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 MANUALSMERCURY2010MARINER HYBRID, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 268 (AUTOMATIC TRANSMISSION EXTERNAL CONTROLS)DIAGNOSIS AND TESTINGEXTERNAL CONTROLSSYMPTOM CHARTS

2010 Mercury Mariner Hybrid, AWD

Symptom Charts

2010 Mercury Mariner Hybrid, AWDSECTION Symptom Charts

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART - COLUMN SHIFT

Condition	Possible Sources	Action
The shift interlock system does not release/lock correctly	Circuit(s) Fuse F5 (10A) Shift lock actuator Brake pedal position (BPP) switch Lighting control module	GO to PINPOINT TEST A .
The shift control is out of correct gear relationship	Shift control component(s) Internal transmission component(s)	GO to PINPOINT TEST B .
The selector lever indicator does not correspond to the gear	Selector lever indicator adjustment	CHECK that the selector lever indicator adjustment is correct. REFER to SELECTOR LEVER INDICATOR ADJUSTMENT . ADJUST the selector lever indicator if necessary. TEST the system for normal operation. If the condition persists, GO to PINPOINT TEST B .
The control linkage is binding	Shift control component(s) Internal transmission component(s)	GO to PINPOINT TEST C .
The selector lever will not shift from range	Shift control component(s) Internal transmission component(s)	GO to PINPOINT TEST C .
The selector lever indicator does not illuminate	Instrument cluster	REFER to INSTRUMENT CLUSTER AND PANEL ILLUMINATION .
The transmission control (TC) switch does not operate correctly	TC switch not cycled during self-test Fuse F26 (10A) TC switch Circuit(s) Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST D .
The transmission control indicator lamp (TCIL) does not illuminate	Circuit(s) Instrument cluster PCM	REFER to INSTRUMENT CLUSTER .
The transmission control indicator lamp (TCIL) is illuminated continuously	Circuit(s) Instrument cluster PCM	REFER to INSTRUMENT CLUSTER .
Rattle, noise, buzz or other noise	Selector lever Steering column shrouds	INSPECT the selector lever and shrouds for damage and incorrect installation. REPAIR as necessary. REFER to SELECTOR LEVER - COLUMN SHIFT .
Water enters inside the vehicle	Selector lever cable rubber grommet	SECURE the grommet to the bulkhead.
Water enters inside the vehicle	Torn selector lever cable rubber grommet	INSTALL a new selector lever cable and bracket. REFER to SELECTOR LEVER CABLE AND BRACKET - COLUMN SHIFT .

SYMPTOM CHART - FLOOR SHIFT

Condition	Possible Sources	Action
The shift interlock system does not release/lock correctly	Circuit(s) Fuse(s): F5 (10A) F14 (10A) Shift lock actuator Brake pedal position (BPP) switch	GO to PINPOINT TEST E .
The shift control is out of correct gear relationship	Shift control component(s) Internal transmission component(s)	GO to PINPOINT TEST F .
The control linkage is binding	Shift control component(s) Internal transmission component(s)	GO to PINPOINT TEST G .
The selector lever will not shift from range	Shift control component(s) Internal transmission component(s)	GO to PINPOINT TEST G .
The transmission control (TC) switch does not operate correctly	TC switch not cycled during self-test Fuse F26 (10A) TC switch Circuit(s) Powertrain control module (PCM)	GO to PINPOINT TEST H .
The transmission control indicator lamp (TCIL) does not illuminate	Circuit(s) Instrument cluster PCM	REFER to INSTRUMENT CLUSTER .
The TCIL is illuminated continuously	Circuit(s) Instrument cluster PCM	REFER to INSTRUMENT CLUSTER .
Rattle, noise, buzz or other noise	Floor shift mechanism Selector lever cable Shift interlock cable Parking brake release vacuum harness Steering column shrouds	INSPECT the selector lever mechanism, selector lever cable, interlock cable, vacuum harness and shrouds for damage and incorrect installation. REPAIR as necessary.
Water enters inside the vehicle	Selector lever cable rubber grommet	SECURE the grommet to the bulkhead.
Water enters inside the vehicle	Torn selector lever cable rubber grommet	INSTALL a new selector lever cable and bracket. REFER to SELECTOR LEVER CABLE AND BRACKET - FLOOR SHIFT .

RENDER: 1.0x

NO RELATED

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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.