Toyota 2GR-FE Manual page 278

ES–122
7
CHECK HARNESS AND CONNECTOR
Wire Harness Side:
A/F Sensor Connector
: Bank 1
C15
: Bank 2
C35
ES
C55 ECM Connector
A1A+
A1A-
A2A+
A2A-
OK
8
CHECK WHETHER DTC OUTPUT RECURS
Result
Display (DTC Output)
No output
P0031, P0032, P0051 and/or P0052
A
CHECK FOR INTERMITTENT PROBLEMS
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
HA1A
HA2A
A127715E19
(a) Disconnect the C15 or C35 A/F sensor connector.
(b) Disconnect the C55 ECM connector.
(c) Measure the resistance between the terminals.
Standard resistance (Check for open)
Tester Connection
HA1A (C55-86) - HA1A (C15-1)
HA2A (C55-109) - HA2A (C35-1)
Standard resistance (Check for short)
Tester Connection
HA1A (C55-86) or HA1A (C15-1) - Body ground
HA2A (C55-109) or HA2A (C35-1) - Body ground
(d) Reconnect the ECM connector.
(e) Reconnect the A/F sensor connectors.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
(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 1 minute or more.
(g) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(h) Read the DTCs.
Proceed to
A
B
B REPLACE ECM (See page ES-518)
Specified Condition
Below 1 Ω
Below 1 Ω
Specified Condition
10 kΩ or higher
10 kΩ or higher