P2445
DTC P2445 SECONDARY AIR INJECTION SYSTEM PUMP STUCK OFF BANK 1CIRCUIT DESCRIPTION
DTC Detection Condition:
The secondary air injection 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), Air Switching Valve No.2 (ASV No.2) (ASV1, 2), pressure sensor and air injection driver (AID). The Air Switching Valve (ASV) (EASV) is an electromagnetic type and Air Switching Valve No.2 (ASV No.2) (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 ASV No.2. The ASV assists the ASV No.2. The ASV No.2 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 Malfunction Thresholds:
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 below the criteria the ECM stores the DTC and illuminates the MIL.
MONITOR RESULT
Refer to "Monitors, Trips and/or Drive Cycle" for detailed information.
The test value and test limit information are described as shown in the table. Check the monitor result and test values after performing the monitor drive pattern (refer to "Confirmation Monitor").
- MID (Monitor Identification Data) is assigned to each emissions-related component.
- TID (Test Identification Data) is assigned to each test value.
- Scaling is used to calculate the test value indicated on generic OBD II scan tools. Secondary air injection (AIR) system.
Wiring Diagram:
Step 1:
Step 2:
Step 3 - 4:
Step 5 - 6:
Step 7:
Step 8:
Step 9:
Step 10:
INSPECTION PROCEDURE
HINT: To check the pressure condition in the secondary air passage, the hand-held tester is available.
CHECK FOR INTERMITTENT PROBLEMS
HINT:
Hand-held tester only:
Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect when the ECM is in check mode with a hand-held tester. In check mode, the ECM uses 1 trip detection logic, which has a higher sensitivity to malfunctions than normal mode (default) using 2 trip detection logic.
a. Clear the DTCs.
b. Switch the hand-held tester from normal mode to check mode.
c. Perform a simulation test.
d. Check the connector(s) and terminal(s).
e. Wiggle the harness(s) and connector(s).