Toyota 2GR-FE Manual page 365

13
CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM)
Wire Harness Side:
Air Fuel Ratio Sensor Connector
C15
Bank 1
C35
Bank 2
C55 ECM Connector
A1A-
A2A+
A1A+
A2A-
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
(a) Disconnect the C15 or C35 A/F sensor connector.
(b) Turn the ignition switch on (IG).
(c) Measure the voltage between the +B terminal of the A/F
sensor connector and body ground.
Standard voltage
(d) Turn the ignition switch off.
(e) Disconnect the C55 ECM connector.
(f) Measure the resistance.
Standard resistance (Check for open)
HA1A
HA2A
A127715E14
Standard resistance (Check for short)
HA1A (C15-1) or HA1A (C55-86) - Body ground
A1A+ (C15-3) or A1A+ (C55-93) - Body ground
A1A- (C15-4) or A1A- (C55-116) - Body ground
HA2A (C35-1) or HA2A (C55-109) - Body ground
A2A+ (C35-3) or A2A+ (C55-120) - Body ground
A2A- (C35-4) or A2A- (C55-119) - Body ground
(g) Reconnect the ECM connector.
(h) Reconnect the A/F sensor connector.
Tester Connections
+B (C15-2) - Body ground
+B (C35-2) - Body ground
Tester Connections
HA1A (C15-1) - HA1A (C55-86)
A1A+ (C15-3) - A1A+ (C55-93)
A1A- (C15-4) - A1A- (C55-116)
HA2A (C35-1) - HA2A (C55-109)
A2A+ (C35-3) - A2A+ (C55-120)
A2A- (C35-4) - A2A- (C55-119)
Tester Connections
ES–209
Specified Conditions
9 to 14 V
9 to 14 V
ES
Specified Conditions
Below 1 Ω
Below 1 Ω
Below 1 Ω
Below 1 Ω
Below 1 Ω
Below 1 Ω
Specified Conditions
10 kΩ or higher
10 kΩ or higher
10 kΩ or higher
10 kΩ or higher
10 kΩ or higher
10 kΩ or higher