DTC B1080: Power Supply Circuit (IG1 Line) Input Error for Relay Control Module and MICU

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2014 Honda Ridgeline, 2013 Honda Ridgeline, 2012 Honda Ridgeline, 2011 Honda Ridgeline, and 2010 Honda Ridgeline. 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 ).

Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0) and then back to ON (II).
Check for DTCs with the HDS.
Is DTC B1080 indicated?

YES -Go to step 4.

NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections. ■
Check the MICU IG1 power supply No. 21 (7.5 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?

YES -Go to step 5.

NO -Replace the fuse and recheck for DTCs. ■
Turn the ignition switch to LOCK (0).
Disconnect under-hood fuse/relay box connector J (10P), and inspect for loose or bent pins. If the terminals are bent, loose or corroded, repair them as necessary and recheck the system.
Reconnect under-hood fuse/relay box connector J (10P).
Turn the ignition switch to ON (II).
Measure the voltage between under-hood fuse/relay box connector J (10P) terminal No. 2 and body ground.

Fig 1: Measuring Voltage Between Under-Hood Fuse/Relay Box Connector J (10P) Terminal No. 2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 10.

NO -Repair an open in the wire or high resistance in the wire. ■
Measure the voltage between under-hood fuse/relay box connector J (10P) terminals No. 9 and No. 10 and body ground.

Fig 2: Measuring Voltage Between Under-Hood Fuse/Relay Box Connector J (10P) Terminals No. 9 And No. 10 And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.2 V?

YES -Faulty relay control module; replace the under-hood fuse/relay box (see REMOVAL AND INSTALLATION ). ■

NO -Repair an open or high resistance in the wire or poor ground (G202). ■