Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit/System Testing
- Ignition/Vehicle & All vehicle systems - Off
- Disconnect the electrical connector: X5 @ K40D Seat Memory Control Module - Driver
- Ignition - On / Vehicle - In Service Mode
- Test for less than 1 V between the test points:
- Control circuit terminal 4 & Ground
- Control circuit terminal 5 & Ground
- If 1 V or greater
Repair the short to voltage on the circuit.
- Go to next step: If less than 1 V
- Ignition/Vehicle & All vehicle systems - Off
- Test for 27 to 51 Ω between the test points:
- Control circuit terminal 4 & Ground
- Control circuit terminal 5 & Ground
- If less than 27 Ω
Replace the appropriate component: P45LR Seat Haptic Movement Motor - Driver Left Rear or P45RR Seat Haptic Movement Motor - Driver Right Rear
- If greater than 51 Ω
- Test or inspect for the following: Ground Connection - Clean & Secure
- If not correct
Repair as necessary
- Go to next step: If correct
- If not correct
- Replace the appropriate component: P45LR Seat Haptic Movement Motor - Driver Left Rear or P45RR Seat Haptic Movement Motor - Driver Right Rear
- Go to next step: If between 21 and 57 Ω
- Momentarily connect a 3 A fused jumper wire between the test points:
- Control circuit terminal 4 & B+
- Control circuit terminal 5 & B+
- Verify the component turns On and Off when connecting and disconnecting the jumper wire: P45LR Seat Haptic Movement Motor - Driver Left Rear or P45RR Seat Haptic Movement Motor - Driver Right Rear
- If the component does not turn On and Off
Replace the appropriate component: P45LR Seat Haptic Movement Motor - Driver Left Rear or P45RR Seat Haptic Movement Motor - Driver Right Rear
- Go to next step: If the component turns On and Off
- If the component does not turn On and Off
- Ignition/Vehicle & All vehicle systems - Off
- Connect the electrical connector at all components.
- Ignition - On / Vehicle - In Service Mode
- Perform the scan tool function: Driver Seat Cushion Left Rear Haptic Movement & Driver Seat Cushion Right Rear Haptic Movement - On and Off
Verify the component produces a vibration that can be heard and felt.
- If the component does not activate
Replace the appropriate component: K40D Seat Memory Control Module - Driver
- Go to next step: If the component activates
- If the component does not activate
- All OK.
It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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