Toyota FJ Cruiser (GSJ 10, 15 series). Manual — part 75
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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ES
NG
(a) Disconnect the A3 stop light switch connector.
(b) Disconnect the E47 ECM connector.
(c) Check the resistance.
Standard Resistance (Check for open)
Standard Resistance (Check for short)
(d) Reconnect the stop light switch connector.
(e) Reconnect the ECM connector.
NG
OK
4
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - ECM)
A3
Front View
ECM Connector
Wire Harness Side:
Stop Light Switch Connector
E47
ST1-
STP
A116299E03
Tester Connections
Specified Conditions
Stop light switch (A3-1) - STP (E47-15)
Below 1
Ω
Stop light switch (A3-4) - ST1- (E47-16)
Tester Connections
Specified Conditions
Stop light switch (A3-1) or STP (E47-15) - Body
ground
10 k
Ω or higher
Stop light switch (A3-4) or ST1- (E47-16) - Body
ground
REPAIR OR REPLACE HARNESS OR
CONNECTOR
REPLACE ECM (See page
)
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DESCRIPTION
The idling speed is controlled by the ETCS (Electronic Throttle Control System). The ETCS is comprised
of: 1) the one valve type throttle body; 2) the throttle actuator, which operates the throttle valve; 3) the
Throttle Position (TP) sensor, which detects the opening angle of the throttle valve; 4) the Accelerator
Pedal Position (APP) sensor, which detects the accelerator pedal position; and 5) the ECM, which
controls the ETCS. Based on the target idling speed, the ECM controls the throttle actuator to provide the
proper throttle valve opening angle.
MONITOR DESCRIPTION
The ECM monitors the idling speed and idling air flow volume to conduct Idle Speed Control (ISC). The
ECM determines that the ISC system is malfunctioning if the following conditions apply:
•
The learned idling air flow volume remains at the maximum or minimum volume 5 times or more during
a drive cycle.
•
While driving at 6.25 mph (10 km/h) or more, the actual engine idling speed varies from the target idling
speed by between 100 rpm and 200 rpm, 5 times or more during a drive cycle.
Example:
If the actual idling speed varies from the target idling speed by more than 200 rpm
*
5 times during a drive
cycle, the ECM illuminates the MIL and sets the DTC.
*
: Threshold idling speed varies with engine load.
DTC
P0505
Idle Control System Malfunction
DTC No.
DTC Detection Conditions
Trouble Areas
P0505
Idling speed continues to vary greatly from target idling speed
(2 trip detection logic)
•
ETCS
•
Air induction system
•
PCV hose connection
•
ECM
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
Functional check:
TYPICAL MALFUNCTION THRESHOLDS
Functional check:
Related DTCs
P0505: ISC Function
Required Sensors/Components (Main)
ETCS
Required Sensors/Components (Related)
Crankshaft position sensor, Engine coolant temperature sensor, and Vehicle speed sensor
Frequency of Operation
Continuous
Duration
10 minutes
MIL Operation
2 driving cycles
Sequence of Operation
None
Monitor runs whenever following DTCs not present
None
Engine
Running
Either of following conditions 1 or 2 met
-
1. Frequency that following conditions (a) and (b) met
5 times or more
(a) Engine RPM - target engine RPM (A/C OFF and NSW OFF)
Below -100 rpm, or 150 rpm or more
(b) Vehicle condition
Stop after vehicle was driven by 6.25 mph (10 km/h) or more
2. Frequency that following conditions (c) and (d) met
Once
(c) Engine RPM - target engine RPM (A/C OFF and NSW OFF)
Below -100 rpm, or 150 rpm or more
(d) ISC airflow rate (learning value)
1.3 L/sec. or less, or 8.5 L/sec. or more
Time
Time
Small
Minimum
Maximum
0
Large
Idle Speed Learned Valve
Example
Idle Speed
Target RPM
Actual Idle RPM
A121611E01
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
INSPECTION PROCEDURE
HINT:
•
The following conditions may also cause DTC P0505 to be set:
(1) The floor carpet overlapping slightly onto the accelerator pedal, causing the accelerator pedal to
be slightly depressed and therefore the throttle valve position to be slightly open.
(2) The accelerator pedal being not fully released.
•
Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle
was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and
other data, from the time the malfunction occurred.
(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(e) Read DTCs.
Result
HINT:
If any DTCs other than P0505 are output, troubleshoot
those DTCs first.
B
A
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
1
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505)
Display (DTC Output)
Proceed To
P0505
A
P0505 and other DTCs
B
GO TO DTC CHART (See page
2
CHECK PCV HOSE CONNECTIONS
REPAIR OR REPLACE PCV HOSE
3
CHECK AIR INDUCTION SYSTEM
REPAIR OR REPLACE AIR INDUCTION
SYSTEM
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