the integration of the Powertrain and Transmission
Control Modules, the transmission part of the PCM has its own specific power and ground
circuits.
FUSED B+ CIRCUIT OPEN
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
TRANSMISSION CONTROL RELAY CONTROL CIRCUIT OPEN
TRANSMISSION CONTROL RELAY GROUND CIRCUIT OPEN
TRANSMISSION CONTROL RELAY STUCK OPEN
TRANSMISSION CONTROL RELAY CONTROL CIRCUIT SHORT TO GROUND
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT SHORT TO GROUND
POWERTRAIN CONTROL MODULE
INTERMITTENT WIRING AND CONNECTORS
POSSIBLE CAUSES
125
TRANSMISSION - NGC