Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 77

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES–263

ES

OK:

Total of SHORT FT #1 and LONG FT #1, or SHORT
FT #2 and LONG FT #2 values is between -20 % and
20 %.

OK

NG

(a) Connect the intelligent tester to the DLC3.
(b) Start the engine and turn the tester ON.
(c) Warm up the engine.
(d) Select the following menu items: DIAGNOSIS /

ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1 and
VVT CTRL B2.

(e) Check the engine speed while operating the Oil Control

Valve (OCV) using the tester.

OK

NG

OK

OK:

PCV hose is connected correctly and is not damaged.

NG

OK

(a) Check the air induction system for vacuum leakage.

OK:

No leakage from air induction system.

NG

OK

(a) Visually check that the air cleaner filter element is not

excessively contaminated with dirt or oil.

Go to step 12

3

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE OCV)

Tester Operations

Specified Conditions

OCV OFF

Normal engine speed

OCV ON

Engine idles roughly or stalls (soon after OCV switched from OFF

to ON)

Go to step 8

4

CHECK PCV HOSE CONNECTIONS

Go to step 9

5

CHECK AIR INDUCTION SYSTEM

Go to step 10

6

CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

ES–264

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES

OK:

Air cleaner filter element is not excessively
contaminated with dirt or oil.

NG

OK

Replace the mass air flow meter (See page

ES-409

).

NEXT

NEXT

NEXT

NEXT

NEXT

(a) Check for deposits around the throttle valve and throttle

valve condition.
OK:

No deposits around throttle valve and throttle valve
moves smoothly.

NG

OK

Replace the ECM (See page

ES-446

).

NEXT

Go to step 11

7

REPLACE MASS AIR FLOW METER

Go to step 15

8

CHECK AND REPAIR VVT SYSTEM

Go to step 15

9

REPAIR OR REPLACE PCV HOSE

Go to step 15

10

REPAIR OR REPLACE AIR INDUCTION SYSTEM

Go to step 15

11

REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

Go to step 15

12

CHECK THROTTLE VALVE

Go to step 14

13

REPLACE ECM

Go to step 15

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES–265

ES

NEXT

NOTICE:
In this operation, the engine must be cold (the same level
as the engine coolant temperature recorded in the freeze
frame data).
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
(d) Clear DTCs (See page

ES-38

).

(e) Switch the ECM from normal mode to check mode using

the tester (See page

ES-42

).

(f)

Start the engine to idle for a minute.
OK:

Stable fast idling.

(g) Read DTCs.

OK:

No DTC output.

NEXT

14

REPAIR OR REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY

Go to step 15

15

CHECK WHETHER DTC OUTPUT RECURS (DTC P050A AND/OR P050B)

END

ES–266

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES

DESCRIPTION

The battery supplies electricity to the ECM even when the ignition switch is in the OFF position. This
power allows the ECM to store data such as DTC history, freeze frame data and fuel trim values. If the
battery voltage falls below a minimum level, these memories are cleared and the ECM determines that
there is a malfunction in the power supply circuit. When the engine is next started, the ECM illuminates
the MIL and sets the DTC.

HINT:
If DTC P0560 is set, the ECM does not store other DTCs.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

DTC

P0560

System Voltage

DTC No.

DTC Detection Conditions

Trouble Areas

P0560

Open in ECM back up power source circuit (1 trip detection
logic)

•

Open in back up power source circuit

•

EFI fuse

•

ECM

Related DTCs

P0560: ECM system voltage

Required Sensors/Components (Main)

ECM

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

3 seconds

MIL Operation

Immediate (MIL illuminated after next engine start)

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

Stand-by RAM

Initialized

ECM power source

Less than 3.5 V