DTC B11C7: Passenger's MICU IG1 Line Input Error

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A )

Before troubleshooting, check if the No. 12 (7.5 A) fuse in the driver's under-dash fuse/relay box is OK

Clear the DTCs with the HDS
Turn the ignition switch to LOCK (0) and then back to ON (II), or press the engine start/stop button to select the OFF mode and then the ON mode
Wait for at least 6 seconds
Check for DTCs with the HDS

Is DTC B11C7 indicated?

YES -Go to step 5

NO -Intermittent failure, the system is OK at this time Check for loose or poor connections If the connections are good, check the battery condition (see BATTERY TEST ) and the charging system

Check the DTCs with the HDS

Is DTC B11C7 indicated with DTC U1282?

YES -Go to DTC U1282 troubleshooting

NO -Go to step 6

Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode
Measure the voltage between the passenger's under-dash fuse/relay box connector A (38P) terminal No 35 and body ground

Fig 1: Measuring Voltage Between Passenger's Under-Dash Fuse/Relay Box Connector A (38P) Terminal And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Faulty passenger's MICU, substitute a known-good passenger's under-dash fuse/relay box and recheck

NO -Check for an open in the BRN wire between the driver's under-dash fuse/relay box and the passenger's under-dash fuse/relay box