Troubleshooting 8. When complete, turn ignition remove jumper wire, and recap the diagnostic reader connector. As an example, if an engine had an active DTC 18 and stored DTC 53, the flashing sequence would be: flash three times...short pause...flash two times...long pause...flash one time...short pause...flash eight times...long pause...flash three times...short pause...flash three times...long pause...flash five times...short pause...flash three times. OURGP12,00001EA –19–11MAR03–2/2 45-21 021604 PN=215