Wipers/Washers (MICU) Input Test
NOTE:
Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
Before testing, make sure the No. A12-7 (30 A), No. A12-8 (30 A) and No. A21 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. B5 (7.5 A), No. B12 (7.5 A) and No. B30 (15 A) fuses in the under-dash fuse/relay box are OK.

1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

2.
NOTE: All connector views are shown from the wire side of the female terminals.
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
E22
PUR
Under all conditions
Connect terminals E19 and E23, and terminal E22 to body ground with jumper wires:
The windshield wiper motor should run at high speed.
Faulty windshield wiper motor relay
Faulty windshield wiper intermittent relay
Faulty windshield wiper motor
Poor ground (G301) or an open in the ground wire
An open or high resistance in the wire
N9
·
N11
BLU
·
BRN
Windshield wiper/washer switch (Intermittent dwell time controller) turned ON.
Measure the resistance between terminals N9 and N11:
The resistance should vary between 0 to 1 k?.
Faulty windshield wiper/washer switch
An open or high resistance in the ground wire
A short to ground in the wire
E29
LT BLU
Run the windshield wiper motor by connecting terminals E19 and E23, and terminal E22 and body ground with jumper wire.
Connect terminal E29 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 relay circuit board
An open or high resistance in the wire
F7
GRY
Under all conditions
Connect terminals F6 and F7 with jumper wires:
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
E28
WHT
Run the windshield wiper motor by connecting terminals E19 and E23, and terminal E22 and body ground with jumper wire.
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

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
D16
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 (G601)
An open or high resistance in the ground wire
E7
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 (G401)
An open or high resistance in the ground wire
D30
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 (G601)
An open or high resistance in the ground wire
P1
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
F6
LT GRN
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A12-7 (30 A) fuse in the under-hood fuse/relay box
Faulty under-hood fuse/relay box
An open or high resistance in the wire
E23
WHT
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A21 (10 A) fuse in the under-hood fuse/relay box
Faulty under-hood fuse/relay box
An open or high resistance in the wire
E8
LT GRN*1
YEL*2
Brake pedal pressed
Measure the voltage to ground:
There should be battery voltage.
Blown No. A6 (10 A) fuse in the under-hood fuse/relay box
Faulty brake pedal position switch
Faulty brake light relay*2
An open or high resistance in the wire
Brake pedal released
Measure the voltage to ground:
There should be no voltage.
Faulty brake pedal position switch
Faulty brake light relay*2
A short to power in the wire
N3
·
N11
TAN
·
BRN
Windshield wiper/washer switch (INT or LO) ON
Measure the voltage between terminals N3 and N11:
There should be less than 0.2 V.
Faulty windshield wiper/washer switch
An open or high resistance in the wire
Windshield wiper/washer switch OFF
Measure the voltage between terminals N3 and N11:
There should be about 5 V.
Faulty windshield wiper/washer switch
A short to ground in the wire
N13
·
N11
GRN
·
BRN
Windshield wiper/washer switch (MIST) ON
Measure the voltage between terminals N13 and N11:
There should be less than 0.2 V.
Faulty windshield wiper/washer switch
An open or high resistance in the wire
Windshield wiper/washer switch OFF
Measure the voltage between terminals N13 and N11:
There should be about 5 V.
Faulty windshield wiper/washer switch
A short to ground in the wire
N2
·
N11
WHT
·
BRN
Windshield wiper/washer switch (LO or HI) ON
Measure the voltage between terminals N2 and N11:
There should be less than 0.2 V.
Faulty windshield wiper/washer switch
An open or high resistance in the wire
Windshield wiper/washer switch OFF
Measure the voltage between terminals N2 and N11:
There should be about 5 V.
Faulty windshield wiper/washer switch
A short to ground in the wire
N12
·
N11
YEL
·
BRN
Windshield washer switch ON
Measure the voltage between terminals N12 and N11:
There should be less than 0.2 V.
Faulty windshield wiper/washer switch
An open or high resistance in the wire
Windshield washer switch OFF
Measure the voltage between terminals N12 and N11:
There should be about 5 V.
Faulty windshield wiper/washer switch
A short to ground in the wire
E17*
GRY
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
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
*1: Without ACC
*2: With ACC
*3: A/T, CVT