Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1921
NAG1 PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE
For a complete wiring diagram Refer to Section 8W
Perform the following pre-diagnostic troubleshooting procedures prior to performing any diagnostic test.
Low fluid level can be the cause of many transmission problems. If the fluid level is low, locate and repair the leak
then check and adjust the fluid level in accordance with the Service Information.
Always perform diagnostics with a fully charged battery to avoid false symptoms.
1. With the scan tool, read the engine DTCs. Check and repair all engine DTCs prior to performing transmission
symptom diagnostic procedures.
2. With the scan tool, read and record all Transmission DTCs.
NOTE: If the TCM detects and stores a DTC, the TCM also stores the vehicles operating conditions under
which the DTC originally set and is located in scan tool under Environmental Data. Before erasing any
stored DTCs, it is recommended to record any available data to assist in duplicating the conditions in which
the DTC originally set.
3. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Clean and repair as neces-
sary.
4. Most DTCs set on start up but some must be set by driving the vehicle such that all diagnostic monitors have
run.
5. Verify flash level of transmission controller. Some problems are corrected by software upgrades to the transmis-
sion controller. Verify that no variant DTCs are present. If variant DTCs are present, perform their respective test
first.
6. If the TCM (EGS) is flashed, perform a EGS initialization with the scan tool to relearn variant coding.
7. Check for any Service Information Tune-ups or Service Bulletins that may apply.
1.
Did any of the above procedures repair the vehicle?
Yes
>> Testing is complete.
Perform NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - NAG1 - STANDARD PROCEDURE)
No
>> Refer to the identified category and perform the appropriate symptom(s).
(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - DIAGNOSIS AND TESTING)
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AUTOMATIC TRANSMISSION NAG1 - ELECTRICAL DIAGNOSTICS
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NAG1 TRANSMISSION VERIFICATION TEST
To validate that the repair(s) fixed the vehicle, perform the following steps.
1. Reconnect any disconnected components.
2. Connect the scan tool to the Data Link Connector.
3. With the scan tool, erase ABS DTCs.
4. With the scan tool, erase PCM DTCs.
5. With the scan tool, erase TCM DTCs.
CAUTION: Apply the parking brake.
NOTE: The Transmission Temperature can only be read while in Reverse or Drive.
6. With the scan tool, display the Transmission temperature. Start and run the engine until the Transmission tem-
perature is above 43° C (110° F).
7. Check the Transmission fluid and adjust if necessary. Refer to the Service Information for the proper Fluid Fill
procedure. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1/FILTER - STANDARD PROCE-
DURE)
8. If the TCM (EGS) is flashed or replaced, with the scan tool, perform a EGS initialization to relearn variant coding.
9. If internal transmission repairs are performed or replacement of the Transmission Control Module, perform a
TCM ADAPTATION procedure. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMIS-
SION CONTROL MODULE - STANDARD PROCEDURE)
10. After performing the above procedures, perform the Road Test Procedure.
ROAD TEST PROCEDURE
1. Road test the vehicle. Make fifteen to twenty 1-2, 2-3, 3-4, and 4-5 upshifts.
2. Perform these shifts from a standing start to 72 Kmh (45 mph) with a constant throttle opening of 20 to 25
degrees.
3. With speeds below 40 Kmh (25 mph), make five to eight wide open throttle kickdowns to 1st gear. Allow at least
5 seconds each in 2nd and 3rd gear between each kickdown.
4. With the scan tool, read DTCs.
1.
Did any DTCs set?
Yes
>> Refer to the identified category and perform the appropriate symptom(s).
No
>> Testing is complete.
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AUTOMATIC TRANSMISSION NAG1 - ELECTRICAL DIAGNOSTICS
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AUTOMATIC TRANSMISSION NAG1 - SHIFTER
DIAGNOSTICS
TABLE OF CONTENTS
page
page
AUTOMATIC TRANSMISSION NAG1 - SHIFTER
DIAGNOSTICS
DIAGNOSIS AND TESTING
ESM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
P0930-BTSI CONTROL CIRCUIT LOW - ESM . 226
P0931-BTSI CONTROL CIRCUIT HIGH -
ESM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
P2775-AUTOSTICK UPSHIFT SWITCH
CIRCUIT PERFORMANCE - ESM. . . . . . . . . . . 232
P2779-AUTOSTICK DOWNSHIFT SWITCH
CIRCUIT PERFORMANCE - ESM. . . . . . . . . . . 233
U0002-CAN C BUS OFF PERFORMANCE -
ESM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
ECM/PCM - ESM . . . . . . . . . . . . . . . . . . . . . . . . . 236
ANTI-LOCK BRAKE MODULE - ESM. . . . . . . . 238
FRONT CONTROL MODULE - ESM . . . . . . . . 240
P0562-BATTERY VOLTAGE LOW - ESM
(COLUMN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
P0563-BATTERY VOLTAGE HIGH - ESM
(COLUMN SHIFT) . . . . . . . . . . . . . . . . . . . . . . . . . 245
P0607-ECU INTERNAL PERFORMANCE -
ESM (COLUMN SHIFT) . . . . . . . . . . . . . . . . . . . . 247
P0930-BTSI CONTROL CIRCUIT LOW - ESM
(COLUMN SHIFT) . . . . . . . . . . . . . . . . . . . . . . . . . 249
P0931-BTSI CONTROL CIRCUIT HIGH -
ESM (COLUMN SHIFT) . . . . . . . . . . . . . . . . . . . . 252
P2775-AUTOSTICK UPSHIFT SWITCH
CIRCUIT PERFORMANCE - ESM
(COLUMN SHIFT) . . . . . . . . . . . . . . . . . . . . . . . . . 255
P2779-AUTOSTICK DOWNSHIFT SWITCH
CIRCUIT PERFORMANCE - ESM
(COLUMN SHIFT) . . . . . . . . . . . . . . . . . . . . . . . . . 257
U0002-CAN C BUS OFF PERFORMANCE -
ESM (COLUMN SHIFT) . . . . . . . . . . . . . . . . . . . . 259
ECM/PCM - ESM (COLUMN SHIFT) . . . . . . . . 259
ANTI-LOCK BRAKE MODULE - ESM
(COLUMN SHIFT) . . . . . . . . . . . . . . . . . . . . . . . . . 259
FRONT CONTROL MODULE - ESM
(COLUMN SHIFT) . . . . . . . . . . . . . . . . . . . . . . . . . 259
TROUBLESHOOTING PROCEDURE. . . . . . . . 260
NAG1 TRANSMISSION VERIFICATION TEST . 261
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AUTOMATIC TRANSMISSION NAG1 - SHIFTER DIAGNOSTICS
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AUTOMATIC TRANSMISSION NAG1 - SHIFTER DIAGNOSTICS
DIAGNOSIS AND TESTING
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AUTOMATIC TRANSMISSION NAG1 - SHIFTER DIAGNOSTICS
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