Adaptive Cruise Control Symptom Troubleshooting - Adaptive cruise control (ACC) activation indicator (green) does not come on

Adaptive cruise control (ACC) activation indicator (green) does not come on Do the gauge control module self-diagnostic function. Is the gauge control module OK?
YES | - | Go to Step 2 .
NO | - | Substitute a known-good gauge control module and recheck. If the problem goes away, replace the original gauge control module. ■
Test the adaptive cruise control (ACC) combination switch. Is the switch OK?
YES | - | Go to Step 3 .
NO | - | Replace the adaptive cruise control (ACC) combination switch. ■
Turn the ignition switch ON (II). Check for voltage between the adaptive cruise control (ACC) combination switch 20P connector No. 13 terminal and body ground. Is there about 5 V?
YES | - | Repair an open in the wire between the adaptive cruise control (ACC) combination switch and body ground.■
NO | - | Repair an open in the wire between the adaptive cruise control (ACC) combination switch and the gauge control module. ■