M/T model

Turn the ignition switch ON (II).
Are the back-up lights on when the shift lever is not in reverse position?
1. YES -Inspect the back-up light switch.
2. NO -Go to step 2.
Shift the transmission to reverse gear.
Do the back-up lights come on ?
1. YES -Go to step 3.
2. NO -Go to step 4.
Measure voltage between ECM connector terminals B24and B20.

Fig 1: Measuring Voltage Between ECM Connector Terminals B24 And B20
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage ?
1. YES -The back-up light switch signal is OK.
2. NO -Repair open in the wire between the ECM (B24) and the back-up light switch.
Inspect the No. 27 (7.5 A) fuse in the under-dash fuse/relay box.
Is the fuse OK ?
1. YES -Repair open in the wire between the back-up light switch and the No. 27 (7.5 A) fuse. Inspect the back-up light switch.
2. NO -Repair short in the wire between the ECM (B24) and the No. 27 (7.5 A) fuse. Replace the No. 27 (7.5 A) fuse.