Toyota 2GR-FE Manual page 283

1
INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE)
Component Side:
Heated Oxygen Sensor
+B
C52
Bank 1
E2
+B
C51
Bank 2
E2
OK
2
CHECK TERMINAL VOLTAGE (+B OF HO2 SENSOR)
Wire Harness Side:
Heated Oxygen Sensor Connector
C52
Bank 1
C51
Bank 2
NG
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
(a) Disconnect the C52 heated oxygen sensor connector
(Bank 1 Sensor 2) or C51 heated oxygen sensor
connector (Bank 2 Sensor 2).
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance (Bank 1 sensor 2)
HT1B
Tester Connection
HT1B (1) - +B (2)
HT1B (1) - E2 (4)
OX1B Standard resistance (Bank 2 sensor 2)
Tester Connection
HT2B (1) - +B (2)
HT2B (1) - E2 (4)
HT2B
(c) Reconnect the HO2 sensor connector.
NG
OX2B
A137614E06
(a) Disconnect the C52 heated oxygen sensor connector
(Bank 1 Sensor 2) or C51 heated oxygen sensor
connector (Bank 2 Sensor 2).
(b) Turn the ignition switch on (IG).
(c) Measure the voltage between the terminals.
Standard voltage
Tester Connection
+B
+B (C52-2) - Body ground
+B (C51-2) - Body ground
(d) Reconnect the HO2 sensor connector.
OK
+B
A137619E01
Condition
20°C (68°F)
Always
Condition
20°C (68°F)
Always
REPLACE HEATED OXYGEN SENSOR (See
page EC-20)
Go to step 7
ES–127
Specified Condition
11 to 16 Ω
10 kΩ or higher
ES
Specified Condition
11 to 16 Ω
10 kΩ or higher
Specified Condition
9 to 11 V
9 to 11 V