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Multiplex Integrated Control System MICU Input Test




Multiplex Integrated Control System MICU Input Test

NOTE: Before testing, troubleshoot the multiplex integrated control system first, using B-CAN System Diagnosis Test Mode A. Troubleshooting - B-CAN System Diagnosis Test Mode A

Driver's MICU

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

2. Remove the driver's dashboard undercover. Driver's Dashboard Undercover Removal/Installation

3. Disconnect driver's under-dash fuse/relay box connectors F, N, P, Q, and R.
NOTE: All connector views are wire side of female terminals.

4. Inspect the connector 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 look OK, go to step 5.

5. With the connectors still disconnected, do these input tests at the following connectors.
- 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 6.





*1: Without keyless access system

*2: With keyless access system









*1: With navigation system

*2: Without navigation system

*3: With AcuraLink

6. Reconnect the connectors to the driver's under-dash fuse/relay box, and do these input tests at the following connectors.
- 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 7.

NOTE: These are power and ground tests for the driver's MICU.










Passenger's MICU

7. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, and remove the passenger's kick panel. Interior Trim Removal/Installation - Front Door Sill Area

8. Disconnect passenger's under-dash fuse/relay box connectors A and E.
NOTE: All connector views are wire side of female terminals.

9. Inspect the connector 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 look OK, go to step 10.

10. Reconnect the connectors to the passenger's under-dash fuse/relay box, turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, and do these input tests at the following connectors.
- 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 11.





11. If multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box (includes the driver's MICU). Driver's Under-Dash Fuse/Relay Box (MICU) Removal/Installation If input failures are related to a particular control unit, replace the control unit.





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