P2444
DTC P2444 Secondary Air Injection System Pump Stuck On Bank1DTC P2445 Secondary Air Injection System Pump Stuck Off Bank1
DESCRIPTION
DTC Detection Condition:
The Secondary Air Injection (AI) system pumps air to the exhaust port to accelerate the activation of the catalyst. The secondary air injection system consists of the ECM, air pump, Air Switching Valve (ASV) (EASV), No. 2 Air Switching Valve (No. 2 ASV) (ASV1, 2), pressure sensor and Air Injection Control Driver (AID). The Air Switching Valve (ASV) (EASV) is an electromagnetic type and No. 2 Air Switching Valve (No. 2 ASV)(ASV1, 2) is a vacuum type.
The secondary air injection system pumps pressurized air to the exhaust port by the air pump through the ASV and No. 2 ASV. The ASV assists the No. 2 ASV. The No. 2 ASV also controls air supply.
The ECM sends signals to the AID, and then the AID operates the air pump and ASV. The pressure sensor detects pressure and exhaust pulsation in the system when the system operates and when it does not operate, and sends the data to the ECM.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions:
Typical Enabling Conditions (Part 2):
Typical Malfunction Thresholds:
P2444: The ECM observes the pressure in the secondary air passage using the pressure sensor located on the air switching valve in the secondary air injection system. The sensor measures the pressure in the secondary air passage and sends a signal to the ECM.
If the pressure level from the sensor exceeds a certain level despite the ECM turning off the air pump, the ECM interprets this as a fault in the secondary air injection system and sets a DTC.
P2445: The ECM calculates the amount of air flow within the secondary air system based on the output values of the pressure sensor and mass air flow meter.
The ECM determines whether the amount of air flow is normal or not according to the calculated value. When the amount of air flow is the criteria, the ECM stores the DTC and illuminates the MIL.
MONITOR RESULT
Refer to CHECKING MONITOR STATUS. Mode 6 Data
Wiring Diagram:
Step 1:
Step 1(Continued)-2:
Step 3-4:
Step 5-6:
Step 7-8:
Step 8(Continued)-9:
Step 10:
INSPECTION PROCEDURE
HINT: Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.