Dodge Nitro. Manual - part 347

Courtesy of CHRYSLER LLC 

Turn the ignition off to the lock position. 

Disconnect the Shift Lever Assembly harness connector. 

Turn the ignition on. 

Measure the voltage of the (L51) Brake Switch Signal circuit. 

Is the voltage above 0.5 volts?  

Yes  

Repair the (L51) Brake Switch Signal for a short to voltage.  

Perform NAG1 TRANSMISSION VERIFICATION TEST.  

No  

Replace the Shift Lever Assembly per the Service Information.  

Perform NAG1 TRANSMISSION VERIFICATION TEST.  

P2775-AUTOSTICK UPSHIFT SWITCH CIRCUIT PERFORMANCE - ESM 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

When Monitored: 

Continuously with the ignition in the run position and the shift lever in AutoStick mode. 

Set Condition: 

When the expected switch state is not correctly sensed by the Shift Lever Assembly. If the upshift switch 
signal is detected as active in gear position other than drive or both upshift and downshift signals are 
active at the same time. 

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. See 
STANDARD PROCEDURE.  

The AutoStick Switch is integrated into the Shift Lever Assembly. The gear requested by the AutoStick 

NOTE:

Check connectors - Clean/repair as necessary.

Possible Causes 

SHIFT LEVER ASSEMBLY

 

2007 Dodge Nitro R/T 

2007 AUTOMATIC TRANSMISSION NAG1 - Shifter Diagnostics - Nitro

  

selection is then sent over the CAN C bus to the TCM to engage the requested gear. 

Diagnostic Test 

1) SHIFT LEVER ASSEMBLY 

View repair  

Repair  

Using the schematics as a guide, check the Shift Lever Assembly (SLA) Electronic Shift Module 
(ESM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power 
and ground circuits. If no problems are found, replace the Shift Lever Assembly per the Service 
Information. Refer to Shift Mechanism for the appropriate service procedures.  

Perform NAG1 TRANSMISSION VERIFICATION TEST.  

P2779-AUTOSTICK DOWNSHIFT SWITCH CIRCUIT PERFORMANCE - ESM 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

When Monitored: 

Continuously with the ignition in the run position and with the shift lever in AutoStick mode. 

Set Condition: 

When the expected switch state is not correctly sensed by the Shift Lever Assembly (SLA) Electronic 
Shift Module (ESM). If the upshift switch signal is detected as active in gear position other than drive or 
both upshift and downshift signals are active at the same time. 

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. See 
STANDARD PROCEDURE.  

The AutoStick Switch is integrated into the Shift Lever Assembly. The gear requested by the AutoStick 
selection is then sent over the CAN C bus from the Electronic Shift Module (ESM) to the TCM to engage the 
requested gear. 

Diagnostic Test 

1) SHIFT LEVER ASSEMBLY 

View repair  

Possible Causes 

SHIFT LEVER ASSEMBLY

 

2007 Dodge Nitro R/T 

2007 AUTOMATIC TRANSMISSION NAG1 - Shifter Diagnostics - Nitro

  

Repair  

Using the schematics as a guide, check the Shift Lever Assembly (SLA) Electronic Shift Module 
(ESM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power 
and ground circuits. If no problems are found, replace the Shift Lever Assembly per the Service 
Information.  

Perform NAG1 TRANSMISSION VERIFICATION TEST.  

U0002-CAN C BUS OFF PERFORMANCE - ESM 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

Some controllers communicate with other controllers over the CAN C BUS. The Electronic Shift Module 
(ESM) continuously monitors BUS activity and reads the messages it needs. The CAN C BUS is also used to 
communicate the MIL status to the Engine Controller. 

For CAN BUS diagnostic procedures. Refer to DIAGNOSIS AND TESTING .  

U0100-LOST COMMUNICATION WITH ECM/PCM - ESM 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

Some controllers communicate with other controllers over the CAN C BUS. The Electronic Shift Module 
(ESM) continuously monitors BUS activity and reads the messages it needs. The CAN C BUS is also used to 
communicate the MIL status to the Engine Controller. 

For CAN BUS diagnostic procedures. Refer to DIAGNOSIS AND TESTING .  

U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE - ESM 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

Some controllers communicate with other controllers over the CAN C BUS. The Electronic Shift Module 
(ESM) continuously monitors BUS activity and reads the messages it needs. The CAN C BUS is also used to 
communicate the MIL status to the Engine Controller. 

For CAN BUS diagnostic procedures. Refer to DIAGNOSIS AND TESTING .  

U0141-LOST COMMUNICATION WITH FRONT CONTROL MODULE - ESM 

For a complete wiring diagram refer to appropriate Wiring Diagram article. 

Some controllers communicate with other controllers over the CAN C BUS. The Electronic Shift Module 
(ESM) continuously monitors BUS activity and reads the messages it needs. The CAN C BUS is also used to 
communicate the MIL status to the Engine Controller. 

For CAN BUS diagnostic procedures. Refer to DIAGNOSIS AND TESTING . 

 

2007 Dodge Nitro R/T 

2007 AUTOMATIC TRANSMISSION NAG1 - Shifter Diagnostics - Nitro

  

STANDARD PROCEDURE 

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. 

6. With the scan tool, display the Transmission temperature. Start and run the engine until the Transmission 

temperature is above 43°C (110°F).  

7. If internal transmission components were repaired or replaced check the Transmission fluid and adjust if 

necessary. Refer to the Service Information for the proper Fluid Fill procedure. Refer to STANDARD 
PROCEDURE .  

8. If the TCM (EGS) is flashed or replaced, with the scan tool, perform an 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 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 Km/h (45 mph) with a constant throttle opening of 20 to 

25 degrees.  

3. With speeds below 40 Km/h (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.  

Did any DTCs set?  

Yes  

Refer to the identified category and perform the appropriate symptom(s). 

CAUTION: Apply the parking brake.

NOTE:

The Transmission Temperature can only be read while in Reverse or Drive.

 

2007 Dodge Nitro R/T 

2007 AUTOMATIC TRANSMISSION NAG1 - Shifter Diagnostics - Nitro