Toyota Tundra. Manual — part 1235

TESTER CONNECTION SPECIFIED CONDITION

Fig. 193: Checking Harness & Connector (ECM - ETCS Fuse, ETCS Fuse - Battery)

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : Go to next step.

Tester Connection

Condition Specified Condition

Positive battery cable - ETCS fuse (1) Always

Below 1 ohms

Tester Connection

Condition Specified Condition

Positive battery cable or ETCS fuse (1) - Body ground Always

10 kohms or higher

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

6. INSPECT ECM (+BM VOLTAGE)

a. Disconnect the D74 ECM connector.

b. Measure the voltage according to the value (s) in the table below.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (TERMINAL E1 - BODY
GROUND)

Fig. 194: Identifying D74 ECM Connector Terminals

OK : REPLACE ECM (See REMOVAL )

DTC P2119 THROTTLE ACTUATOR CONTROL THROTTLE BODY RANGE/PERFORMANCE

SYSTEM DESCRIPTION

The Electronic Throttle Control System (ETCS) is composed of the throttle actuator, Throttle Position (TP)
sensor, Accelerator Pedal Position (APP) sensor, and ECM. The ECM operates the throttle actuator to regulate
the throttle valve in response to driver inputs. The TP sensor detects the opening angle of the throttle valve, and
provides the ECM with feedback so that the throttle valve can be appropriately controlled by the ECM.

DTC TROUBLE DETECTION CONDITION CHART

Tester Connection

Condition Specified Condition

D74-41 (+BM) - D74-81 (E1) Always

11 to 14 V

DTC

No.

DTC Detection Condition

Trouble

Area

P2119

Throttle valve opening angle continues to vary greatly from target opening angle



ETCS

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

MONITOR DESCRIPTION

The ECM determines the actual opening angle of the throttle valve from the TP sensor signal. The actual
opening angle is compared to the target opening angle commanded by the ECM. If the difference between these
two values is outside the standard range, the ECM interprets this as a malfunction in the ETCS. The ECM then
illuminates the MIL and sets the DTC.

If the malfunction is not repaired successfully, the DTC is set when the accelerator pedal is quickly released (to
close the throttle valve) after the engine speed reaches 5000 RPM by fully depressing the accelerator pedal
(fully open the throttle valve).

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

(1 trip detection logic)



ECM

Related DTCs

P2119: ETCS malfunction

Required Sensors/Components (Main)

Throttle actuator

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

1 second

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs are not present

None

System guard*

ON

*System guard set when following conditions are met:

-

Throttle actuator

ON

Throttle actuator duty calculation

Executing

TP sensor

Fail determined

Throttle actuator current-cut operation

Not executing

Throttle actuator power supply

4 V or more

Throttle actuator

Fail determined

Either of following conditions A or B is met

-

A. Commanded closed TP - current closed TP

0.3 V or more for 1 second

B. Commanded open TP - current open TP

0.3 V or more for 0.6 seconds

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

FAIL-SAFE

When this DTC, as well as other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, is
set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and
the throttle valve is returned to a 6° 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 running 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

Refer to DTC P2102 .

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.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2119)

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the Techstream ON.

d. Enter the following menus: Powertrain/Engine and ECT/Trouble Codes.

e. Read DTCs.

Result

RESULT CHART

HINT:

If any DTCs other than P2119 are output, troubleshoot those DTCs first.

B : GO TO DTC CHART (See DIAGNOSTIC TROUBLE CODE CHART )

A : Go to next step.

2. CHECK WHETHER DTC OUTPUT RECURS (DTC P2119)

Display (DTC Output) Proceed To

P2119

A

P2119 and other DTCs

B

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra