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.
2006 Mercury Mariner 4WD V6-3.0L VIN 1FACTORY OEM SERVICE PROCEDURE
Tests HL: Dual-Injection Fuel Delivery System
PINPOINT TEST HL: DUAL-INJECTION FUEL DELIVERY SYSTEM
This pinpoint test is intended to diagnose the following:
^ fuel injector
^ harness circuits: INJ1 - INJ8, INJ1F - INJ8F, INJ1R - INJ8R and FSSW
^ fuel injector interface module (9F954)
^ powertrain control module (PCM) (12A650)
Reference:
PCM Connector
Reference:
HL1 - HL2:
HL3 - HL4:
HL5 - HL6:
HL7:
HL8:
HL9 - HL10:
HL11 - HL12:
HL13 - HL14:
HL15 - HL16:
HL17 - HL18:
HL19 - HL20:
HL21:
HL22 - HL23:
HL24 - HL25:
Factory Service Tools
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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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