MICU Input Test (2016-17)
WARNING: This page is about a different variant/trim than selected.
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 - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks (2013-15), or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks (2016-17) .
1. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
2. Disconnect under-dash fuse/relay box connectors D, E, P, and R .
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 below.
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 below.
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| R9 | BLU | Disconnect the gauge control module connector A (32P) | Check for continuity between terminal R9 and gauge control module connector A (32P) terminal No. 31: There should be continuity. | An open in the B-CAN wire |
| R10 | PNK | Check for continuity between terminal R10 and gauge control module connector A (32P) terminal No. 30: There should be continuity. | ||
| R9 | BLU | Disconnect climate control unit 32P connector | Check for continuity between terminal R9 and climate control unit 32P connector terminal No. 30: There should be continuity. | An open in the B-CAN wire |
| R10 | PNK | Check for continuity between terminal R10 and climate control unit 32P connector terminal No. 32: There should be continuity. | ||
| R9*1 | BLU | Disconnect the power window master switch 37P connector | Check for continuity between terminal R9 and power window master switch 37P connector terminal No. 30: There should be continuity. | An open in the B-CAN wire |
| R10*1 | PNK | Check for continuity between terminal R10 and power window master switch 37P connector terminal No. 28: There should be continuity. | ||
| R9*2 | BLU | Disconnect the automatic lighting control unit/sensor 7P connector | Check for continuity between terminal R9 and automatic lighting control unit/sensor 7P connector terminal No. 7: There should be continuity. | An open in the B-CAN wire |
| R10*2 | PNK | Check for continuity between terminal R10 and automatic lighting control unit/sensor 7P connector terminal No. 6: There should be continuity. | ||
| R9*3 | BLU | Disconnect the automatic lighting/rain sensor 5P connector | Check for continuity between terminal R9 and automatic lighting/rain sensor 5P connector terminal No. 3: There should be continuity. | An open in the B-CAN wire |
| R10*3 | PNK | Check for continuity between terminal R10 and automatic lighting/rain sensor 5P connector terminal No. 4: There should be continuity. | ||
| R9*4 | BLU | Disconnect audio unit connector A (24P) | Check for continuity between terminal R9 and audio unit connector A (24P) terminal No. 2: There should be continuity. | An open in the B-CAN wire |
| R10*4 | PNK | Check for continuity between terminal R10 and audio unit connector A (24P) terminal No. 4: There should be continuity. |
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| R9*5 | BLU | Disconnect audio unit connector B (20P) | Check for continuity between terminal R9 and audio unit connector B (20P) terminal No. 3: There should be continuity. | An open in the B-CAN wire |
| R10*5 | PNK | Check for continuity between terminal R10 and audio unit connector B (20P) terminal No. 13: There should be continuity. | ||
| R9*6 | BLU | Disconnect audio-navigation unit connector B (20P) | Check for continuity between terminal R9 and audio-navigation unit connector B (20P) terminal No. 3: There should be continuity. | An open in the B-CAN wire |
| R10*6 | PNK | Check for continuity between terminal R10 and audio-navigation unit connector B (20P) terminal No. 13: There should be continuity. | ||
| R9*7 | BLU | Disconnect the power seat control unit connector B (20P) | Check for continuity between terminal R9 and power seat control unit connector B (20P) terminal No. 17: There should be continuity. | An open in the B-CAN wire |
| R10*7 | PNK | Check for continuity between terminal R10 and power seat control unit connector B (20P) terminal No. 16: There should be continuity. | ||
| R9*8 | BLU | Disconnect the immobilizer control unit 7P connector | Check for continuity between terminal R9 and immobilizer control unit 7P connector terminal No. 5: There should be continuity. | An open in the B-CAN wire |
| R10*8 | PNK | Check for continuity between terminal R10 and immobilizer control unit 7P connector terminal No. 4: There should be continuity | ||
| R9*9 | BLU | Disconnect keyless access control unit connector B (28P) | Check for continuity between terminal R9 and keyless access control unit connector B (28P) terminal No. 7: There should be continuity. | An open in the B-CAN wire |
| R10*9 | PNK | Check for continuity between terminal R10 and keyless access control unit connector B (28P) terminal No. 6: There should be continuity. | ||
| R9*10 | BLU | Disconnect Auto high-beam control unit 6P connector | Check for continuity between terminal R9 and Auto high-beam control unit 6P connector terminal No. 3: There should be continuity. | An open in the B-CAN wire |
| R10*10 | PNK | Check for continuity between terminal R10 and Auto high-beam control unit 6P connector terminal No. 2: There should be continuity. |
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| R9*11 | BLU | Disconnect Parking and back-up sensor control unit 24P connector | Check for continuity between terminal R9 and Parking and back-up sensor control unit 24P connector terminal No. 10: There should be continuity. | An open in the B-CAN wire |
| R10*11 | PNK | Check for continuity between terminal R10 and Parking and back-up sensor control unit 24P connector terminal No. 22: There should be continuity. | ||
| R9*12 | BLU | Disconnect wireless charger 7P connector | Check for continuity between terminal R9 and wireless charger 7P connector terminal No. 2: There should be continuity. | An open in the B-CAN wire |
| R10*12 | PNK | Check for continuity between terminal R10 and wireless charger 7P connector terminal No. 3: There should be continuity. | ||
| R12 | LT BLU | Under all conditions | Check for continuity between terminal R12 and data link connector (DLC) terminal No. 7: There should be continuity. | An open in the K-LINE wire |
*1: With door multiplex control unit
*2: With automatic lighting without automatic wiper
*3: With automatic lighting and automatic wiper
*4: Without display audio
*5: Without navigation with display audio
*6: With navigation
*7: With DPMS
*8: Without keyless access system
*9: With keyless access system
*10: With auto high-beam
*11: With parking back-up sensor
*12: With wireless charger
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 |
|---|---|---|---|---|
| E23 | WHT | Under all conditions | Measure the voltage to ground: There should be battery voltage. |
|
| D30 | BLK | In all ignition switch positions or all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
|
| P1 | BLK | In all ignition switch positions or all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
|