PINPOINT TEST DG: Knock Sensor (KS): Introduction

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

knock sensors KS1, KS2 (12A699)
harness circuits: KS1+, KS1-, KS2+, and KS2-
powertrain control module (PCM) (12A650)

Fig 1: Knock Sensor 1 (KS1) Connector - A

Courtesy of FORD MOTOR CO.

Fig 2: Knock Sensor 1 (KS1) Connector - B

Courtesy of FORD MOTOR CO.

Fig 3: Knock Sensor 1 (KS1) Connector - C

Courtesy of FORD MOTOR CO.

Fig 4: Knock Sensor 1 (KS1) Connector - D

Courtesy of FORD MOTOR CO.

Fig 5: Knock Sensor 1 (KS1) Connector - E

Courtesy of FORD MOTOR CO.

Fig 6: Knock Sensor 1 (KS1) Connector - F

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Edge, F-Super Duty 6.8L, MKX, Sable, Taurus, Taurus X	A	3 4 1 2	KS2+ KS2- KS1+ KS1-
Escape/Mariner, Fusion 2.3L, Milan 2.3L	B	1 2	KS1+ KS1-
Expedition, Navigator	C	1 2	KS1+ KS1-
F-150 4.2L, Ranger 3.0L	D	1 2	KS1+ KS1-
F-150 5.4L, F-Super Duty 5.4L, Mark LT	C	2 1	KS1+ KS1-
Fusion 3.0L, Milan 3.0L, Ranger 2.3L	B	2 1	KS1+ KS1-
MKZ	A	1 2	KS1+ KS1-
Mountaineer 4.6L	E	1 2	KS1+ KS1-
Mustang 4.6L	E	3 4	KS1+ KS1-
All other vehicles	F	2 1	KS1+ KS1-

Fig 7: Knock Sensor 2 (KS2) Connector - A

Courtesy of FORD MOTOR CO.

Fig 8: Knock Sensor 2 (KS2) Connector - B

Courtesy of FORD MOTOR CO.

Fig 9: Knock Sensor 2 (KS2) Connector - C

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Expedition, F-Super Duty 5.4L, Navigator	A	1 2	KS2+ KS2-
F-150, Mark LT	A	2 1	KS2+ KS2-
Mustang	B	1 2	KS2+ KS2-
All other vehicles	C	3 4	KS2+ KS2-

For PCM connector views or reference values, refer to the REFERENCE VALUES article.

Vehicle	Connector	Pin	Circuit
Edge, MKX, Sable, Taurus, Taurus X	190 Pin	E31 E30 E49 E48 B29, B64 B51	KS2+ KS2- KS1+ KS1- VREF VPWR
Escape/Mariner	150 (50-50-50) Pin	E32 E20 E40 B35	KS1+ KS1- VREF VPWR
Expedition, MKZ, Navigator	140 Pin	E31 E30 E49 E48 E57 B51	KS2+ KS2- KS1+ KS1- VREF VPWR
F-150 4.6L, F-150 4.2L	190 Pin	E49 E48 E57 B51	KS1+ KS1- VREF VPWR
F-150 5.4L, Mark LT	190 Pin	E31 E30 E49 E48 E57 B51	KS2+ KS2- KS1+ KS1- VREF VPWR
F-Super Duty, Mustang 4.6L	170 Pin	E31 E30 E49 E48 E57 B35	KS2+ KS2- KS1+ KS1- VREF VPWR
Focus	190 Pin	E46 E47 E63 B67	KS1+ KS1- VREF VPWR
Fusion, Milan	140 Pin	E49 E48 E57 B51	KS1+ KS1- VREF VPWR
All other vehicles	170 Pin	E49 E48 E57 B35	KS1+ KS1- VREF VPWR