Turn the ignition switch to LOCK (0).

Remove the driver's dashboard undercover, then remove the dashboard lower cover.

Disconnect driver's under-dash fuse/relay box connectors F, Q, and R.

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

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

With the connectors still disconnected, make these input tests at the connectors.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
Q1	BLK	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G502) An open in the wire
Q2	BRN	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G501) An open in the wire
R2	BRN	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G501) An open in the wire
R5	BLK	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G502) An open in the wire

Reconnect the connectors to the driver's under-dash fuse/relay box, turn the ignition switch to ON (II), and make these input tests at the connectors.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
F4(A/T)	GRN	Transmission range switch in P	Measure the voltage to ground: There should be less than 1 V.	Poor ground (G101) An open in the wire
		Transmission range switch in any other position than P	Measure the voltage to ground: There should be more than 5 V.	Faulty transmission range switch A short to power in the wire
F20	LT GRN	Brake pedal pressed	Measure the voltage to ground: There should be battery voltage.	Blown No. 10 (20 A) fuse in the under-hood fuse/relay box Faulty brake pedal position switch An open in the wire
		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
F30	YEL	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 4 (10 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box Faulty relay circuit board in the under-hood fuse/relay box A short to ground in the wire
F7	ORN	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 3-8 (WIP MTR) (30 A) fuse in the under-hood fuse/relay box Poor ground (G301) Faulty relay circuit board in the under-hood fuse/relay box An open in the wire
			Attach to ground: The wiper motor should run at high speed.	Poor ground (G301, G302) [G201] Faulty relay circuit board in the under-hood fuse/relay box Faulty wiper motor An open in the wire
F8	YEL/BLU	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 3-8 (WIP MTR) (30 A) fuse in the under-hood fuse/relay box An open in the wire

[ ]:

RHD model

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
R15 · R4	ORN · BLK	Wiper switch ON at INT or LO position	Measure the voltage between the R15 and the R4 terminals: There should be less than 1 V.	Faulty wiper/washer switch An open in the wire
		Wiper switch OFF	Measure the voltage between the R15 and the R4 terminals: There should be more than 5 V.	Faulty wiper/washer switch A short to ground in the wire
R16 · R4	WHT · BLK	Wiper switch ON at LO or HI position	Measure the voltage between the R16 and the R4 terminals: There should be less than 1 V.	Faulty wiper/washer switch An open in the wire
		Wiper switch OFF	Measure the voltage between the R16 and the R4 terminals: There should be more than 5 V.	Faulty wiper/washer switch A short to ground in the wire
R17 · R4	GRN · BLK	Wiper switch ON at MIST position	Measure the voltage between the R17 and the R4 terminals: There should be less than 1 V.	Faulty wiper/washer switch An open in the wire
		Wiper switch OFF	Measure the voltage between the R17 and the R4 terminals: There should be more than 5 V.	Faulty wiper/washer switch A short to ground in the wire
R18 · R4	YEL · BLK	Washer switch ON	Measure the voltage between the R18 and the R4 terminals: There should be less than 1 V.	Faulty wiper/washer switch An open in the wire
		Washer switch OFF	Measure the voltage between the R18 and the R4 terminals: There should be more than 5 V.	Faulty wiper/washer switch A short to ground in the wire
R1 · R4	BLU · BLK	Intermittent dwell timer turned	Check resistance between the R1 and R4 terminals: There resistance should vary between 0 to 1 kΩ.	Faulty wiper/washer switch An open in the wire

Turn the ignition switch to LOCK (0).

Remove the driver's dashboard undercover, then remove the dashboard lower cover.

Disconnect driver's under-dash fuse/relay box connectors F, Q, and R.

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

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

With the connectors still disconnected, make these input tests at the connectors.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
Q1	BLK	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G502) An open in the wire
Q2	BRN	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G501) An open in the wire
R2	BRN	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G501) An open in the wire
R5	BLK	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G502) An open in the wire

Reconnect the connectors to the driver's under-dash fuse/relay box, turn the ignition switch to ON (II), and make these input tests at the connectors.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
F4(A/T)	GRN	Transmission range switch in P	Measure the voltage to ground: There should be less than 1 V.	Poor ground (G101) An open in the wire
		Transmission range switch in any other position than P	Measure the voltage to ground: There should be more than 5 V.	Faulty transmission range switch A short to power in the wire
F20	LT GRN	Brake pedal pressed	Measure the voltage to ground: There should be battery voltage.	Blown No. 10 (20 A) fuse in the under-hood fuse/relay box Faulty brake pedal position switch An open in the wire
		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
F30	YEL	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 4 (10 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box Faulty relay circuit board in the under-hood fuse/relay box A short to ground in the wire
F7	ORN	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 3-8 (WIP MTR) (30 A) fuse in the under-hood fuse/relay box Poor ground (G301) Faulty relay circuit board in the under-hood fuse/relay box An open in the wire
			Attach to ground: The wiper motor should run at high speed.	Poor ground (G301, G302) [G201] Faulty relay circuit board in the under-hood fuse/relay box Faulty wiper motor An open in the wire
F8	YEL/BLU	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 3-8 (WIP MTR) (30 A) fuse in the under-hood fuse/relay box An open in the wire

[ ]:

RHD model

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
R15 · R4	ORN · BLK	Wiper switch ON at INT or LO position	Measure the voltage between the R15 and the R4 terminals: There should be less than 1 V.	Faulty wiper/washer switch An open in the wire
		Wiper switch OFF	Measure the voltage between the R15 and the R4 terminals: There should be more than 5 V.	Faulty wiper/washer switch A short to ground in the wire
R16 · R4	WHT · BLK	Wiper switch ON at LO or HI position	Measure the voltage between the R16 and the R4 terminals: There should be less than 1 V.	Faulty wiper/washer switch An open in the wire
		Wiper switch OFF	Measure the voltage between the R16 and the R4 terminals: There should be more than 5 V.	Faulty wiper/washer switch A short to ground in the wire
R17 · R4	GRN · BLK	Wiper switch ON at MIST position	Measure the voltage between the R17 and the R4 terminals: There should be less than 1 V.	Faulty wiper/washer switch An open in the wire
		Wiper switch OFF	Measure the voltage between the R17 and the R4 terminals: There should be more than 5 V.	Faulty wiper/washer switch A short to ground in the wire
R18 · R4	YEL · BLK	Washer switch ON	Measure the voltage between the R18 and the R4 terminals: There should be less than 1 V.	Faulty wiper/washer switch An open in the wire
		Washer switch OFF	Measure the voltage between the R18 and the R4 terminals: There should be more than 5 V.	Faulty wiper/washer switch A short to ground in the wire
R1 · R4	BLU · BLK	Intermittent dwell timer turned	Check resistance between the R1 and R4 terminals: There resistance should vary between 0 to 1 kΩ.	Faulty wiper/washer switch An open in the wire

Turn the ignition switch to LOCK (0), and remove the passenger's side kick panel.

Disconnect passenger's under-dash fuse/relay box connectors A, C, E, and H.

NOTE:

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

With the connectors still disconnected, make these input tests at the connectors.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A36	BLK	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G505) An open in the wire
A37
E15	BLK	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G201) [G302] An open in the wire
E16
H21	BLK	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G651) An open in the wire
A31	PNK	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 3 (15 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box An open in the wire
A35	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 Faulty driver's under-dash fuse/relay box An open in the wire
A25 *	ORN	Under all conditions	Attach to ground: The headlight washer motor should run.	Blown No. 11 (30 A) fuse in the under-hood fuse/relay box Poor ground (G201) Faulty headlight washer motor Faulty headlight washer motor relay
C3 *	PUR	Headlight washer switch pushed	Check for continuity to ground: There should be continuity.	Faulty headlight washer switch Poor ground (G501) An open in the wire
		Headlight washer switch released	Check for continuity to ground: There should be no continuity.	Faulty headlight washer switch A short to ground in the wire

*:	With headlight washer

[ ]:

RHD model

Reconnect the connectors to the passenger's under-dash fuse/relay box, and make these input test at the connector.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
E9	GRN[LT BLU]	Ignition switch ON (II)	Connect the A31 and E9 terminals with a jumper wire: The washer motor should run.	Poor ground (G651) Faulty washer motor Faulty passenger's under-dash fuse/relay box An open in the wire

[ ]:

RHD model

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

Turn the ignition switch to LOCK (0), and remove the passenger's side kick panel.

Disconnect passenger's under-dash fuse/relay box connectors A, C, E, and H.

NOTE:

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

With the connectors still disconnected, make these input tests at the connectors.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A36	BLK	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G505) An open in the wire
A37
E15	BLK	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G201) [G302] An open in the wire
E16
H21	BLK	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G651) An open in the wire
A31	PNK	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 3 (15 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box An open in the wire
A35	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 Faulty driver's under-dash fuse/relay box An open in the wire
A25 *	ORN	Under all conditions	Attach to ground: The headlight washer motor should run.	Blown No. 11 (30 A) fuse in the under-hood fuse/relay box Poor ground (G201) Faulty headlight washer motor Faulty headlight washer motor relay
C3 *	PUR	Headlight washer switch pushed	Check for continuity to ground: There should be continuity.	Faulty headlight washer switch Poor ground (G501) An open in the wire
		Headlight washer switch released	Check for continuity to ground: There should be no continuity.	Faulty headlight washer switch A short to ground in the wire

*:	With headlight washer

[ ]:

RHD model

Reconnect the connectors to the passenger's under-dash fuse/relay box, and make these input test at the connector.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
E9	GRN[LT BLU]	Ignition switch ON (II)	Connect the A31 and E9 terminals with a jumper wire: The washer motor should run.	Poor ground (G651) Faulty washer motor Faulty passenger's under-dash fuse/relay box An open in the wire

[ ]:

RHD model

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