my Honda Pilot YF3 (2016-2022) is not shifting properly, what are the possible causes?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the negative battery terminal for safety.

2. Check Transmission Fluid

• Tools Needed: Dipstick tool, funnel.
• Remove the transmission dipstick and wipe clean.
• Reinsert the dipstick and remove to check fluid level.
• If low, add the correct type of transmission fluid (consult owner's manual for specifications).
• Inspect fluid for discoloration or burnt smell; if found, plan for fluid replacement.

3. Inspect Transmission Linkage

• Tools Needed: Socket set, pliers.
• Locate the transmission linkage under the vehicle.
• Inspect for loose connections or damaged components.
• Tighten any loose bolts and replace damaged parts as needed.

4. Test Transmission Control Module (TCM)

• Tools Needed: OBD-II scanner, multimeter.
• Use the OBD-II scanner to check for TCM-related fault codes.
• If codes are present, consult repair manual for specifics on troubleshooting TCM.
• Perform a continuity test on the TCM wiring using a multimeter to check for shorts.

5. Inspect Wiring Harness

• Tools Needed: Visual inspection tools (flashlight), multimeter.
• Carefully trace the wiring harness from the TCM to the transmission.
• Look for frayed wires or corrosion at connectors; repair any damaged wiring.

6. Transmission Fluid Replacement (if required)

• Tools Needed: Fluid pump, drain pan, socket set.
• Place a drain pan under the transmission and remove the drain plug.
• Allow fluid to fully drain, then replace the drain plug with new gasket.
• Use a fluid pump to refill the transmission with the correct type of fluid through the dipstick tube.