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.

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

2.
Disconnect the following connectors.

Under-dash fuse/relay box connector B (44P)
Under-dash fuse/relay box connector D (32P)
Under-dash fuse/relay box connector K (12P)
Under-dash fuse/relay box connector Q (16P)
Under-dash fuse/relay box connector W (24P)

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
K1
BLU
Disconnect the gauge control module connector A (32P)
Check for continuity between terminal K1 and gauge control module connector A (32P) terminal No. 31:
There should be continuity.
An open in the B-CAN wire
K2
PNK
Check for continuity between terminal K2 and gauge control module connector A (32P) terminal No. 30:
There should be continuity.
K1*1
BLU
Disconnect the climate control unit 32P connector
Check for continuity between terminal K1 and climate control unit 32P connector terminal No. 15:
There should be continuity.
An open in the B-CAN wire
K2*1
PNK
Check for continuity between terminal K2 and climate control unit 32P connector terminal No. 16:
There should be continuity.
K1
BLU
Disconnect the multi-information display unit connector A (32P)
Check for continuity between terminal K1 and multi-information display unit connector A (32P) terminal No. 15:
There should be continuity.
An open in the B-CAN wire
K2
PNK
Check for continuity between terminal K2 and multi-information display unit connector A (32P) terminal No. 31:
There should be continuity.
K1*2
BLU
Disconnect the power window master switch 37P connector
Check for continuity between terminal K1 and power window master switch 37P connector terminal No. 30:
There should be continuity.
An open in the B-CAN wire
K2*2
PNK
Check for continuity between terminal K2 and power window master switch 37P connector terminal No. 28:
There should be continuity.
K1*3
BLU
Disconnect the immobilizer-keyless control unit 7P connector
Check for continuity between terminal K1 and immobilizer-keyless control unit 7P connector terminal No. 5:
There should be continuity.
An open in the B-CAN wire
K2*3
PNK
Check for continuity between terminal K2 and immobilizer-keyless control unit 7P connector terminal No. 4:
There should be continuity.
K1*4
BLU
Disconnect the keyless access control unit connector B (24P)
Check for continuity between terminal K1 and keyless access control unit connector B (24P) terminal No. 7:
There should be continuity.
An open in the B-CAN wire
K2*4
PNK
Check for continuity between terminal K2 and keyless access control unit connector B (24P) terminal No. 6:
There should be continuity.
K1*5
BLU
Disconnect the automatic lighting/rain sensor 5P connector
Check for continuity between terminal K1 and automatic lighting/rain sensor 5P connector terminal No. 3:
There should be continuity.
An open in the B-CAN wire
K2*5
PNK
Check for continuity between terminal K2 and automatic lighting/rain sensor 5P connector terminal No. 4:
There should be continuity.
K1*6
BLU
Disconnect the automatic lighting control unit/sensor 7P connector
Check for continuity between terminal K1 and automatic lighting control unit/sensor 7P connector terminal No. 7:
There should be continuity.
An open in the B-CAN wire
K2*6
PNK
Check for continuity between terminal K2 and automatic lighting control unit/sensor 7P connector terminal No. 6:
There should be continuity.
Q6*7
BLU
Disconnect the power seat control unit connector B (40P)
Check for continuity between terminal Q6 and power seat control unit connector B (40P) terminal No. 22:
There should be continuity.
An open in the B-CAN wire
Q5*7
PNK
Check for continuity between terminal Q5 and power seat control unit connector B (40P) terminal No. 21:
There should be continuity.
K1*8
BLU
Disconnect the power tailgate control unit connector A (14P)
Check for continuity between terminal K1 and power tailgate control unit connector A (14P) terminal No. 2:
There should be continuity.
An open in the B-CAN wire
K2*8
PNK
Check for continuity between terminal K2 and power tailgate control unit connector A (14P) terminal No. 1:
There should be continuity.
K1*9
BLU
Disconnect the audio unit connector B (20P)
Check for continuity between terminal K1 and audio unit connector B (20P) terminal No. 3:
There should be continuity.
An open in the B-CAN wire
K2*9
PNK
Check for continuity between terminal K2 and audio unit connector B (20P) terminal No. 13:
There should be continuity.
K1*10
BLU
Disconnect the audio unit connector C (20P)
Check for continuity between terminal K1 and audio unit connector C (20P) terminal No. 3:
There should be continuity.
An open in the B-CAN wire
K2*10
PNK
Check for continuity between terminal K2 and audio unit connector C (20P) terminal No. 13:
There should be continuity.
K1*11
BLU
Disconnect the audio-navigation unit connector C (20P)
Check for continuity between terminal K1 and audio-navigation unit connector C (20P) terminal No. 3:
There should be continuity.
An open in the B-CAN wire
K2*11
PNK
Check for continuity between terminal K2 and audio-navigation unit connector C (20P) terminal No. 13:
There should be continuity.
Q14
LT BLU
Under all conditions
Check for continuity between terminal Q14 and data link connector (DLC) terminal No. 7:
There should be continuity.
An open in the K LINE wire
*1: With climate control unit
*2: With door multiplex control unit
*3: Without keyless access system
*4: With keyless access system
*5: With automatic lighting and automatic wiper
*6: With automatic lighting and without automatic wiper
*7: With DPMS
*8: With power tailgate
*9: Without navigation and display audio
*10: Without navigation and with display audio
*11: With navigation and display audio

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
D17
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A29 (10 A) fuse in the under-hood fuse/relay box
An open or high resistance in the wire
B20
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 (G604)
An open or high resistance in the ground wire
B32
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 (G604)
An open or high resistance in the ground wire
D10
BRN
In all ignition switch positions or all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G402)
An open or high resistance in the ground wire
W6
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