Hint:
Sensor 1 refers to the sensor mounted in front of the three-way catalytic converter (twc) and located near the engine assembly.
Description
Refer to dtc p2195 (see page es-292).
Monitor description
After the engine is warmed up, the ecm performs air-fuel ratio feedback control to maintain the air-fuel ratio at the stoichiometric level. In addition, active a/f control is performed for approximately 10 seconds after the preconditions are met in order to measure the a/f sensor response rate. During active a/f control, the ecm forcibly increases and decreases the injection volume a certain amount, based on the stoichiometric air-fuel ratio learned during normal air-fuel ratio control, and measures the a/f sensor response rate. The ecm receives a signal from the a/f sensor while performing active a/f control and uses it to calculate the a/f sensor response rate deterioration level.
If the a/f sensor response rate deterioration level is less than the threshold, the ecm interprets this as a malfunction and sets the dtc.
Confirmation driving pattern
Hint:
Performing this confirmation pattern will activate the a/f sensor response monitor.
Hint:
Completion of all a/f sensor monitors is required to change the value in test result.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Monitor result
Refer to checking monitor status (see page es-17).
Wiring diagram
Inspection procedure
Hint:
Intelligent tester only: malfunctioning areas can be identified by performing the a/f control function provided in the active test. The a/f control function can help to determine whether the air-fuel ratio (a/f) sensor, heated oxygen (ho2) sensor and other potential trouble areas are malfunctioning.
The following instructions describe how to conduct the a/f control operation using the intelligent tester.
Hint:
Standard
Notice:
The a/f sensor has an output delay of a few seconds and the ho2 sensor has a maximum output delay of approximately 20 seconds.
Following the a/f control procedure enables technicians to check and graph the voltage outputs of both the a/f and ho2 sensors.
To display the graph, select the following menu items on the tester: diagnosis / enhanced obd ii / active test / a/f control / user data / afs b1 s1 and o2s b1 s2; and press the yes button and then the enter button followed by the f4 button.
Hint:
If any dtcs relating to the a/f sensor (dtcs for the a/f sensor heater or a/f sensor admittance) are output, troubleshoot those dtcs first.
High beam automatic turning on or off conditions
When all of the following conditions are fulfilled, high beam will be
automatically turned on:
Vehicle speed is above approximately 21 mph (34 km/h).
The area ahead of the vehicle is dark.
There are no oncoming or preceding vehicles with headlights or tail
lights turned on.
There are fe ...
Checking and replacing
fuses
If any of the electrical components do not operate, a fuse may
have blown. If this happens, check and replace the fuses as necessary.
Vehicles without a smart key system:
turn the engine switch to the “lock” position.
Vehicles with a smart key system:
turn the engine switch off.
Aft ...
Short to gnd in can bus line
(2005/11-2006/01)
Description
There may be a short circuit between the can bus line and gnd when there is
resistance between
terminals 6 (canh) and 4 (cg) or terminals 14 (canl) and 4 (cg) of the dlc3.
Wiring diagram
Inspection procedure
Notice:
Turn the ignition switch off b ...