Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1870

P0602-CONTROL MODULE PROGRAMMING ERROR/NOT PROGRAMMED

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 that the variables that dictate the vehicle application are not present, the controller will enter Limp-in
mode and illuminate the MIL.

•

When Monitored:
Continuously with the ignition on.

•

Set Condition:
If the TCM detects that the variables that dictate the vehicle application are not present.

Possible Causes

CONTROLLER NOT CODED

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.

CHECK IF TCM IS FLASHABLE

NOTE: Controller is programmed with generic software and will not allow the correct vehicle Powertrain
management.
With the scan tool, record the vehicles controller part number.

Select Use Controller Part Number under the Flash Tab.

Flash the controller with the correct software.

Were you able to update (flash) the controller successfully?

Yes

>> Test Complete.

Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.

No

>> 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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P0604-INTERNAL CONTROL MODULE RAM

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 Random Access Memory (RAM), 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 Random Access Memory (RAM).

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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