Toyota 2GR-FE Manual page 287

7
CHECK HARNESS AND CONNECTOR (HO2 SENSOR - ECM)
Wire Harness Side:
Heated Oxygen Sensor Connector
HT1B
C52
Bank 1
OX1B
HT2B
C51
Bank 2
OX2B
C55
ECM Connector
EX2B
HT1B
HT2B
EX1B
OX2B
OX1B
OK
8
CHECK WHETHER DTC OUTPUT RECURS
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) Turn the ignition switch on (IG).
(c) Measure the voltage according to the value(s) in the
table below.
Standard voltage
+B
E2
(d) Turn the engine switch off.
(e) Disconnect the C55 ECM connector.
(f) Measure the resistance according to the value(s) in the
+B
table below.
Standard resistance (Check for open)
E2
Standard resistance (Check for short)
HT1B (C52-1) or HT1B (C55-48) - Body ground
OX1B (C52-3) - OX1B (C55-88) - Body ground
E2 (C52-4) or EX1B (C55-65) - Body ground
HT2B (C51-1) or HT2B (C55-47) - Body ground
OX2B (C51-3) or OX2B (C55-87) - Body ground
A137615E06
E2 (C51-4) or EX2B (C55-64) - Body ground
(g) Reconnect the HO2 sensor connector.
(h) Reconnect the ECM connector.
NG
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch on (IG).
(c) Turn the intelligent tester on.
(d) Clear the DTCs (See page ES-45).
(e) Start the engine.
(f) Allow the engine to idle for 2 minutes.
Terminal Connection
+B (C52-2) - Body ground
+B (C51-2) - Body ground
Terminal Connection
HT1B (C52-1) - HT1B (C55-48)
OX1B (C52-3) - OX1B (C55-88)
E2 (C52-4) - EX1B (C55-65)
HT2B (C51-1) - HT2B (C55-47)
OX2B (C51-3) - OX2B (C55-87)
E2 (C51-4) - EX2B (C55-64)
Terminal Connection
REPAIR OR REPLACE HARNESS OR
CONNECTOR
ES–131
Specified Condition
9 to 14 V
9 to 14 V
ES
Specified Condition
Below 1 Ω
Below 1 Ω
Below 1 Ω
Below 1 Ω
Below 1 Ω
Below 1 Ω
Specified Condition
10 kΩ or higher
10 kΩ or higher
10 kΩ or higher
10 kΩ or higher
10 kΩ or higher
10 kΩ or higher