Keyless/Power Door Locks/Security System (MICU, Door Multiplex Control Unit, and Front Passenger's Power Window Switch) Input Test (2016-17)

WARNING: This page is about a different car, the 2016 Acura RDX, 2015 Acura RDX, 2014 Acura RDX, and 2013 Acura RDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Before testing, make sure the No. A29 (10 A) fuse in the under-hood fuse/relay box is OK.
Before testing, make sure the No. B5 (7.5 A), No. B8 (15 A), No. B9 (15 A), No. B15 (10 A), No. B30 (10 A), No. B32 (15 A), No. B33 (15 A), and No. B41 (20 A) fuses in the under-dash fuse/relay box are OK.
Before testing, make sure the headlights, parking lights, side marker lights, taillights, turn signal lights, and horns are work properly.
There are two pairs of fuses in the same circuit (No. B8 and No. B32 fuses, No. B9 and No. B33 fuses, and No. B15 and No. B30 fuses). If one fuse is blown, make sure to check the other fuse in the same circuit. If necessary, replace the blown fuse(s).

MICU

1. Press the engine start/stop button to select the OFF mode.

2. Disconnect under-dash fuse/relay box connectors B, C, D, N, R, S, and W .

NOTE: All connector views are shown from the wire side of the female terminals.

Courtesy of HONDA, U.S.A., INC.

3. Inspect the connectors and socket terminals to be 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 4.

4. With the connectors still disconnected, do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 5.

NOTE: These are door lock actuator operation tests for keyless entry.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired resultis not obtained
N10	LT BLU	Connect terminals D2^* and N10 (or N12), and terminal N12 (or N10) and ground with jumper wires.	Check actuator operation:The driver's door lock actuator should LOCK (or UNLOCK).	Faulty driver's door lock actuator An open or high resistance in the wire
N12	GRY
S3	LT BLU	Connect terminals D2^* and S3 (or S1), and terminal S1 (or S3) and ground with jumper wires.	Check actuator operation:The front passenger's door lock actuator should LOCK (or UNLOCK).	Faulty front passenger's door lock actuator An open or high resistance in the wire
S1	YEL		Check actuator operation:The right rear door lock actuator should LOCK (or UNLOCK).	Faulty right rear door lock actuator An open or high resistance in the wire
B15	LT BLU	Connect terminals D2^* and B15 (or B10), and terminal B10 (or B15) and ground with jumper wires.	Check actuator operation:The left rear door lock actuator should LOCK (or UNLOCK).	Faulty left rear door lock actuator An open or high resistance in the wire
B10	PUR
B7	BRN	Connect terminals D2^* and B7 with a jumper wire momentarily.	Check actuator operation:The tailgate release actuator should work.	Faulty tailgate release actuator Poor ground (G602) or an open in the ground wire An open or high resistance in the wire

*: Use a fused jumper wire with an appropriate amperage fuse.

5. Reconnect the connectors to the under-dash fuse/relay box; do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 6.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired resultis not obtained
D17	GRN	Under all conditions	Measure the voltage to ground:There should be battery voltage.	Blown No. A29 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
D2	GRN	Under all conditions	Measure the voltage to ground:There should be battery voltage.	Blown No. A2-2 (60 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
W6	BLK	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G501) An open or high resistance in the ground wire
B32	BLK	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G601) An open or high resistance in the ground wire
B20	BLK	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G601) An open or high resistance in the ground wire

*: If the factory-installed audio unit is removed from the vehicle, this voltage will be between 10-12 V.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired resultis not obtained
R7	BLK	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G501) An open or high resistance in the ground wire
C27	GRY	Hood closed	Measure the voltage to ground:There should be less than 0.2 V.	Faulty security hood switch Poor ground (G301) or an open in the ground wire An open or high resistance in the wire
C27	GRY	Hood open	Measure the voltage to ground:There should be about 5 V.	Faulty security hood switch A short to ground in the wire
B40	GRN	Driver's door open	Measure the voltage to ground:There should be less than 0.2 V.	Faulty driver's door switch Faulty driver's door switch ground An open or high resistance in the wire
B40	GRN	Driver's door closed	Measure the voltage to ground:There should be about 5 V.	Faulty driver's door switch A short to ground in the wire
N11	LT GRN	Front passenger's door open	Measure the voltage to ground:There should be less than 0.2 V.	Faulty front passenger's door switch Faulty front passenger's door switch ground An open or high resistance in the wire
N11	LT GRN	Front passenger's door closed	Measure the voltage to ground:There should be about 5 V.	Faulty front passenger's door switch A short to ground in the wire
B33	BRN	Left rear door open	Measure the voltage to ground:There should be less than 0.2 V.	Faulty left rear door switch Faulty left rear door switch ground An open or high resistance in the wire
B33	BRN	Left rear door closed	Measure the voltage to ground:There should be about 5 V.	Faulty left rear door switch A short to ground in the wire
B34	WHT	Right rear door open	Measure the voltage to ground:There should be less than 0.2 V.	Faulty right rear door switch Faulty right rear door switch ground An open or high resistance in the wire
B34	WHT	Right rear door closed	Measure the voltage to ground:There should be about 5 V.	Faulty right rear door switch A short to ground in the wire
W5	GRY	Left rear door lock knob switch in UNLOCK	Measure the voltage to ground:There should be less than 0.2 V.	Faulty left rear door lock knob switch Poor ground (G601) or an open in the ground wire An open or high resistance in the wire
W5	GRY	Left rear door lock knob switch in LOCK	Measure the voltage to ground:There should be about 5 V.	Faulty left rear door lock knob switch A short to ground in the wire

*: If the factory-installed audio unit is removed from the vehicle, this voltage will be between 10-12 V.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired resultis not obtained
W4	BLU	Right rear door lock knob switch in UNLOCK	Measure the voltage to ground:There should be less than 0.2 V.	Faulty right rear door lock knob switch Poor ground (G651) or an open in the ground wire An open or high resistance in the wire
W4	BLU	Right rear door lock knob switch in LOCK	Measure the voltage to ground:There should be about 5 V.	Faulty right rear door lock knob switch A short to ground in the wire
W23	PNK	Tailgate outer handle switch pressed	Measure the voltage to ground:There should be less than 0.2 V.	Faulty tailgate outer handle switch Poor ground (G602) or an open in the ground wire An open or high resistance in the wire
W23	PNK	Tailgate outer handle switch released	Measure the voltage to ground:There should be about 5 V.	Faulty tailgate outer handle switch A short to ground in the wire
B22	BLU	Power tailgate closer unit connector B (6P) disconnected	Check for continuity between terminal B22 and power tailgate closer unit connector B (6P) terminal No. 5:There should be continuity	An open or high resistance in the wire
D22	PUR	Transmission range switch in P position/mode	Measure the voltage to ground:There should be less than 0.2 V.	Faulty or improperly adjusted transmission range switch Poor ground (G101) or an open in the ground wire An open or high resistance in the wire
D22	PUR	Transmission range switch in any other position/mode than P	Measure the voltage to ground:There should be about 5 V.	A short to ground in the wire Faulty or improperly adjusted transmission range switch
W9	YEL	Under all conditions	Measure the voltage to ground:There should be less than 0.2 V.^*	Faulty audio unit, navigation display unit, or audio-navigation unit Poor ground (G504) or an open in the ground wire An open or high resistance in the wire

*: If the factory-installed audio unit is removed from the vehicle, this voltage will be between 10-12 V.

Door Multiplex Control Unit

6. Press the engine start/stop button to select the OFF mode.

7. Disconnect the power window master switch 37P connector .

Courtesy of HONDA, U.S.A., INC.

8. Inspect the connector and socket terminals to be sure they are all making good contact.

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 9.

9. With the connector still disconnected, do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 10.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired resultis not obtained
36	WHT	Disconnect the front passenger's power window switch 37P connector and the moonroof motor-control unit 14P connector	Check for continuity between terminal No. 36 and front passenger's power window switch 37P connector terminal No. 34:There should be continuity.	An open in the LIN (P/W) wire
			Check for continuity between terminal No. 36 and moonroof motor-control unit 14P connector terminal No. 12: There should be continuity.	An open in the LIN (P/W) wire
			Check for continuity to ground:There should be no continuity.	A short to ground in the LIN (P/W) wire

10.Reconnect the connector, do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 11.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired resultis not obtained
25	BRN	Power mode ON	Measure the voltage to ground:There should be battery voltage.	Blown No. B22 (7.5 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
26	GRN	Under all conditions	Measure the voltage to ground:There should be battery voltage.	Blown No. A29 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
4	WHT	Under all conditions	Measure the voltage to ground:There should be battery voltage.	Blown No. B42 (20 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired resultis not obtained
3	BLK	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G501) An open or high resistance in the ground wire
31	BLK	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G501) An open or high resistance in the ground wire
35	ORN	Driver's door key cylinder switch in LOCK	Measure the voltage to ground:There should be less than 0.2 V.	Faulty driver's door key cylinder switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
35	ORN	Driver's door key cylinder switch in neutral or UNLOCK	Measure the voltage to ground:There should be about 5 V.	Faulty driver's door key cylinder switch A short to ground in the wire
34	BRN	Driver's door lock knob switch in UNLOCK	Measure the voltage to ground:There should be less than 0.2 V.	Faulty driver's door key cylinder switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
34	BRN	Driver's door lock knob switch in LOCK	Measure the voltage to ground:There should be about 5 V.	Faulty driver's door key cylinder switch An open or high resistance in the wire
33	YEL	Driver's door lock knob switch in LOCK	Measure the voltage to ground:There should be less than 0.2 V.	Faulty driver's door lock knob switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
33	YEL	Driver's door lock knob switch in UNLOCK	Measure the voltage to ground:There should be about 5 V.	Faulty driver's door lock knob switch A short to ground in the wire
32	PNK	Driver's door lock knob switch in UNLOCK	Measure the voltage to ground:There should be less than 0.2 V.	Faulty driver's door lock knob switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
32	PNK	Driver's door lock knob switch in LOCK	Measure the voltage to ground:There should be about 5 V.	Faulty driver's door lock knob switch An open or high resistance in the wire

Front Passenger's Power Window Switch

11.Press the engine start/stop button to select the OFF mode, open and close the driver's door.12.Disconnect the front passenger's power window switch 37P connector - Refer to: Rear Power Window Switch Removal and Installation (2013-17), or Front Passenger's Power Window Switch Removal and Installation (2013-17) .

Courtesy of HONDA, U.S.A., INC.

13.Inspect the connector and socket terminals to be 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 14.

14.With the connector still disconnected, do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 15.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired resultis not obtained
34	WHT	Disconnect the power window master switch 37P connector and the moonroof motor-control unit 14P connector	Check for continuity between terminal No. 34 and power window master switch 37P connector terminal No. 36:There should be continuity.	An open in the LIN (P/W) wire
			Check for continuity between terminal No. 34 and moonroof motor-control unit 14P connector terminal No. 12:There should be continuity.	An open in the LIN (P/W) wire
			Check for continuity to ground:There should be no continuity.	A short to ground in the LIN (P/W) wire

15.Reconnect the connector, do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 16.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
4	GRN	Under all conditions	Measure the voltage to ground:There should be battery voltage.	Blown No. B44 (20 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
3	BLK	In all power modes	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G506) An open or high resistance in the ground wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
29	PUR	Front passenger's door lock knob switch in UNLOCK	Measure the voltage to ground:There should be less than 0.2 V.	Front passenger's door lock knob switch Poor ground (G506) or an open in the ground wire An open or high resistance in the wire
29	PUR	Front passenger's door lock knob switch in LOCK	Measure the voltage to ground:There should be about 5 V.	Front passenger's door lock knob switch A short to ground in the wire

16.If multiple failures are found on more than one control unit, replace the under-dash fuse/relay box (includes the MICU) . If input failures are related to a particular control unit, replace the control unit.