Toyota Tundra (2015 year). Manual — part 1254
P2103 (Case 2)
Motor driver IC high current limiter monitor input
Fail
CONFIRMATION DRIVING PATTERN
Connect the Techstream to the DLC3.
1.
Turn the ignition switch to ON and turn the Techstream on.
2.
Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
3.
Turn the ignition switch off and wait for at least 30 seconds.
4.
Turn the ignition switch to ON and turn the Techstream on [A].
5.
Start the engine.
6.
With the vehicle stationary, fully depress the accelerator pedal and quickly release it [B].
7.
Check that 16 seconds or more have elapsed from the instant when the accelerator pedal is first
depressed.
8.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
9.
Read the pending DTCs.
HINT:
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
10.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
11.
Input the DTC: P2102 or P2103.
12.
Check the DTC judgment result.
TESTER
DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
13.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2102,P2103; ...
HINT:
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [C] again.
If no pending DTC is output, perform a universal trip and check for permanent DTCs
.
HINT:
If a permanent DTC is output, the system is malfunctioning.
If no permanent DTC is output, the system is normal.
14.
FAIL-SAFE
and the throttle valve is returned to a 7° throttle angle by the return spring. The ECM then adjusts the engine
output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the
accelerator pedal opening angle to allow the vehicle to continue at a minimal speed. If the accelerator pedal is
depressed firmly and gently, the vehicle can be driven slowly.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the Techstream. Freeze frame data records 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.
The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor
Open Duty/Throttle Motor Close Duty) can be read using the Techstream. However, the ECM shuts off the
throttle actuator current when the ETCS malfunctions.
PROCEDURE
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2102,P2103; ...
OK
1.
INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (RESISTANCE OF THROTTLE
ACTUATOR)
(a) Disconnect the throttle with motor body assembly connector.
(b) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
2 (M+) - 1 (M-)
20°C (68°F)
0.3 to 100 Ω
HINT:
Perform "Inspection After Repair" after replacing the throttle with
motor body assembly
.
NG
REPLACE THROTTLE WITH MOTOR BODY
ASSEMBLY
2.
CHECK HARNESS AND CONNECTOR (THROTTLE WITH MOTOR BODY ASSEMBLY - ECM)
(a) Disconnect the throttle body connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
D9-2 (M+) - D74-19 (M+)
Always
Below 1 Ω
D9-1 (M-) - D74-18 (M-)
Always
Below 1 Ω
D9-2 (M+) or D74-19 (M+) - Body
ground
Always
10 kΩ or higher
D9-1 (M-) or D74-18 (M-) - Body
ground
Always
10 kΩ or higher
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2102,P2103; ...
OK
OK
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
3.
INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY
(a) Check for foreign objects between the throttle valve and the housing.
OK:
No foreign objects between throttle valve and housing.
HINT:
Perform "Inspection After Repair" after cleaning the throttle with motor body assembly
.
NG
REMOVE FOREIGN OBJECT AND CLEAN THROTTLE
WITH MOTOR BODY ASSEMBLY
4.
INSPECT THROTTLE VALVE
(a) Check if the throttle valve opens and closes smoothly.
OK:
Throttle valve opens and closes smoothly.
HINT:
Perform "Inspection After Repair" after replacing the throttle with motor body assembly
.
NG
REPLACE THROTTLE WITH MOTOR BODY
ASSEMBLY
OK
REPLACE ECM
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2102,P2103; ...
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