Wipers/Washers (MICU, Rear MICU, and Relay Control Module) Input Test (2016)

MICU

NOTE:

Before testing, make sure the No. D11 (7.5 A) fuse in driver's under-dash fuse/relay box, the No. F12 (10 A) and the No. F13 (7.5 A) fuses in rear fuse box are OK.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks (2014 2015 2016) .

1. Turn the vehicle to the OFF (LOCK) mode.

2. Disconnect driver's under-dash fuse/relay box connectors F, G, H, and P - Refer to: Driver's Under-Dash Fuse/Relay Box Removal and Installation .

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

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

3. 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 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.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
P4 . P3	BLU . BLK	Wiper/washer switch (intermittent dwell timer) turned	Measure the resistance between terminals P4 and P3: The resistance should vary from about 0 to 1 kΩ.	Faulty wiper/washer switch An open or high resistance in the wire A short to ground in the wire

5. Reconnect the connectors to the driver's under-dash fuse/relay box.

6. Turn the vehicle to the OFF (LOCK) mode, and 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 7.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
H1	BLK	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G502) An open or high resistance in the ground wire
G6	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
P2	BRN	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
G14	LT GRN	Shift position/mode in P	Check for continuity to ground: There should be continuity.	Faulty TCM Faulty SBW shifter control module An open or high resistance in the wire
G14	LT GRN	Shift position/mode in any position other than P	Check for continuity to ground: There should be no continuity.	Faulty SBW shifter control module Faulty TCM A short to ground in the wire
F7 *2	PUR	Brake pedal pressed	Measure the voltage to ground: There should be battery voltage.	Blown No. B8 (20 A) and No. B2-6 (30 A) fuses in the main under-hood fuse/relay box Faulty brake pedal position switch An open or high resistance in the wire
F7 *2	PUR	Brake pedal released	Measure the voltage to ground: There should be no voltage.	Faulty brake pedal position switch A short to power in the wire
F7 *3	PUR	Brake pedal pressed	Measure the voltage to ground: There should be battery voltage.	Blown No. B8 (10 A) fuse in the main under-hood fuse/relay box Faulty DC-DC converter Faulty brake pedal position switch An open or high resistance in the wire
F7 *3	PUR	Brake pedal released	Measure the voltage to ground: There should be no voltage.	Faulty brake pedal position switch A short to power in the wire

*1: With headlight washer*2: Without auto idle stop system*3: With auto idle stop system

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
P14 *1	BLU	Headlight washer switch ON	Measure the voltage to ground: There should be less than 0.2 V.	Faulty headlight washer switch An open or high resistance in the wire
P14 *1	BLU	Headlight washer switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty headlight washer switch A short to ground in the wire
P10 . P3	ORN . BLK	Wiper switch (INT or LO) ON	Measure the voltage between terminals P10 and P3: There should be less than 0.2 V.	Faulty wiper/washer switch An open or high resistance in the wire
P10 . P3	ORN . BLK	Wiper switch OFF	Measure the voltage between terminals P10 and P3: There should be about 5 V.	Faulty wiper/washer switch A short to ground in the wire
P16 . P3	WHT . BLK	Wiper switch (LO or HI) ON	Measure the voltage between terminals P16 and P3: There should be less than 0.2 V.	Faulty wiper/washer switch An open or high resistance in the wire
P16 . P3	WHT . BLK	Wiper switch OFF	Measure the voltage between terminals P16 and P3: There should be about 5 V.	Faulty wiper/washer switch A short to ground in the wire
P9 . P3	GRN . BLK	Wiper switch (MIST) ON	Measure the voltage between terminals P9 and P3: There should be less than 0.2 V.	Faulty wiper/washer switch An open or high resistance in the wire
P9 . P3	GRN . BLK	Wiper switch OFF	Measure the voltage between terminals P9 and P3: There should be about 5 V.	Faulty wiper/washer switch A short to ground in the wire
P8 . P3	YEL . BLK	Washer switch ON	Measure the voltage between terminals P8 and P3: There should be less than 0.2 V.	Faulty wiper/washer switch An open or high resistance in the wire
P8 . P3	YEL . BLK	Washer switch OFF	Measure the voltage between terminals P8 and P3: There should be about 5 V.	Faulty wiper/washer switch A short to ground in the wire
P7 . P3	BLU . BLK	Rear window wiper/washer switch (INT) ON	Measure the voltage between terminals P7 and P3: There should be less than 0.2 V.	Faulty wiper/washer switch An open or high resistance in the wire
P7 . P3	BLU . BLK	Rear window wiper/washer switch (INT) OFF	Measure the voltage between terminals P7 and P3: There should be about 5 V.	Faulty wiper/washer switch A short to ground in the wire
P6 . P3	WHT . BLK	Rear window wiper/washer switch (INT, LO or WASH) ON	Measure the voltage between terminals P6 and P3: There should be less than 0.2 V.	Faulty wiper/washer switch An open or high resistance in the wire
P6 . P3	WHT . BLK	Rear window wiper/washer switch (INT, LO or WASH) OFF	Measure the voltage between terminals P6 and P3: There should be about 5 V.	Faulty wiper/washer switch An open or high resistance in the wire
P5 . P3	GRN . BLK	Rear window wiper/washer switch (WASH) ON	Measure the voltage between terminals P5 and P3: There should be less than 0.2 V.	Faulty wiper/washer switch An open or high resistance in the wire
P5 . P3	GRN . BLK	Rear window wiper/washer switch (WASH) OFF	Measure the voltage between terminals P5 and P3: There should be about 5 V.	Faulty wiper/washer switch A short to ground in the wire

*1: With headlight washer

*2: Without auto idle stop system

*3: With auto idle stop system

Rear MICU

7. Turn the vehicle to the OFF (LOCK) mode.

8. Disconnect rear fuse/relay box connectors A and B

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

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

9. 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 10.

10. 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 11.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A35	LT BLU	Under all conditions	Connect battery power to terminal A35: The rear window wiper motor should run.	Poor ground (G603) Faulty rear window wiper motor An open or high resistance in the wire

11. Reconnect the connectors to the rear fuse/relay box, and 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 12.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B29	GRY	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. D10 (15 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box An open or high resistance in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B16	BLK/WHT	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G605) An open or high resistance in the ground wire
A1	BLK/WHT	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G605) An open or high resistance in the ground wire
B26	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G606) An open or high resistance in the ground wire
A29	BLK	Under all conditions	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G606) An open or high resistance in the ground wire

Relay Control Module

12. Turn the vehicle to the OFF (LOCK) mode.

13. Disconnect relay control module connectors B, D and E

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

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

14. 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 are OK, go to step 15.

15. Reconnect the connectors to the relay control module, 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
B1	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G204) An open or high resistance in the ground wire
D12	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G204) An open or high resistance in the ground wire
E4	LT GRN	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. C31 (30 A) fuse in the under-hood fuse/relay box Faulty wiper motor relay An open or high resistance in the wire
D2	LT BLU	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. C4 (15 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire

16. Turn the vehicle to the OFF (LOCK) mode.

17. Disconnect the connectors from the relay control module, and 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 18.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired results not obtained
B2 *	LT GRN	Under all conditions	Connect to ground with a jumper wire: The headlight washer motor should run.	Blown No. B3-8 (30 A) fuse in the main under-hood fuse/relay box Faulty headlight washer relay Faulty headlight washer motor Poor ground (G204) or an open in the ground wire An open or high resistance in the wire
D3	GRN	Under all conditions	Connect terminals D3 and D2 with a jumper wire: The windshield washer motor should run.	Faulty windshield washer motor Poor ground (G204) or an open in the ground wire An open or high resistance in the wire

*: With headlight washer

18. If multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box - Refer to: Driver's Under-Dash Fuse/Relay Box Removal and Installation and/or rear fuse/relay box (includes the MICU).

If input failures are related to a particular control unit, replace the control unit.