Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1986
P0604-INTERNAL CONTROL MODULE RAM
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
One time after the ignition key is turned to the run position.
•
Set Condition:
The read value does not match the written value in any RAM location.
Possible Causes
PCM - INTERNAL ERROR
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
Theory of Operation
After the controller is reset, the microprocessor checks the integrity of each RAM location by writing to it and read-
ing back from it. The read value should be the same as the written value. MIL on after 10 seconds of vehicle oper-
ation and transmission will be placed in limp-in.
Diagnostic Test
1.
PCM - INTERNAL ERROR
View repair.
Repair
Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion,
damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems
are found, replace the PCM per the Service Information. With the scan tool PERFORM QUICK LEARN,
then program Pinion Factor in the Front Control Module. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/POWERTRAIN CONTROL MODULE - REMOVAL)
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
21 - 478
AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS
LX
P0605-INTERNAL CONTROL MODULE ROM
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
One time after the ignition key is turned to the run position.
•
Set Condition:
If the ROM checksum does not match a known constant.
Possible Causes
PCM - INTERNAL ERROR
Always perform the 42RLE Pre-Diagnostic Troubleshooting Procedure before proceeding. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
Theory of Operation
After the controller is reset, the microprocessor checks the integrity of the program memory (ROM). A checksum is
calculated by adding all used bytes in the program memory. The sum should be the same as a known constant
stored in memory. MIL on after 10 seconds of vehicle operation and transmission will be placed in limp-in.
Diagnostic Test
1.
PCM - INTERNAL ERROR
View repair.
Repair
Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion,
damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems
are found, replace the PCM per the Service Information. With the scan tool PERFORM QUICK LEARN,
then program Pinion Factor in the Front Control Module. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/POWERTRAIN CONTROL MODULE - REMOVAL)
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
LX
AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS
21 - 479
P0613-INTERNAL TRANSMISSION PROCESSOR
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
After the ignition key is turned to the run position and 60 seconds thereafter.
•
Set Condition:
Either of the following conditions occur 3 times in less than 590 milliseconds: The watchdog line remains high
after the watchdog test or the transmission relay coil is energized and remains on after the watchdog delay
expires.
Possible Causes
PCM - INTERNAL ERROR
Always perform the 42RLE Pre-Diagnostic Troubleshooting Procedure before proceeding. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
Theory of Operation
The internal watchdog is a separate hardware circuit which continuously monitors the microprocessor. To make sure
the transmission is operating properly, the watchdog must receive a signal from the microprocessor within a specific
time window. MIL on after 10 seconds of vehicle operation and transmission will be placed in limp-in.
Diagnostic Test
1.
PCM - INTERNAL ERROR
View repair.
Repair
Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion,
damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems
are found, replace the PCM per the Service Information. With the scan tool PERFORM QUICK LEARN,
then program Pinion Factor in the Front Control Module. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/POWERTRAIN CONTROL MODULE - REMOVAL)
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
21 - 480
AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS
LX
P0706-TRANSMISSION RANGE SENSOR RATIONALITY
For a complete wiring diagram Refer to Section 8W.
LX
AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS
21 - 481
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