Control Switch Mounting Nut Qty: 3 Tip: Disconnect the electrical connector. The scan tool displays On or Off. Refer to Circuit Testing and Wiring Repairs. Inspect the roller on the shift fork for wear. Does the switch flash the full 15 seconds? I was reading that I should be able to turn then shaft on the t-case with a pair of pliers freely.
Motor B High Side Driver This parameter displays On when battery voltage is applied to the Motor B Circuit. Refer to Rear Propeller Shaft Replacement. Refer to Transfer Case Fluid Replacement. The double row pinion gears face forward or down. Refer to Transfer Case Speed Sensor Replacement.
Loosely install the encoder motor bracket bolt 2. Position the alignment marks with an area on the planetary differential that can be reference for all gears. Install the lower center support bearing thrust washer. Inspect to ensure the thrust washers are installed. Test Description The numbers below refer to the step numbers on the diagnostic table. Tighten the encoder motor bracket bolt to 10 N.
Inspect the sealing surfaces 1 for damage. A Hummer always has been a well-engineered vehicle but of course even the best-engineered cars and trucks have to have replacement part maintenance or new replacement parts. Tighten: Tighten the drain plug and fill plug to 16 N. If the module wants to request motor position, a low side driver pulls the voltage low on the encoder signal return and the corresponding channel circuit indicating motor position. Remove the transfer case retaining bolts and washers. Install the shift cam and shaft assembly.
Using pry bars at each side of the case, remove the case from the locating pins. Rear Axle Lock Request This parameter displays On when the transfer case shift control module receives a rear axle lock request from the transfer case shift control switch or a scan tool. Inspect the input seal surface 4 for scoring or excessive wear. Review the Symptoms - Transfer Case and perform the necessary inspections. The transfer case shift control module constantly monitors this signal voltage to determine the condition of the mode switch circuit.
Fastener Tightening Specifications: Refer to Fastener Tightening Specifications. Replace the sun gears if they are faulty. When removing or installing the shift cam and shaft assembly, keep the shaft straight and do not tilt. Replace the worn or missing thrust washer. Refer to Transfer Case Disassemble and Transfer Case Assemble. Replace the planetary differential if any of the above conditions are found.
Diagnostic 1 System Check Go to Step 2 Vehicle 2 1. Remove the inner lockup hub. Diagnostic 1 System Check Go to Step 2 Vehicle 2 1. I am still showing 4Hi-lock light on. Since both trucks have mode switch trouble codes, it seems logical to start there. Did you complete the repair? Install the J 8614-01 to the front output shaft flange.
Refer to Transfer Case Disassemble and Transfer Case Assemble. Is the voltage reading within the specified value? Rear Axle Lock Indicator Light This parameter displays On when the transfer case shift control module requests the rear axle lock indicator On. Rear output type: slip yoke. Diagnostic 1 System Check Go to Step 2 Vehicle 2 1. Using the J 45278 , install the seal. Install the lockup mode shift collar assembly and lockup mode shift fork. It can determine this because each switch has a different resistor in series with the circuit.