Pinpoint Test B: The Compass Is Inoperative
- B1 CHECK CIRCUIT 640 (BK/LG) FOR BATTERY VOLTAGE
- Disconnect: Compass Sensor Module C909.
- Key in ON position.
- Measure the voltage between the compass sensor module C909 pin 2, circuit 640 (BK/LG), harness side and ground.
Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes
: GO to B2.
- No
: REPAIR the circuit. TEST the system for normal operation.
- B2 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the compass sensor module C909 pin 1, circuit 57 (BK), harness side and ground.
Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes
: GO to B3.
- No
: REPAIR the circuit. TEST the system for normal operation.
- B3 CHECK CIRCUIT 703 (WH/OG) FOR AN OPEN OR SHORT TO GROUND
- Disconnect: Instrument Cluster C220.
- Measure the resistance between the compass sensor module C909 pin 3, circuit 703 (WH/OG), harness side and the instrument cluster C220 pin 31, circuit 703 (WH/OG), harness side; and between the compass sensor module C909 pin 3, circuit 703 (WH/OG), harness side and ground.
Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between the compass sensor module and the instrument cluster; and greater than 10,000 ohms between the compass sensor module and ground?
- Yes
: GO to B4.
- No
: REPAIR the circuit. TEST the system for normal operation.
- B4 CHECK CIRCUIT 702 (WH/BK) FOR AN OPEN OR SHORT TO GROUND
- Measure the resistance between the compass sensor module C909 pin 4, circuit 702 (WH/BK), harness side and the instrument cluster C220 pin 32, circuit 702 (WH/BK), harness side; and between the compass sensor module C909 pin 4, circuit 702 (WH/BK), harness side and ground.
Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes
: INSTALL a new compass sensor module. SET the zone. refer to COMPASS ZONE ADJUSTMENT . TEST the system for normal operation.
- No
: REPAIR the circuit. TEST the system for normal operation.