Toyota FJ Cruiser (GSJ 10, 15 series). Manual — part 43
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–127
ES
HINT:
TP#1 denotes THROTTLE POS #1, and TP#2 denotes
THROTTLE POS#2.
B
A
(a) Disconnect the B14 throttle with motor body connector.
(b) Disconnect the B1 ECM connector.
(c) Check the resistance.
Standard Resistance (Check for open)
Standard Resistance (Check for short)
(d) Reconnect the throttle with motor body connector.
(e) Reconnect the ECM connector.
NG
OK
0.5 to 1.1 V
2.1 to 3.1 V
3.3 to 4.9 V
4.6 to 5.0 V
TP sensor circuit
normal
B
TP#1 (VTA1)
When Accelerator
Pedal Released
TP#2 (VTA2)
When Accelerator
Pedal Released
TP#1 (VTA1)
When Accelerator
Pedal Depressed
TP#2 (VTA2)
When Accelerator
Pedal Depressed
Trouble Areas
Proceed To
Go to step 5
2
CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)
Wire Harness Side:
Front View
ECM Connector
B1
B14
Throttle with Motor Body Connector
E2
VC
VTA2
VTA
E2
VC
VTA2
VTA1
A116167E06
Tester Connections
Specified Conditions
VC (B14-5) - VC (B1-23)
Below 1
Ω
VTA (B14-6) - VTA1 (B1-20)
VTA2 (B14-4) - VTA2 (B1-19)
E2 (B14-3) - E2 (B1-28)
Tester Connections
Specified Conditions
VC (B14-5) or VC (B1-23) - Body grouB14nd
10 k
Ω or higher
VTA (B14-6) or VTA1 (B1-20) - Body ground
VTA2 (B14-4) or VTA2 (B1-19) - Body ground
REPAIR OR REPLACE HARNESS OR
CONNECTOR
ES–128
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Disconnect the B14 throttle with motor body connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage between the terminals of the B1
ECM connector.
Standard Voltage
(d) Reconnect the throttle with motor body connector.
NG
OK
Replace the throttle with motor body assembly (See page
).
NEXT
(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON and turn the tester ON.
(c) Clear DTCs (See page
(d) Start the engine.
(e) Allow the engine to idle for 15 seconds or more.
(f)
Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(g) Read DTCs.
Result
B
3
INSPECT ECM (VC VOLTAGE)
B14
Front View
ECM Connector
B1
Throttle with Motor Body Connector
Wire Harness Side:
E2 (-)
VC (+)
A116168E04
Tester Connections
Specified Conditions
VC (B1-23) - E2 (B1-28)
4.5 to 5.5 V
REPLACE ECM (See page
)
4
REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY
5
CHECK WHETHER DTC OUTPUT RECURS (THROTTLE POSITION SENSOR DTCS)
Display (DTC Output)
Proceed To
P0120, P0122, P0123, P0220, P0222, P0223 and/or P2135
A
No output
B
SYSTEM OK
ES–130
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
HINT:
This DTC relates to the Throttle Position (TP) sensor.
DESCRIPTION
Refer to DTC P0120 (See page
).
MONITOR DESCRIPTION
The ECM uses the TP sensor to monitor the throttle valve opening angle.
This sensor transmits two signals: VTA1 and VTA2. VTA1 is used to detect the throttle opening angle and
VTA2 is used to detect malfunctions in VTA1. The ECM performs several checks to confirm the proper
operation of the TP sensor and VTA1.
For each throttle opening angle, a specific voltage difference is expected between the outputs of VTA1
and VTA2. If the voltage output difference between the two signals deviates from the normal operating
range, the ECM interprets this as a malfunction of the TP sensor. The ECM illuminates the MIL and sets
the DTC.
If the malfunction is not repaired successfully, the DTC is set 2 seconds after the engine is next started.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
DTC
P0121
Throttle / Pedal Position Sensor / Switch "A"
Circuit Range / Performance Problem
DTC No.
DTC Detection Conditions
Trouble Areas
P0121
Difference between VTA1 and VTA2 voltages less than 0.8 V, or more
than 1.6 V for 2 seconds (1 trip detection logic)
•
TP sensor (built into throttle body)
Related DTCs
P0121: TP sensor rationality
Required Sensors/Components (Main)
TP sensor
Required Sensors/Components (Related)
-
Frequency of Operation
Continuous
Duration
Within 2 seconds
MIL Operation
Immediate
Sequence of Operation
None
Either of following conditions A or B is met
-
A. Ignition switch
ON
B. Electric throttle motor power
ON
TP sensor malfunction (P0120, P0122, P0123, P0220, P0222, P0223,
P2135)
Not detected
Either of following conditions is met
-
"Difference of TP sensor voltage between VTA1 and VTA2 x 0.8"
Higher than 1.6 V
"Difference of TP sensor voltage between VTA1 and VTA2 x 0.8"
Lower than 0.8 V
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