Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1871

P0605-INTERNAL CONTROL MODULE ROM

For a complete wiring diagram Refer to Section 8W

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AUTOMATIC TRANSMISSION NAG1 - ELECTRICAL DIAGNOSTICS

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Theory of Operation

The Transmission Control Module (TCM) performs various internal tests to verify proper controller operation. If the
TCM detects an error with the controllers Read Only Memory (ROM), the controller will enter Limp-in mode and
illuminate the MIL.

•

When Monitored:
Continuously with the ignition on.

•

Set Condition:
If the TCM detects an error with the controllers Read Only Memory (ROM).

Possible Causes

TRANSMISSION CONTROL MODULE

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

Diagnostic Test

1.

TRANSMISSION CONTROL MODULE

View repair

Repair

Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion,
damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems
are found, replace the TCM per the Service Information. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/TRANSMISSION CONTROL MODULE - DESCRIPTION)

Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

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AUTOMATIC TRANSMISSION NAG1 - ELECTRICAL DIAGNOSTICS

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P0613-INTERNAL TRANSMISSION PROCESSOR

For a complete wiring diagram Refer to Section 8W

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AUTOMATIC TRANSMISSION NAG1 - ELECTRICAL DIAGNOSTICS

LX

Theory of Operation

The Transmission Control Module (TCM) performs various internal tests to verify proper controller operation. If the
TCM detects an error with the controllers processor, the controller will enter Limp-in mode and illuminate the MIL.

•

When Monitored:
Continuously with the ignition on.

•

Set Condition:
If the TCM detects an error with the controllers processor.

Possible Causes

TRANSMISSION CONTROL MODULE

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

Diagnostic Test

1.

TRANSMISSION CONTROL MODULE

View repair

Repair

Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion,
damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems
are found, replace the TCM per the Service Information. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/TRANSMISSION CONTROL MODULE - DESCRIPTION)

Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

LX

AUTOMATIC TRANSMISSION NAG1 - ELECTRICAL DIAGNOSTICS

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