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DTC P0031, P0032 HO2S1 HEATER
EC-141
[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.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure EBS010MQ
1. CHECK HO2S1 POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 1 harness connector.
3. Turn ignition switch ON.
4. Check voltage between HO2S1 terminal 4 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
TER-
MINAL
NO.
WIRE
COLOR
ITEM CONDITION DATA (DC Voltage)
24 G/W
Heated oxygen sen-
sor 1 heater
[Engine is running]
● Warm-up condition.
● Engine speed is below 3,600 rpm
Approximately 7.0V
[Engine is running]
● Engine speed is above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
PBIB0519E
PBIB0500E
Voltage: Battery voltage
PBIB0541E
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