Control Unit Input Test: Windshield

Before testing the wiper/washer control functions, troubleshoot the multiplex control system (see TROUBLESHOOTING ).
Driver's Multiplex Control Unit
Remove the driver's multiplex control unit from the driver's under-dash fuse/relay box, and disconnect its connector.
Inspect all connector and socket terminals to-be sure they are 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.
  DRIVER'S UNDER-DASH FUSE/RELAY BOX SOCKET (Driver's multiplex control unit connector A)
  
  Fig 1: Identifying Driver's Multiplex Control Unit Connector Terminals
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
  
  DRIVER'S MULTIPLEX CONTROL UNIT CONNECTOR B
  
  Fig 2: Identifying Driver's Multiplex Control Unit Connector Terminals
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
  
  : Canada

With the driver's multiplex control unit still disconnected, make these input tests at the connector and driver's under-dash fuse/relay box sockets.

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

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

RESULT REFERENCE CHART (DRIVER'S MULTIPLEX CONTROL UNIT DISCONNECTED)

Cavity

Wire

Test condition

Test: Desired result

Possible cause if result is not obtained

B11⁽²⁾

BLK

Under all conditions

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

Poor ground (G501)
An open in the wire

Fuse/relay box socket

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
Faulty driver's under-dash fuse/relay box

A22

Shift lever in P position

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

Faulty transmission range switch
Poor ground (G101)
An open in the wire

A17

Brake pedal pressed

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

Blown No. 47 (20 A) fuse in the under-hood fuse/relay box
Faulty brake pedal position switch
An open in the wire

B14 ⁽¹⁾

BLU/WHT

Under all conditions

Check for voltage between the B14 terminal and No. 9 terminal of the PCM 32P connector A: There should be less than 1 V.

An open in the wire

B15 ⁽¹⁾

GRN/RED [GRN/PUR]

Parking brake pedal pressed

Check for continuity to ground: There should be continuity.

Faulty parking brake switch
An open in the wire

B9⁽¹⁾

GRN/YEL

Intermittent dwell time control ring turned

Check resistance between the terminals: It should vary from 0 to approx. 30 kohm as the ring is turned.

Faulty intermittent dwell time controller
An open in the wire

B10 ⁽¹⁾

GRN/WHT

A16

Fuse/relay box socket

Ignition switch ON (II) and wiper switch at INT

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 switch
Faulty driver's under-dash fuse/relay box
An open in the wire

A14

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 windshield wiper intermittent wiper relay
Faulty driver's under-dash fuse/relay box
An open in the wire

Ignition switch ON (II) and washer switch ON

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 washer switch
Faulty driver's under-dash fuse/relay box
An open in the wire

Ignition switch ON (II) and wiper switch in the PARK position

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 motor
Faulty driver's under-dash fuse/relay box
An open in the wire

[ ] :Canada

⁽¹⁾	Driver's multiplex control unit connector B

⁽²⁾	Make this test at driver's multiplex control unit connector B with all connectors reconnected