DTC P0137, P0157 HO2S2
EC-293
C
D
E
F
G
H
I
J
K
L
M
A
EC
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure
NBS000WZ
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten two ground screws on the body. Refer to
EC-159, "Ground Inspection"
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
6
BR/W
Heated oxygen sensor 2
heater (bank 2)
[Engine is running]
●
Engine speed: Below 3,600 rpm after the
following conditions are met.
–
Engine: After warming up
–
Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load.
0 - 1.0V
[Ignition switch: ON]
●
Engine stopped
[Engine is running]
●
Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
55
R/Y
Heated oxygen sensor 2
(bank 2)
[Engine is running]
●
Revving engine from idle to 3,000 rpm
quickly after the following conditions are
met.
–
Engine: After warming up
–
Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load.
0 - Approximately 1.0V
78
B/Y
Sensor ground
(Heated oxygen sensor)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
PBIB2192E