Toyota 2GR-FE Manual page 457

TYPICAL MALFUNCTION THRESHOLDS
P050A:
Accumulated mass air flow
P050B:
Accumulated time when ignition timing retard is cut off
INSPECTION PROCEDURE
HINT:
Read freeze frame data using an 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).
1
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050A AND/OR P050B)
Result
Display (DTC Output)
P050A and/or P050B
P050A and/or P050B and other DTCs
A
2
READ VALUE USING INTELLIGENT TESTER (FUEL TRIM)
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch on (IG).
(c) Turn the tester on.
(d) Select the following the menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(e) Read the DTCs.
HINT:
If any DTCs other than P050A and P050B are output,
troubleshoot those DTCs first.
B
HINT:
Calculate the total fuel trim values to check the characteristic
deviation of the mass air flow meter.
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch on (IG).
(c) Turn the tester on.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / PRIMARY / SHORT
FT #1 and LONG FT #1.
(e) Read the values displayed on the tester.
(f) Add together the SHORT FT #1 and LONG FT #1 values
to obtain the total FUEL TRIM.
Varies with ECT (Example: Less than 42.5 g)
5 seconds or more
Proceed to
GO TO DTC CHART (See page ES-63)
ES–301
A
B
ES