h6: Check Injector Driver Signal
| Steps | _Key Off
_Breakout box installed _Connect processor to breakout box For EFI: Connect test lamp between Test Pin 37 and Test Pin 58 at the breakout box Connect test lamp between Test Pin 37 and Test Pin 59 at the breakout box For SEFI: Connect test lamp between Test Pin 37 and the suspect injectors Test Pin at the breakout box For CFI: Connect test lamp between Test Pin 37 and Test Pin 58 at the breakout box. Crank or start engine |
| Result | Is glow on lamp dim? |
| Direction | YES
For 5.0L SEFI: Remove breakout box. Reconnect processor. GO to Section 4 for injector testing and cleaning instructions. After any servicing, rerun Quick Test and Cylinder Balance Test For all other engines, GO to Continue NO NO Light: Verify 12 volt battery at Test Pins 37 and 57 Bright Light: Check injector circuit for shorts to ground If OK, remove breakout box. Replace processor. Rerun Quick Test |
| Notes | Properly operating systems will show a dim glow on the lamp |