Wipers/Washers (MICU) Input Test

NOTE:

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 Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFF Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
Before testing, make sure the No. A2-9 (30 A) and No. A29 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. B13 (15 A), No. B23 (10 A), No. B28 (15 A)^*1 and No. B36 (10 A)^*2 fuses in the under-dash fuse/relay box are OK.

*1: Without keyless access system *2: With keyless access system

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

2. Disconnect the following connectors.

Under-dash fuse/relay box connector B (44P)

Under-dash fuse/relay box connector C (38P)

Under-dash fuse/relay box connector D (32P)

Under-dash fuse/relay box connector P (20P)

Under-dash fuse/relay box connector R (8P)

Under-dash fuse/relay box connector T (20P)

Under-dash fuse/relay box connector W (24P)

Under-dash fuse/relay box connector X (10P)

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

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 are 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
C22	WHT	Under all conditions	Connect terminals D3 and P9, and terminal C22 to body ground with jumper wires: The windshield wiper motor should run at high speed.	Faulty relay circuit board Faulty windshield wiper motor Poor ground (G302) or an open in the ground wire Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
C32	BLU	Run the windshield wiper motor by connect terminals D3 and P9, and terminal C22 to body ground with jumper wires.	Connect terminal C32 to body ground with a jumper wire: The windshield wiper motor speed should change from high speed to low speed.	Faulty relay circuit board Faulty windshield wiper motor An open or high resistance in the wire
C6.C15	PNK.ORN	Under all conditions	Connect terminals C6 and D3, and terminal C15 to body ground with jumper wires: The windshield/rear window washer motor should run.	Faulty windshield/rear window washer motor An open or high resistance in the wire
C23	GRY	Run the windshield wiper motor by connecting terminals D3 and P9, and terminal C22 and body ground with jumper wires.	Use a DVOM to check for continuity to ground.NOTE: There is no needle on a DVOM.	Faulty windshield wiper motor An open or high resistance in the wire
P9^1 T20^1	LT BLU.BRN	Under all conditions	Connect terminals D3 and P9, and terminal T20 to body ground with jumper wires: The rear window wiper motor should run.	Faulty rear window wiper motor Poor ground (G603) or an open in the ground wire An open or high resistance in the wire
B1^2 T20^2	YEL.BRN	Under all conditions	Connect terminals D2 and B1, and terminal T20 to body ground with jumper wires: The rear window wiper motor should run.	Faulty rear wiper main relay Faulty rear window wiper motor Poor ground (G603) or an open in the ground wire An open or high resistance in the wire
T6.T15	BLU.RED	Windshield wiper/washer switch (Intermittent dwell time controller) turned ON.	Measure the resistance between terminals T6 and T15: The resistance should vary between 0 to 1 kΩ.	Faulty windshield wiper/washer switch An open or high resistance in the ground wire A short to ground in the wire

*1: Without keyless access system *2: With keyless access system

5. Reconnect the connectors to the under-dash 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, the MICU must be faulty; replace the under-dash fuse/relay box .

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
D17	RED	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
W6	BLK	In all ignition switch positions or 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
B20	BLK	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G604) An open or high resistance in the ground wire
B32	BLK	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G604) An open or high resistance in the ground wire
D10	BRN	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G402) An open or high resistance in the ground wire
R7	BLK	In all ignition switch positions or 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
C16	BLU	Brake pedal pressed	Measure the voltage to ground: There should be battery voltage.	Blown No. A16 (10 A) fuse in the under-hood fuse/relay box Faulty brake pedal position switch An open or high resistance in the wire
C16	BLU	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
T15T16	RED.TAN	Windshield wiper/washer switch (INT or LO) ON	Measure the voltage to ground: There should be less than 0.2 V.	Faulty windshield wiper/washer switch An open or high resistance in the wire
T15T16	RED.TAN	Windshield wiper/washer switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty windshield wiper/washer switch A short to ground in the wire
T15.T18	RED.GRN	Windshield wiper/washer switch (MIST) ON	Measure the voltage to ground: There should be less than 0.2 V.	Faulty windshield wiper/washer switch An open or high resistance in the wire
T15.T18	RED.GRN	Windshield wiper/washer switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty windshield wiper/washer switch A short to ground in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
T15.T17	RED.WHT	Windshield wiper/washer switch (LO or HI) ON	Measure the voltage to ground: There should be less than 0.2 V.	Faulty windshield wiper/washer switch An open or high resistance in the wire
T15.T17	RED.WHT	Windshield wiper/washer switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty windshield wiper/washer switch A short to ground in the wire
T15.T19	RED.YEL	Windshield washer switch ON	Measure the voltage to ground: There should be less than 0.2 V.	Faulty windshield wiper/washer switch An open or high resistance in the wire
T15.T19	RED.YEL	Windshield washer switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty windshield wiper/washer switch A short to ground in the wire
T10.T15	PNK.RED	Rear window wiper switch ON	Measure the voltage to ground: There should be less than 0.2 V.	Faulty rear window wiper/washer switch An open or high resistance in the wire
T10.T15	PNK.RED	Rear window wiper switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty rear window wiper/washer switch A short to ground in the wire
T9.T15	LT BLU.RED	Rear window wiper switch INT	Measure the voltage to ground: There should be less than 0.2 V.	Faulty rear window wiper/washer switch An open or high resistance in the wire
T9.T15	LT BLU.RED	Rear window wiper switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty rear window wiper/washer switch A short to ground in the wire
T8.T15	GRY.RED	Rear window washer switch ON	Measure the voltage to ground: There should be less than 0.2 V.	Faulty rear window wiper/washer switch An open or high resistance in the wire
T8.T15	GRY.RED	Rear window washer switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty rear window wiper/washer switch A short to ground in the wire
D22	GRN	Transmission range switch in P	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	GRN	Transmission range switch in any other position than P	Measure the voltage to ground: There should be about 5 V.	Faulty or improperly adjusted transmission range switch A short to ground in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
D21	PUR	Transmission range switch in R	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
D21	PUR	Transmission range switch in any other position than R	Measure the voltage to ground: There should be about 5 V.	Faulty or improperly adjusted transmission range switch A short to ground in the wire