Electrical Compass Unit Input Test

Remove the rear shelf (see TRIM REMOVAL/INSTALLATION - REAR SHELF AREA )
Loosen the bolts (A), then pull our the electrical compass unit bracket (B)

Fig 1: Identifying Electrical Compass Unit Bracket
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Disconnect the 6P connector (C) from the electrical compass unit (D), and remove the mounting bolt (E), then pull out the electrical compass unit
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

Reconnect the connector to the electrical compass unit 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

TEST CONDITION REFERENCE CHART

Cavity	Wire	Test Condition	Test Desired result	Possible cause if result is not obtained
2	BLK	Under all conditions	Measure the voltage to ground There should be less than 0 1 V	Poor ground (G651) An open in the wire
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
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

Disconnect the 6P connector from the electrical compass unit, disconnect the audio unit connector B (20P), and do the following input tests at the connectors

TEST CONDITION REFERENCE CHART

Cavity	Wire	Test Condition	Test Desired result	Possible cause if 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
3	LT BLU	Under all conditions	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
4	PNK	Under all conditions	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
5	ORN	Under all conditions	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
6	RED	Under all conditions	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 )