The P0696: Fan 3 Control Circuit High code indicates that the control module has detected a higher-than-expected voltage in the control circuit for Fan 3. This can prevent the fan from functioning properly, leading to inadequate cooling and potential engine overheating. High voltage can be caused by a faulty fan, wiring issues, or a malfunction in the control circuit.
P0696 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0696: Fan 3 Control Circuit High |
| Is it serious? | Yes, as it can lead to improper fan operation and possible engine overheating. |
| Possible causes | – High voltage in Fan 3 control circuit – Faulty fan – Wiring issue |
| How to diagnose? | – Test fan 3 control circuit for voltage – Inspect wiring and connectors – Replace fan if necessary |
P0696 Meaning
The P0696 code indicates that the voltage in the control circuit for Fan 3 is higher than expected. This high voltage may cause Fan 3 to malfunction, leading to insufficient cooling of the engine and potential overheating.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional codes related to the cooling system or Fan 3 that could provide more context about the issue. | OBD-II Scanner |
| Test the Fan 3 Control Circuit for Voltage | Use a multimeter to measure the voltage in the Fan 3 control circuit. Compare the readings with manufacturer specifications to determine if the voltage is too high. | Multimeter |
| Inspect Wiring and Connectors | Inspect the wiring and connectors leading to Fan 3 for any signs of damage, corrosion, or loose connections that could cause high voltage. | Flashlight, Multimeter |
| Test the Fan for Functionality | Test Fan 3 to ensure it is operating correctly and not contributing to the high voltage issue. If the fan is faulty, replace it. | Diagnostic Tool, Multimeter |
| Replace the Fan if Necessary | If Fan 3 is malfunctioning or damaged, replace it to restore proper engine cooling and prevent overheating. | Replacement Fan, Tools |
| Clear the Code and Test | After repairs, clear the code using an OBD-II scanner and test the vehicle to ensure that Fan 3 is functioning correctly and that the code does not return. | OBD-II Scanner, Vehicle Manual |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko