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.
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HOMESERVICE MANUALSLINCOLN2007NAVIGATOR L RWDREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSAXLE/TRANSMISSIONDIAGNOSTIC TESTSDIAGNOSTICSON-BOARD DIAGNOSTICS WITH SCAN TOOL
2007 Lincoln Navigator L RWD
On-Board Diagnostics With Scan Tool
2007 Lincoln Navigator L RWDSECTION On-Board Diagnostics With Scan Tool
NOTE:
For detailed instruction and other diagnostic methods using the scan tool, refer to the scan tool tester manual and the Introduction - Gasoline Engines
article. These quick tests should be used to diagnose the PCM and should be carried out in order.
- Quick Test 1.0 - Visual Inspection
- Quick Test 2.0 - Set Up
- Quick Test 3.0 - Key On, Engine Off (KOEO)
- Quick Test 4.0 - Continuous Memory
- Quick Test 5.0 - Key On, Engine Running (KOER)
- Special Test Mode
- Wiggle Test
- Output Test Mode
- PCM Reset Mode
- Clearing DTCs
- OBD II Drive Cycle
- Other Scan Tool Features
For information on other diagnostic testing features using the scan tool, refer to the Introduction - Gasoline Engines article. Other diagnostic methods include the following:
- PID Access Mode
- Freeze Frame Data Access Mode
- Oxygen Sensor Monitor Mode
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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.