With Automatic Wiper

WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

Remove the rain sensor cover (A).

Fig 1: Removing Rain Sensor Cover
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Disconnect the 10P connector (B) from the rain sensor/automatic wiper control unit (C).
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.

Reconnect the connector, and make these input tests at the connector.

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.

CONTROL UNIT INPUT TEST (WITH AUTOMATIC WIPER - CONNECTOR RECONNECTED)

Cavity

Wire

Test condition

Test: Desired result

Possible cause if result is not obtained

BLK

Under all conditions

Check for voltage to ground:
There should be less than 1 V.

Poor ground (G652⁽¹⁾ , G551⁽²⁾ )
An open in the wire

YEL

Ignition switch ON (II)

Check for voltage to ground:
There should be battery voltage.

Blown No. 9 (10 A) fuse in the driver's under-dash fuse/relay box
An open in the wire

RED

Ignition switch ON (II)

Check for voltage to ground:
There should be battery voltage.

Blown No. 12 (30 A) fuse in the driver's under-dash fuse/relay box
Faulty automatic wiper relay
An open in the wire

GRN

Ignition switch ON (II), and windshield wiper switch in INT

Check for voltage to ground:
There should be battery voltage.

Blown No. 11 (10 A) fuse in the driver's under-dash fuse/relay box
Faulty windshield wiper switch
An open in the wire

BLU/WHT

Ignition switch ON (II), and windshield wiper switch ON (LO)

Check for voltage to ground:
There should be about 0- 12 V, -0- 12 V alternately.

NOTE: Use an analog ohmmeter.

Blown No. 91 (7.5 A) fuse in the auxiliary fuse holder 2
Faulty windshield wiper motor
An open in the wire

BLK/YEL

Ignition switch ON (II), and windshield washer switch ON

Check for voltage to ground:
There should be battery voltage.

Blown No. 11 (10 A) fuse in the driver's under-dash fuse/relay box
Faulty windshield washer switch
Faulty windshield washer motor
An open in the wire

⁽¹⁾

'03 model

⁽²⁾	'04-'06 models

Disconnect the connector, and make these input tests at the connector.

If any test indicates a problem, find and correct the cause, then recheck the system.

If all the input tests prove OK, the control unit must be faulty; replace it.

CONTROL UNIT INPUT TEST (WITH AUTOMATIC WIPER - CONNECTOR DISCONNECTED)

Cavity	Wire	Test condition	Test: Desired result	Possible cause if result is not obtained
10	GRN/RED	Ignition switch ON (II)	Check for voltage to ground: There should be battery voltage.	Blown No. 12 (30 A) fuse in the driver's under-dash fuse/relay box Faulty wiper intermittent relay An open in the wire
10	GRN/RED	Ignition switch ON (II)	Attach to ground: The windshield wiper should run at low speed.	Faulty automatic wiper relay Faulty wiper intermittent relay Faulty wiper/washer switch Faulty windshield wiper motor Poorground (G201, G301) An open in the wire
6	GRN/YEL	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G401) Faulty wiper/washer switch An open in the wire