Checking the CHECK ENGINE lamp(MIL)
Checking the CHECK ENGINE lamp (MIL) |
2. |
The CHECK ENGINE lamp should light up when the control module
grounds pin 21 if a diagnostic trouble code has been
generated, or always when the ignition is switched on.
Measure the voltage across pins 37 and 21 on the BOB. Battery voltage should be present when the ignition is switched on. If not, see Control Module Replacement. |