P0418-Secondary Air Injection System Control Circuit: Notes

Fig 1: Air Pump System Circuit Schematic

Courtesy of CHRYSLER LLC

1. When Monitored  : Once per driving cycle when the Engine is at idle, Air Pump was activated at start-up, Barometric Pressure greater than 78 kPa (11 psi), Engine Coolant Temperature is greater than 50°C (122°F), and no other DTCs.
2. Set Condition  : When the test is enabled, the O2 Sensor must increase by at least 23% (rich).

For a complete Powertrain Control Module Circuit Diagram, refer to SCHEMATICS AND DIAGRAMS .