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DTC P0037, P0038 HO2S2 HEATER
EC-151
[QR (WITH EURO-OBD)]
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 BBS001B0
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
Refer to EC-135, "
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)
2PU/R
Heated oxygen sensor 2
heater
[Engine is running]
● Engine speed is below 3,600 rpm after the follow-
ing 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 is above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
PBIB2021E
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