Test 28: Malfunction Indicator Problem

Ground instrument panel connector "C" terminal NO. 9 and turn ignition on. If light does not illuminate, check wiring between instrument panel connector "C" terminal No. 9 and ECM. Check ECM. If wiring and ECM are okay, check light bulb. Replace as needed and retest. If light illuminates, replace circuit plate and retest. If problem still exists, replace power source unit.