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.
2011 Suzuki Grand Vitara BaseFACTORY OEM SERVICE PROCEDURE
DTC Troubleshooting
P0602 DIAGNOSIS PROCEDURE
| Step | Action | YES | NO |
|---|---|---|---|
| 1 | DTC recheck
Is DTC P0602 still detected? |
Go to Step 2. | Check for intermittent trouble, see INTERMITTENT AND POOR CONNECTION INSPECTION . |
| 2 | ECM reprogramming check Was reprogramming of ECM executed? |
Execute reprogramming of ECM correctly once again. | Go to Step 3. |
| 3 | ECM power and ground circuit check
Is it in good condition? |
Repair or replace defective wire harness. | Substitute a known-good ECM and recheck. |
Factory Service Tools
Use the Manual With the Right Hardware
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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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