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For a complete wiring diagramRefer to Section 8W • When Monitored: T mode. • Set Condition: T switch state is not correctly sensed by the Electronic Shift Module (ESM). If the upshift switch signal is detected as active in a gear position other than drive or when both the upshift and Possible Causes AUTOSTICK SWITCH ELECTRONIC SHIFT MODULE Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - Theory of Operation The AutoStick T Switch is located at the end of the Shift Lever. The gear change is requested by pressing the Auto- Stick Enable button, then either selecting the Upshift or Downshift on the rocker switch. The ESM then transmits the Diagnostic Test 1. CHECK THE AUTOSTICK SWITCH AUTOSTICK SWITCH RESISTANCE VALUES (COLUMN SHIFT) NON SWITCHED STATE ENABLE DOWNSHIFT UPSHIFT 21.5k ohms ±1% 2.64k ohms ±1% 4.05k ohms ±1% 8.10k ohms ±1% Turn the ignition off to the lock position. Disconnect the AutoStick T harness connector. Measure the resistance between the AutoStick Switch MUX circuit and NOTE: Use the above chart to and compare your resistive read- Does the AutoStick Switch resistance readings match the Yes >> Using the schematics as a guide, check the Electronic Shift Module (ESM) terminals for corrosion, damage, or terminal Perform NAG1 TRANSMISSION VERIFICATION TEST. No >> Replace the AutoStick Switch (Shift Lever) per the Service Information. Perform NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/ 21 - 258 AUTOMATIC TRANSMISSION NAG1 - SHIFTER DIAGNOSTICS LX |