Finding the right OBD2 scanner for your Nissan Patrol can be crucial for diagnosing and resolving engine issues. This guide provides a comprehensive overview of how to manually extract and clear fault codes on your Nissan Patrol, along with a detailed fault code table. Understanding these codes can help you pinpoint problems and potentially save on costly mechanic visits.
Manually Reading Fault Codes on a Nissan Patrol
Before investing in an OBD2 scanner, you can manually retrieve diagnostic trouble codes (DTCs) from your Nissan Patrol. This method involves utilizing the vehicle’s Check Engine Lamp (CEL) and the diagnostic connector.
Steps for Manual Extraction:
- Ignition ON: Turn the ignition to the ON position without starting the engine.
- CEL Confirmation: Verify that the Check Engine Lamp illuminates. This indicates that the system is in Diagnostic Test Mode I.
- Bridge Terminals: Locate the diagnostic connector under the dashboard. Using a jumper wire, bridge terminals 1 (CHK) and 8 (IGN).
- CEL Extinguishment: Confirm that the Check Engine Lamp turns off. This signifies a successful transition to Diagnostic Test Mode II.
- Disconnect Bridge: Wait at least two seconds, then remove the jumper wire connecting terminals 1 and 8.
- Read Flashing Codes: Observe the Check Engine Lamp. It will flash a series of codes, indicating specific faults.
Understanding the Flashing Codes:
Each code is represented by two sets of flashes separated by a 2.1-second pause. Within each set, there’s a series of 0.6-second flashes, a 0.9-second pause, and another series of 0.3-second flashes. The first set represents the first two digits of the code, while the second set represents the last two digits.
Example:
- Code 0102 (Mass Air Flow Sensor): One 0.6-second flash, a 0.9-second pause, two 0.3-second flashes (first set). Then, a 2.1-second pause followed by one 0.6-second flash, a 0.9-second pause, and two 0.3-second flashes (second set).
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To stop retrieving codes or to re-read them, turn off the ignition and wait at least ten seconds before repeating the procedure.
Clearing Fault Codes Manually
After reading the codes, you can clear them manually using the same diagnostic connector.
Steps for Clearing Codes:
- Reconnect Bridge: With the ignition still ON, reconnect the jumper wire between terminals 8 (IGN) and 1 (CHK).
- Remove Bridge: Wait at least two seconds, then remove the jumper wire. Stored codes should now be erased. Disconnecting the battery for over 24 hours will also erase fault codes.
- Road Test: After clearing the codes, road test your Nissan Patrol to ensure no fault codes reappear.
Nissan Patrol Fault Code Table
| Code | Description |
|---|---|
| 0102 | Mass Air Flow Sensor Circuit, Sensor or ECM failure |
| 0103 | Engine Coolant Temperature Sensor (excessively high or low voltage at ECM) Circuit, Sensor or ECM failure |
| 0104 | Vehicle Speed Sensor (signal not sent when vehicle is in motion) |
| 0203 | Accelerator Position Switch (incorrect signal sent to ECM) Accelerator Position Switch fault or ECM failure |
| 0208 | Overheating Fault Cooling Fan system failure, Engine coolant re-filling procedure not followed, Cooling system faulty, Engine lubrication problem |
This table provides a partial list of common Nissan Patrol fault codes. For a complete list, consult your vehicle’s service manual.
While manual code extraction is possible, a dedicated OBD2 scanner offers more features and ease of use, especially for complex diagnostics. Consider investing in the Best Obd2 Scanner For Nissan Patrol to efficiently diagnose and resolve vehicle issues.
