Toyota 2GR-FE Manual page 359

1 CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0171, P0172, P0174 OR
P0175)
Result
Display (DTC Output)
P0171, P0172, P0174 or P0175
P0171, P0172, P0174 or P0175 and other DTCs
A
2
CHECK PCV HOSE CONNECTIONS
OK
3
CHECK AIR INDUCTION SYSTEM
OK
4
PERFORM ACTIVE TEST BY INTELLIGENT TESTER (A/F CONTROL)
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch on (IG) and turn the tester on.
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(d) Read the DTCs.
HINT:
If any DTCs other than P0171, P0172, P0174 or P0175
are output, troubleshoot those DTCs first.
B
OK:
PCV hose is connected correctly and is not damaged.
NG
(a) Check the air induction system for vacuum leakage.
OK:
No leakage from the air induction system.
NG
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine and turn the tester on.
(c) Warm up the engine at an engine speed of 2,500 rpm for
approximately 90 seconds.
(d) Select the following menu items on the tester:
DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / A/F
CONTROL.
(e) Perform the A/F CONTROL operation with the engine in
an idling condition (press the RIGHT or LEFT button to
change the fuel injection volume).
Proceed to
GO TO DTC CHART (See page ES-63)
REPAIR OR REPLACE PCV HOSE
REPAIR OR REPLACE AIR INDUCTION
SYSTEM
ES–203
A
B
ES