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(P0410) SECONDARY AIR INJECTION SYSTEM (CONTINUED) When Monitored and Set Condition • When Monitored: Once per driving cycle with the engine at idle, air conditioning is off, barometric pressure is • Set Condition: When the test is enabled, the O2 Sensor must increase by at least 23% (rich). POSSIBLE CAUSES AIR PUMP VOLTAGE SUPPLY CIRCUIT OPEN AIR PUMP VOLTAGE SUPPLY CIRCUIT SHORT TO GROUND AIR PUMP GROUND CIRCUIT OPEN CRACKING, MISSING, MISROUTED, OR PLUGGED VACUUM LINES. AIR PUMP SWITCHOVER VALVES AIR PUMP RELAY AIR PUMP POWERTRAIN CONTROL MODULE For a complete Powertrain Control Module Circuit Diagram, (Refer to 9 - ENGINE - SCHEMATICS AND DIA- Diagnostic Test 1. PRE-DIAGNOSTIC CHECK OUT Note: Always perform diagnostics with a fully charged battery. Note: Check connectors — Clean/repair as necessary. Poor pin to Note: Check for applicable TSBs related to the problem. With the DRB III T , read PCM DTCs. Using the wiring diagram/schematic as a guide, inspect the wiring and Perform this procedure prior to symptom diagnosis. Continue Go To 2 ZH ENGINE - ELECTRICAL DIAGNOSTICS 9 - 425 |