Toyota Celica 2005 Repair Manual page 827

DI−628
DTC P2444
DTC P2445
CIRCUIT DESCRIPTION
Refer to DTC P2430 on page DI−611.
DTC No.
The secondary air pressure is more than 2.5 kPa (19 mmHg)
P2444
despite the ECM ordering the air pump to turn off
The secondary air pressure is less than 2.5 kPa (19 mmHg)
P2445
despite the ECM ordering the air pump to turn on
MONITOR DESCRIPTION
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 has not reached a certain level despite the ECM turning on the air pump,
or if the pressure level exceeds the threshold 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.
MONITOR STRATEGY
Related DTCs
Required sensors/components
Frequency of operation
Duration
MIL operation
Sequence of operation
DIAGNOSTICS
Secondary Air Injection System Pump Stuck
On Bank 1
Secondary Air Injection System Pump Stuck
Off Bank 1
DTC Detection Condition
Pressure sensor
Continuous
2 min.
2 driving cycles
None
− ENGINE (2ZZ−GE)
S Short in air pump circuit
S Pressure sensor
S Air pump assembly
S Open or short in pressure sensor circuit
S ECM
S Air pump fuse
S Vacuum hose
S Air pump assembly
S Open in air pump circuit
S Secondary air injection system piping
S Pressure sensor
S Open or short in pressure sensor circuit
S ECM
P2444
P2445
826
Trouble Area
Air pump stuck ON
Air pump stuck OFF
DIC7W−02