Precaution for Supplemental Restraint System (SRS)
"AIR BAG" and "SEAT BELT PRE-TENSIONER"P0138 HO2S2
DTC Logic
DTC DETECTION LOGIC
The heated oxygen sensor 2 has a much longer switching time between rich and
lean than the air fuel ratio (A/
F) sensor 1. The oxygen storage capacity of the three way catalyst (manifold)
causes the longer switching
time.
MALFUNCTION A
To judge the malfunction ...
Exhaust valve timing control
EXHAUST VALVE TIMING CONTROL : System
Description
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Engine speed and piston position
Exhaust valve
timing control
Exhaust valve timing ...
System
SRS air bag system
SRS AIR BAG SYSTEM : System Diagram
SRS AIR BAG SYSTEM : System Description
The air bag deploys if the air bag diagnosis sensor unit is activated
while the ignition switch is in the ON or
START position.
The collision modes for which supplemental restraint systems ...