Finding the right OBD2 scanner for your Nissan Patrol can be crucial for diagnosing and resolving engine issues. This guide explains how to manually extract and clear fault codes on your Nissan Patrol, and discusses the importance of using a reliable OBD2 scanner. We’ll explore the process of reading trouble codes without a scanner and provide a comprehensive fault code table for your reference.
Understanding Nissan Patrol Fault Codes
Your Nissan Patrol’s check engine light illuminates when the onboard diagnostics system detects a problem. These problems are recorded as Diagnostic Trouble Codes (DTCs), or fault codes. While you can manually extract these codes, a quality OBD2 scanner simplifies the process and offers additional diagnostic capabilities. Understanding these codes is the first step towards resolving any underlying mechanical issues.
Manually Reading Fault Codes on a Nissan Patrol
Before the widespread use of OBD2 scanners, mechanics relied on manual methods to extract fault codes. Here’s how you can do it on your Nissan Patrol:
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Enter Diagnostic Test Mode: Turn the ignition ON. Ensure the check engine light is illuminated. Bridge terminals 1 and 8 on the diagnostic connector located under the dashboard. The check engine light should extinguish, indicating Diagnostic Test Mode I.
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Initiate Diagnostic Test Mode II: Wait at least two seconds, then disconnect the bridge between terminals 1 and 8. This initiates Diagnostic Test Mode II, allowing you to read the fault codes.
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Read the Flashing Check Engine Light: The check engine light will flash in a specific sequence to indicate the fault codes. Each code is represented by two sets of flashes separated by a 2.1-second pause.
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The first set of flashes (0.6 seconds each) represents the first two digits of the code, followed by a 0.9-second pause.
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The second set of flashes (0.3 seconds each) represents the last two digits of the code.
For example, code 0102 (Mass Air Flow Sensor) would be one 0.6-second flash, a 0.9-second pause, then two 0.3-second flashes.
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Repeat or Stop Reading Codes: To stop reading codes or start again, turn the ignition OFF and wait at least ten seconds before repeating the procedure.
Clearing Fault Codes Manually
After diagnosing the issue and performing necessary repairs, you can manually clear the fault codes:
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Bridge Terminals and Ignition ON: With the ignition still ON, reconnect the wire bridging terminals 8 and 1.
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Remove Bridge: Wait at least two seconds, then remove the bridge. This should erase the stored codes. Disconnecting the battery for over 24 hours also clears the codes.
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Verify Code Clearance: Road test the vehicle and repeat the manual code reading process to ensure no fault codes remain.
Nissan Patrol Fault Code Table
This table provides a list of common Nissan Patrol fault codes and their potential meanings. Remember, this is not an exhaustive list, and further diagnostics may be necessary.
| Code | Description |
|---|---|
| 0102 | Mass Air Flow Sensor Circuit, Sensor or ECM failure |
| 0103 | Engine Coolant Temperature Sensor 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) |
| 0208 | Overheating Fault |
| … | … |
| 1408 | Nissan Anti Theft System |
Why Invest in the Best OBD2 Scanner for Nissan Patrol?
While manual extraction is possible, using a dedicated OBD2 scanner provides several advantages:
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Faster and Easier Code Retrieval: Quickly read and clear codes without the manual process.
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Live Data Monitoring: Observe real-time sensor data to pinpoint issues.
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Advanced Diagnostics: Access manufacturer-specific codes and perform more in-depth analysis.
Choosing the best OBD2 scanner for your Nissan Patrol allows for efficient troubleshooting and maintenance, saving you time and potentially costly repairs. Look for scanners that offer comprehensive Nissan compatibility and features that meet your diagnostic needs.
