Electrical Compass - Electronic Compass: Diagnosis Ford Escape II

Inspection and Verification

Note. The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical or electrical damage. VISUAL INSPECTION CHART Mechanical Electrical Compass module Front Display Interface Module (FDIM) Smart Junction Box (SJB) fuses: 14 (10A) 41 (15A) Wiring, terminals or connectors
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
5. If the scan tool does not communicate with the VCM: Check the VCM connection to the vehicle. Check the scan tool connection to the VCM. Refer to «MODULE COMMUNICATIONS NETWORK»(ref-344076) , No Power To The Scan Tool, to diagnose no power to the scan tool.
6. If the scan tool does not communicate with the vehicle: Verify the ignition key is in the ON position. Verify the scan tool operation with a known good vehicle. Refer to «MODULE COMMUNICATIONS NETWORK»(ref-344076) to diagnose no response from the PCM.
7. Carry out the network test. If the scan tool responds with no communication for one or more modules, refer to «MODULE COMMUNICATIONS NETWORK»(ref-344076) . If the network test passes, retrieve and record the continuous memory DTCs.
8. Clear the continuous DTCs and carry out the self-test diagnostics for the FDIM and the Instrument Cluster (IC).
9. If the DTCs retrieved are related to the concern, go to «DTC CHARTS»(ref-344146-S42036330022009101600000) . For all other DTCs, refer to the Diagnostic Trouble Code (DTC) Chart in «MULTIFUNCTION ELECTRONIC MODULES»(ref-344077) .
10. If no DTCs related to the concern are retrieved, GO to «SYMPTOM CHART»(ref-344146-S31528125512009101600000) .

DTC Charts

INSTRUMENT CLUSTER (IC) DTC CHART

Symptom Chart

SYMPTOM CHART

Pinpoint Test A: The Compass Is Inoperative

Refer to SYSTEM WIRING DIAGRAMS - ESCAPE or SYSTEM WIRING DIAGRAMS - MARINER , Audio System/Navigation for schematic and connector information.

Note. This pinpoint test is for vehicles without navigation. For vehicles with navigation, refer to INFORMATION AND ENTERTAINMENT SYSTEMS .

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Note. Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .

Scheme 2

Scheme 3

Scheme 4

Scheme 5

1. A1 CHECK THE COMPASS DISPLAY Ignition ON. Check the compass display. Does the compass display illuminate? Yes: If the compass display illuminates with only 2 bars, GO to A3 . If the compass display turns on, but it does not display all directions, or indicates CAL, GO to «PINPOINT TEST B»(ref-344146-S03021835122009101600000) . No: GO to A2 .
2. A2 CHECK THE VEHICLE CONFIGURATION Verify the vehicle is equipped with the compass feature. Is the vehicle equipped with the compass feature? Yes: REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-344106) to diagnose the FDIM display. No: RETURN the vehicle to the customer and ADVISE them the vehicle is not equipped with a compass display feature.
3. A3 CHECK CIRCUIT CBP41 (BU) FOR VOLTAGE Ignition OFF. Disconnect: Interior Rear View Mirror C9012. Ignition ON. Measure the voltage between the interior rear view mirror C9012-1, circuit CBP41 (BU), harness side and ground. Is the voltage greater than 10 volts? Yes: GO to A4 . No: VERIFY the SJB fuse 41 (15A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the «SYSTEM WIRING DIAGRAMS - ESCAPE»(ref-311193) or «SYSTEM WIRING DIAGRAMS - MARINER»(ref-311218) to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
4. A4 CHECK CIRCUIT GD182 (BK/GY) FOR AN OPEN Ignition OFF. Disconnect: Negative Battery Cable. Measure the resistance between the interior rear view mirror C9012-3, circuit GD182 (BK/GY), harness side and ground. Is the resistance less than 5 ohms? Yes: GO to A5 . No: REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
5. A5 CHECK CIRCUIT VMC31 (YE/GN) FOR AN OPEN OR A SHORT TO GROUND Disconnect: Interior Rear View Mirror C9012. Disconnect: IC C220. Measure the resistance between the interior rear view mirror C9012-6, circuit VMC31 (YE/GN), harness side and the IC C220-16, circuit VMC31 (YE/GN), harness side; and between the interior rear view mirror C9012-6, circuit VMC31 (YE/GN), harness side and ground. Is the resistance less than 5 ohms between the interior rear view mirror and the IC, and greater than 10,000 ohms between the interior rear view mirror and ground? Yes: GO to A6 . No: REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
6. A6 CHECK CIRCUIT VMC30 (BU/GY) FOR AN OPEN OR A SHORT TO GROUND Measure the resistance between the interior rear view mirror C9012-7, circuit VMC30 (BU/GY), harness side and the IC C220-17, circuit VMC30 (BU/GY), harness side; and between the interior rear view mirror C9012-7, circuit VMC30 (BU/GY), harness side and ground. Is the resistance less than 5 ohms between the interior rear view mirror and the IC, and greater than 10,000 ohms between the interior rear view mirror and ground? Yes: GO to A7 . No: REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the self-test.
7. A7 CHECK FOR DTC U2013 Connect: Negative Battery Cable. Connect: IC C220. Connect: Interior Rear View Mirror C9012. Ignition ON. Clear the DTCs. Ignition OFF. Ignition ON. Wait 10 seconds. Retrieve the IC DTCs. Is DTC U2013 present? Yes: INSTALL a new interior rear view mirror. REFER to «REAR VIEW MIRRORS»(ref-344150) . ADJUST the zone setting. REFER to «COMPASS ZONE ADJUSTMENT»(ref-344146-S06374941492009101600000) . CALIBRATE the compass. REFER to «COMPASS CALIBRATION»(ref-344146-S14919551672009101600000) . TEST the system for normal operation. No: GO to A8 .
8. A8 CHECK FOR CORRECT IC OPERATION Disconnect the IC connector. Check for: corrosion damaged pins pushed-out pins Connect the IC connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new IC. REFER to «INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES»(ref-344081) . RESET the parameters in both the IC and the PCM. REFER to «ANTI-THEFT - PATS»(ref-344135) (Gasoline) or «ANTI-THEFT - PATS - HYBRID»(ref-344128) (Hybrid). PROGRAM the PATS keys into the new IC. REFER to «ANTI-THEFT - PATS»(ref-344135) (Gasoline) or «ANTI-THEFT - PATS - HYBRID»(ref-344128) (Hybrid). CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.

Pinpoint Test B: The Compass Is Inaccurate

Note. This pinpoint test is for vehicles without navigation. For vehicles with navigation, refer to INFORMATION AND ENTERTAINMENT SYSTEMS .

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

1. B1 DEMAGNETIZE THE VEHICLE Demagnetize the vehicle. Refer to «VEHICLE DEMAGNETIZING»(ref-344146-S02277490432009101600000) . Does the compass operate correctly? Yes: The compass is OK. The concern may have been caused by an incorrect zone setting, a magnetized vehicle, or the compass was out of calibration. No: GO to B2 .
2. B2 CHECK THE COMPASS ACCURACY Position the vehicle and observe the compass display as follows: COMPASS DISPLAY REFERENCE CHART Direction Compass Display North N Northeast NE East E Southeast SE South S Southwest SW West W Northwest NW Does the compass display as indicated? Yes: The compass is OK. The concern may have been caused by an incorrect zone setting, a magnetized vehicle, or the compass was out of calibration. No: INSTALL a new compass module. REFER to Interior Rear View Mirror in «REAR VIEW MIRRORS»(ref-344150) . SET the zone. REFER to «COMPASS ZONE ADJUSTMENT»(ref-344146-S06374941492009101600000) . CALIBRATE the compass. REFER to «COMPASS CALIBRATION»(ref-344146-S14919551672009101600000) . TEST the system for normal operation.