2005 Mercury Mariner 3.0 1, FWDFACTORY OEM SERVICE PROCEDURE

Occupant Classification Sensor (OCS) Module Connector End View (C3159)

Fig 1: Occupant Classification Sensor (OCS) Module Connector End View (C3159)
G03993419Courtesy of FORD MOTOR CO.
C3159 CONNECTOR SPECIFICATION

Pin Circuit Gauge Circuit Function Qualifier
A 2089 (OG-BK) 20 Seat belt tensioner, passenger seat, signal  
B 2088 (TN-RD) 20 Seat belt tensioner, passenger seat, feed  
C 1203 (BK-LB) 20 Ground  
D 1203 (BK-LB) 20 Ground  
E 1918 (BR-WH) 20 High speed CAN bus +  
F 1919 (PK-OG) 20 High speed CAN bus -  
G 937 (RD-WH) 20 Voltage supplied in Start and Run (overload protected)  
H 1569 (GY-LB) 20 Seat pressure sensor, signal return  
J 1568 (RD-WH) 20 Seat pressure sensor, input  
K 1570 (TN-BK) 20 Seat pressure sensor, output  
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  • • 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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