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.
Test Procedure
-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK
Start diagnosis
-- Connect the scan tool.
-- Perform a road test with a vehicle speed greater than 5 Km/h.
-- Using the scan tool, Check the vehicle speed:
| Diagnostic Text | Specified Value |
|---|---|
| Vehicle Speed | Approx. Vehicle Speed |
-- Compare the vehicle speed on the scan tool to the Speedometer -G21-.
Specified value: a difference of no greater than 10%.
If the specified value was not obtained or no speed was displayed:
-- For models with ABS, check the wheel speed signal in the ABS controller with a scan tool. If the signal is not present or a code is set, refer to the ABS diagnostics in the Repair Information.
-- On other models check the wiring from the Engine Control Module -J623- to the Instrument Cluster Control Module -J285- for an open circuit, Short to Battery (+), or to Ground.
-- Check the wiring connection for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.