Electrical Compass (4-cyl) Acura TSX II

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Symptom Troubleshooting Index

SYMPTOM TROUBLESHOOTING INDEX

Overview

The electrical compass sends the azimuth (direction) information in the 8-directions (N, NE, E, SE, S, SW, W, NW) to the audio-HVAC display unit via the audio unit.

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Starting Operation

When the ignition switch is turned to ACC (I), the electrical compass unit begins to communicate with the audio unit. Then turn the ignition switch to ON (II), the self-test mode begins automatically.

The self-test function checks for the current voltage, non-volatile memory (NVM), and ROM status in the electrical compass unit. If the unit detects a malfunction while in the self-test, it indicates a malfunction by flashing compass information segments (CAL and NW) in the audio-HVAC display unit.

The electrical compass unit send the azimuth (direction) information to the audio unit. The electrical compass unit receive the VSP signal from the gauge control module via the audio unit. The azimuth information is fixed while parked.

Self-Calibration

The electrical compass unit has a self-calibration function. It detects and compensates for magnetic anomalies caused by bridges, subways and large steel structures. When the vehicle leaves an area with a strong magnetic interference field (2, 400 mG or more), the electrical compass unit automatically begins calibrating. If needed, you can manually calibrate the compass (see ELECTRICAL COMPASS ZONE SELECTION AND CALIBRATION ).

Zone Selection

Zone selection is required to compensate for the difference between magnetic North and geographic North. This deviation is referred to as declination, the compass compensates for declination when you select the zone where the vehicle is located.

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CONNECTOR TERMINALS REFERENCE CHART

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Electrical Compass Zone Selection and Calibration

Note. You should do this procedure any time the electrical compass unit is replaced. You should do this procedure in an open area away from buildings, power lines, other vehicles, and any other sources of strong magnetic fields. If you see - and the CAL indicator is shown in the audio-HVAC display, the electrical compass unit is self-calibrating. The electrical compass unit may need to be manually calibrated after exposure to a strong magnetic field. If the electrical compass unit seems to be continually showing the wrong direction, and is not self-calibrating, do the following.

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1. Check the No. 15 (10 A) fuse in the under-hood fuse/relay box and the No. 5 (7.5 A) and the No. 18 (7.5 A) fuses in the driver's under-dash fuse/relay box.
2. Turn the ignition switch to ON (II), then press and hold the MENU button (A) until it beeps (about 5 seconds).
3. Turn the selector knob (A) to select ZONE.
4. Press the selector knob (A) to enter your selection. The display shows the currently selected zone number. NOTE: If necessary, press the RETURN button (B) to return to the previous display. Pressing the MENU button (C) cancels the electrical compass setting mode.
5. Find the zone for your area on the map. If the correct zone is not shown, turn the selector knob to cycle the zone list up or down.
6. Once the correct zone is displayed, press the selector knob. The display then returns to normal.
7. Turn the selector knob to select CALIBRATION.
8. Press the selector knob to enter your selection. The display shows PUSH CAL START.
9. Press the selector knob, the compass display will blink and the CAL indicator is shown.
10. Drive the vehicle slowly in three complete circles (20 seconds or more per a circle). When the calibration is successfully completed, the compass display stops blinking and the CAL. indicator goes off. NOTE: While setting, pressing the RETURN button returns to the previous display. Pressing the MENU button cancels the compass setting mode. The audio system is not related to the electrical compass system. Even if the electrical compass system is calibrating, the display returns to the normal display which was last selected. If the calibration fails, try another location (an open area away from buildings, power lines, other vehicles, and any other sources of strong magnetic fields) and do the calibration procedure again.

Scheme 1235

1. Remove the rear shelf (see «REAR SHELF»(/acura/tsx/ii-2008-2014/remont/exteriorinterior-trim/#interior-trim-4-cyl__rear-shelf) ).
2. Loosen the bolts (A), then pull out the electrical compass unit bracket (B).
3. Disconnect the connector (C) and remove the mounting bolt (D), then pull out the electrical compass unit (E).
4. Inspect the connector and socket terminals to make sure they are all making good contact. If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to step 5.
5. Reconnect the electrical compass unit 6P connector. Turn the ignition switch to ON (II) and do the following input tests at the connectors. If any test indicates a problem, find and correct the cause, then recheck the system. If all input tests prove OK, go to step 6. INPUT TESTS REFERENCE CHART Cavity Wire Color Test Condition Test: Desired Result Possible Cause if Desired Result is not Obtained 1 BRN Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. 5 (7.5 A) fuse in the driver's under-dash fuse/relay box An open in the wire 2 BLK Ignition switch ON (II) Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G651) An open in the wire 3 LT BLU Under all conditions Measure the voltage to ground: There should be about 4 V. Faulty audio unit An open in the wire A short to ground in the wire 4 PNK Under all conditions Measure the voltage to ground: There should be about 4 V. Faulty audio unit An open in the wire A short to ground in the wire 5 ORN Under all conditions Measure the voltage to ground: There should be about 4 V. Faulty audio unit An open in the wire A short to ground in the wire 6 RED Under all conditions Measure the voltage to ground: There should be about 4 V. Faulty audio unit An open in the wire A short to ground in the wire
6. Disconnect the electrical compass unit 6P connector and audio unit connector B (20P), and do the following input tests at the connectors. INPUT TESTS REFERENCE CHART Cavity Wire Color Test Condition Test: Desired Result Possible Cause if Desired Result is not Obtained 3 LT BLU Under all conditions Check for continuity between electrical compass unit 6P connector terminal No. 3 and audio unit connector B (20P) terminal No. 12: There should be continuity. An open in the wire Check for continuity to body ground: There should be no continuity. An short to ground in the wire 4 PNK Under all conditions Check for continuity between electrical compass unit 6P connector terminal No. 4 and audio unit connector B (20P) terminal No. 11: There should be continuity. An open in the wire Check for continuity to body ground: There should be no continuity. An short to ground in the wire 5 ORN Under all conditions Check for continuity between electrical compass unit 6P connector terminal No. 5 and audio unit connector B (20P) terminal No. 2: There should be continuity. An open in the wire Check for continuity to body ground: There should be no continuity. An short to ground in the wire 6 RED Under all conditions Check for continuity between electrical compass unit 6P connector terminal No. 6 and audio unit connector B (20P) terminal No. 1: There should be continuity. An open in the wire Check for continuity to body ground: There should be no continuity. An short to ground in the wire If any test indicates a problem, find and correct the cause, then recheck the system. If all input tests prove OK, the electrical compass unit is faulty; replace it, and do the compass calibration (see «ELECTRICAL COMPASS ZONE SELECTION AND CALIBRATION»(/acura/tsx/ii-2008-2014/remont/entertainment-systems/#electrical-compass-4-cyl__electrical-compass-zone-selection-and-calibration) ).

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1. Remove the headliner (see «HEADLINER REMOVAL/INSTALLATION - SPORT WAGON»(/acura/tsx/ii-2008-2014/remont/exteriorinterior-trim/#interior-trim-4-cyl__headliner-removalinstallation-sport-wagon) ).
2. Remove the bolt (A), and pull out the electrical compass unit (B).
3. Disconnect the connector (C) and remove the electrical compass unit.
4. Inspect the connector and socket terminals to make sure they are all making good contact. If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to step 5.
5. Reconnect the electrical compass unit 6P connector. Turn the ignition switch to ON (II) and do the following input tests at the connectors. If any test indicates a problem, find and correct the cause, then recheck the system. If all input tests prove OK, go to step 6. INPUT TESTS REFERENCE CHART

See also:
• RADIO TUNER DOES NOT CHANGE STATIONS (WITH PREMIUM AUDIO)
• REAR SHELF
• HEADLINER REMOVAL/INSTALLATION - SPORT WAGON
• ELECTRICAL COMPASS UNIT INPUT TEST
• ELECTRICAL COMPASS ZONE SELECTION AND CALIBRATION