Wipers/Washers (MICU) Input Test
NOTE:
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. B5 (30 A)*2, No. B21 (15 A), and No. B29 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. C22 (15 A), No. C23 (10 A)*2, and No. C40 (10 A) fuses in the under-dash fuse/relay box are OK.
Before testing, make sure the No. D1-5 (30 A) and No. D15 (30 A)*1 fuses in the auxiliary under-dash fuse box are OK.

*1: Without keyless access system
*2: With keyless access system

1.
Turn the vehicle to the OFF (LOCK) mode.

2.
Disconnect under-dash fuse/relay box connectors B, D, H, N, Q, and T.

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
Q29*1
BLU
Vehicle ON mode
Connect terminal Q29 to body ground with jumper wire:
The windshield wiper motor should run at high speed.
Faulty windshield wiper intermittent relay
Faulty windshield wiper high/low relay
Faulty windshield wiper motor
Poor ground (G301) or an open in the ground wire
An open or high resistance in the wire
Q29*2
BLU
Vehicle ON mode
Connect terminals M2 and N20, and terminal Q29 to body ground with jumper wires:
The windshield wiper motor should run at high speed.
Faulty windshield wiper intermittent relay
Faulty windshield wiper high/low relay
Faulty windshield wiper motor relay
Faulty windshield wiper motor
Poor ground (G301) or an open in the ground wire
Poor ground (G302) or an open in the ground wire
An open or high resistance in the wire
Q24*1
PNK
Vehicle ON mode, run the windshield wiper motor by connecting terminal Q29 and body ground with jumper wire.
Connect terminal Q24 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 high/low relay
An open or high resistance in the wire
Q24*2
PNK
Vehicle ON mode, run the windshield wiper motor by connecting terminal Q29 and body ground with jumper wire.
Connect terminals M2 and N20, and terminal Q24 to body ground with jumper wires:
The windshield wiper motor speed should change from high speed to low speed.
Faulty windshield wiper motor
Faulty windshield wiper high/low relay
An open or high resistance in the wire
T4
·
T8
RED
·
PNK
Vehicle ON mode
Connect terminals T4 and R1, and terminal T8 to body ground with jumper wires:
The windshield/rear window washer motor should run.
Faulty windshield/rear window washer motor
An open or high resistance in the wire
Q39
WHT
Vehicle ON mode, run the windshield wiper motor by connecting terminal Q29 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
N40*1
BRN
Vehicle ON mode
Connect terminals M4 and M20, and terminal N40 to body ground with jumper wires:
The rear window wiper motor should run.
Faulty rear window wiper motor
An open or high resistance in the wire
Poor ground (G503) or an open in the ground wire
N40*2
BRN
Vehicle ON mode
Connect terminals M2 and M20, terminals R1 and H19, and terminal N40 to body ground with jumper wires:
The rear window wiper motor should run.
Faulty rear wiper motor relay
Faulty rear window wiper motor
Poor ground (G503) or an open in the ground wire
Poor ground (G403) or an open in the ground wire
An open or high resistance in the wire
*1: Without keyless access system
*2: With keyless access system

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
Q15
RED
In all power modes
Measure the voltage to ground:
There should be battery voltage.
Blown No. B29 (10 A) fuse in the under-hood fuse/relay box
An open or high resistance in the wire
H19*1
GRN
In all power modes
Measure the voltage to ground:
There should be battery voltage.
Blown No. C23 (10 A) fuse in the under-dash fuse/relay box
An open or high resistance in the wire
N20*1
WHT
Vehicle ON mode
Measure the voltage to ground:
There should be battery voltage.
Blown No. C40 (10 A) fuse in the under-dash fuse/relay box
An open or high resistance in the wire
D23
BLK
In 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
H1
BLK
In 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
N6
BLK
In 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
N38
BLK
In 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
Q11
LT GRN
Brake pedal pressed
Measure the voltage to ground:
There should be battery voltage.
Blown No. B6 (10 A) fuse in the under-hood fuse/relay box
Faulty brake pedal position switch
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
A short to power in the wire
B8
·
B20
TAN
·
BRN
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 wire
Windshield wiper/washer switch OFF
Measure the voltage to ground:
There should be about 5 V.
Faulty windshield wiper/washer switch
A short to ground in the wire
B15
·
B20
GRN
·
BRN
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 wire
Windshield wiper/washer switch OFF
Measure the voltage to ground:
There should be about 5 V.
Faulty windshield wiper/washer switch
A short to ground in the wire
B16
·
B20
WHT
·
BRN
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 wire
Windshield wiper/washer switch OFF
Measure the voltage to ground:
There should be about 5 V.
Faulty windshield wiper/washer switch
A short to ground in the wire
B9
·
B20
YEL
·
BRN
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 wire
Windshield washer switch OFF
Measure the voltage to ground:
There should be about 5 V.
Faulty windshield wiper/washer switch
A short to ground in the wire
B6
·
B20
LT BLU
·
BRN
Rear window wiper/washer switch (INT) 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 wire
Rear window wiper/washer switch (INT) ON
Measure the voltage to ground:
There should be about 5 V.
Faulty windshield wiper/washer switch
A short to ground in the wire
B17
·
B20
PNK
·
BRN
Rear window wiper/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 wire
Rear window wiper/washer switch OFF
Measure the voltage to ground:
There should be about 5 V.
Faulty windshield wiper/washer switch
A short to ground in the wire
B7
·
B20
BLU
·
BRN
Rear window 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 wire
Rear window washer switch OFF
Measure the voltage to ground:
There should be about 5 V.
Faulty windshield wiper/washer switch
A short to ground in the wire
Q22*2
RED
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
Q23*2
GRN
Transmission range switch in R
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 R
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: With keyless access system
*2: CVT