P2445

DTC P2444 SECONDARY AIR INJECTION SYSTEM PUMP STUCK ON BANK 1
DTC P2445 SECONDARY AIR INJECTION SYSTEM PUMP STUCK OFF BANK 1

CIRCUIT DESCRIPTION

DTC Detection Conditions:

To accelerate the activation of the Three-Way Catalytic Converter (TWC) when warming up the engine, the air injection system pumps secondary air to the exhaust manifold using pressure. The secondary air is supplied by the air pump and is pumped to the exhaust manifold through the air switching valve. The opening and closing movements of the air switching valve are regulated by the Vacuum Switching Valve (VSV).The air pump and air switching valve are monitored by the ECM and are used to detect malfunctions in this system.The ECM monitors the secondary air injection system and detects malfunctions using the pressure sensor located on the air switching valve.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

The ECM monitors the pressure in the secondary air passage using the pressure sensor located on the air switching valve of the secondary air injection system. The sensor measures the pressure in the secondary air passage and transmits a signal to the ECM.

If either of the following conditions occurs, the ECM interprets it as a malfunction of the secondary air injection system, and illuminates the MIL and sets a DTC:

- The pressure indicated by the pressure sensor does not reach a certain level despite the ECM turning on the air pump.
- The pressure indicated by the sensor exceeds threshold levels despite the ECM turning off the air pump.

Wiring Diagram:

INSPECTION PROCEDURE

Step 1:

Step 2-3:

Step 4-7:

Step 8-10:

Step 11:

Hand-held tester

HINT: It is possible to check the pressure in the secondary air passage using a hand-held tester.

Step 1-4:

Step 5-7:

Step 8-9:

Step 10:

OBD II scan tool (excluding the hand-held tester)