Wiper System / Washer System (MICU) Input Test ('13: K24Z7)

NOTE:

Refer to the Electrical Wiring Diagrams for the location of the under-dash fuse/relay box connectors.
Before testing, make sure the No. A29 (10 A) fuse in the under-hood fuse/relay box, and the No. B5 (7.5 A), No. B28 (15 A), and No. B46 (30 A) fuses in the under-dash fuse/relay box are OK.

1. Turn the ignition switch to LOCK (0)

2. Disconnect under-dash fuse/relay box connectors A, B, C, D, P, R, T, and W.NOTE: All connector views are shown from 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 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 isnot obtained
C4 . C22	GRN . BLU	Connect under-dash fuse/relay box connector A (5P), ignition switch ON (II)	Connect terminals C4 and A3, and terminal C22 to body ground with jumper wires: The windshield wiper motor should run at high speed.	Blown No. B46 (30 A) fuse in the under-dash fuse/relay box Faulty windshield wiper main relay Faulty windshield wiper high/low relay Faulty windshield wiper motor Poor ground (G201) or an open in the ground wire An open or high resistance in the wire
P20	BRN	In all ignition switch positions	Check for continuity to ground: There should be continuity.	Poor ground (G502) An open or high resistance in the ground wire
R7	BRN	In all ignition switch positions	Check for continuity to ground: There should be continuity.	Poor ground (G502) An open or high resistance in the ground wire
T6^* . T15	BLU . BLK	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
C32	PUR	Connect under-dash fuse/relay box connector A (5P), ignition switch ON (II), then run the windshield wiper motor by connecting terminals C4 and A3, and terminal C22 and 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 windshield wiper motor Faulty windshield wiper main relay Faulty windshield wiper high/low relay An open or high resistance in the wire
C15	ORN	Connect under-dash fuse/relay box connector A (5P), ignition switch ON (II)	Connect terminals C15 and A3 with a jumper wire: The windshield washer motor should run.	Faulty windshield washer motor Poor ground (G201) or an open in the ground wire An open or high resistance in the wire
C23	WHT	Connect under-dash fuse/relay box connector A (5P), ignition switch ON (II), then run the windshield wiper motor by connecting terminals C4 and A3, and terminal C22 and body ground with jumper wires.	Check for continuity to ground: The needle of the ohmmeter should pulse 1 time per wiper motor cycle.NOTE: Use a DVOM.	Faulty windshield wiper motor An open or high resistance in the wire

*: With intermittent dwell time controller

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 - Refer to: Under-Dash Fuse/Relay Box Removal and Installation(KA models with Keyless Access System)Under-Dash Fuse/Relay Box Removal and Installation(KA KX models without Keyless Access System) .

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result isnot obtained
A3	BLU	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	An open or high resistance in the wire
D28	WHT	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	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 ignition switch positions	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G602) An open or high resistance in the ground wire
D6	LT GRN	Brake pedal pressed	Measure the voltage to ground: There should be battery voltage.	Blown No. A17 (10 A^1 , 15 A^2 ) fuse in the under-hood fuse/relay box Faulty brake pedal position switch An open or high resistance in the wire
D6	LT GRN	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
T16 . T15	ORN . BLK	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 ground wire
T16 . T15	ORN . BLK	Windshield wiper/washer switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty windshield wiper/washer switch A short in the wire
T18 . T15	GRN . BLK	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 ground wire
T18 . T15	GRN . BLK	Windshield wiper/washer switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty windshield wiper/washer switch A short in the wire
T17 . T15	WHT . BLK	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 ground wire
T17 . T15	WHT . BLK	Windshield wiper/washer switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty windshield wiper/washer switch A short in the wire
T19 . T15	YEL . BLK	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 ground wire
T19 . T15	YEL . BLK	Windshield washer switch OFF	Measure the voltage to ground: There should be about 5 V.	Faulty windshield wiper/washer switch A short in the wire

*1: 4-door*2: 2-door