Toyota 2GR-FE Manual page 282

ES–126
P0037 and P0057:
Battery voltage
P0038 and P0058 (Case 1):
Battery voltage
Engine
Starter
P0038 and P0058 (Case 2):
Battery voltage
P0141 and P0161:
One of the following conditions is met:
A. All of the following conditions are met:
1. Battery voltage
ES
2. Fuel cut
3. Time after fuel cut ON to OFF
4. Accumulated heater ON time
5. Learned heater OFF current operation
B. Duration that rear heated oxygen sensor impedance is less than 15
kΩ
TYPICAL MALFUNCTION THRESHOLDS
P0037 and P0057:
Heater current
P0038 and P0058:
One of the following conditions is met:
A. Learned heater OFF current
B. Heater current
P0141 and P0161 (Heater performance monitor check):
Accumulated heater resistance
COMPONENT OPERATING RANGE
Heated Oxygen (HO2) sensor heater current
MONITOR RESULT
Refer to CHECKING MONITOR STATUS (See page ES-25).
WIRING DIAGRAM
Refer to DTC P0136 (See page ES-178).
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data
can be helpful in determining whether the vehicle was running or stopped, whether the engine was
warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of
a malfunction (See page ES-45).
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
10.5 to 20 V
10.5 V or more
Running
OFF
10.5 to 20 V
Condition A or B
Conditions 1, 2, 3, 4 and 5
10.5 V or more
OFF
30 seconds or more
100 seconds or more
Completed
2 seconds or more
Less than 0.3 A
Condition A or B
More than 2 A
2 A or more
Varies with sensor element temperature (Example: More than 23 ohm)
0.4 to 1 A (when engine idles, HO2 sensor warmed up and battery
voltage 11 to 14 V)