Diagnostic Test

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 in accordance with the Service Information. Refer to Transmission and Transfer Case/Automatic - NAG1/SHIFTER, Transmission - Removal .
• Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .