Toyota Tundra. Manual — part 1231

OK : Go to next step.

4. INSPECT AIR INJECTION CONTROL DRIVER (Dl TERMINAL VOLTAGE)

a. Disconnect the D55 or D51 AID connector.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

NG : REPLACE ECM (See REMOVAL )

Fig. 186: Identifying D55 Or D51 AID Connector Terminals

OK : Go to next step.

5. REPLACE AIR INJECTION CONTROL DRIVER

Tester Connection

Switch Condition

Specified Condition

D55-2 (DI) - D55-1 (E) Ignition switch ON 11 to 14 V (near battery voltage)

D51-2 (DI2) - D51-1 (E2) Ignition switch ON 11 to 14 V (near battery voltage)

2008 Toyota Tundra

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

a. Replace the air injection control driver. (See ).AIR INJECTION DRIVER

6. CONFIRM WHETHER DTC OUTPUT RECURS

a. Start the engine and warm it up.

b. Turn the ignition switch OFF.

c. Connect the Techstream to the DLC3.

d. Turn the ignition switch ON and turn the Techstream ON.

e. Clear DTCs (See DTC CHECK/CLEAR ).

f. Enter the following menus: Powertrain/Engine and ECT/Utility/Air injection check/Automatic

Mode.

g. Start the engine after the Techstream initialization is finished.

h. Perform the System Check operation by pressing Enter.

i. After operating the AIR system, press the Enter button to confirm the AIR system pending codes.

j. Read DTCs.

Result

RESULT CHART

k. Turn the ignition switch OFF.

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

A : END

DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW; DTC P2103 THROTTLE
ACTUATOR CONTROL MOTOR CIRCUIT HIGH

DESCRIPTION

The throttle actuator is operated by the ECM and opens and closes the throttle valve using gears. The opening
angle of the throttle valve is detected by the Throttle Position (TP) sensor, which is mounted on the throttle
body. The TP sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the
throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.

Display (DTC Output) Proceed To

No output

A

Other DTCs

B

NOTE:



When performing the Air Injection Check operation after the
battery cable has been reconnected, wait for 7 minutes with the
ignition switch turned to ON or the engine running.



Turn the ignition switch OFF when the Air Injection Check
operation finishes.

2008 Toyota Tundra

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

HINT:

This ETCS (Electronic Throttle Control System) does not use a throttle cable.

DTC TROUBLE DETECTION CONDITION CHART

MONITOR DESCRIPTION

The ECM monitors the electrical current through the electronic actuator, and detects malfunctions and open
circuits in the throttle actuator based on this value. If the current is outside the standard range, the ECM
determines that there is a malfunction in the throttle actuator. In addition, if the throttle valve does not function
properly (for example, stuck on), the ECM determines that there is a malfunction. The ECM then illuminates
the MIL and sets a DTC.

Example:

When the electrical current is more than 7 A, or less than 0.5 A and the throttle actuator duty ratio exceeds 80%,
the ECM interprets this as the current being outside the standard range, and illuminates the MIL and sets a
DTC.

If the malfunction is not repaired successfully, a DTC is set when the engine is quickly revved to a high RPM
several times after the engine has idled for 5 seconds after engine start.

MONITOR STRATEGY

MONITOR STRATEGY

DTC

No.

DTC Detection Condition

Trouble Area

P2102

Conditions (a) and (b) continue for 2.0 seconds (1 trip
detection logic):

a. Throttle actuator duty ratio 80% or more

b. Throttle actuator current 0.5 A or less



Open in throttle actuator
circuit



Throttle actuator



ECM

P2103

Either of following conditions is met (1 trip detection logic):



Hybrid IC diagnosis signal fail



Hybrid IC current limiter port fail



Short in throttle actuator
circuit



Throttle actuator



Throttle valve



Throttle body assembly



ECM

Related DTCs

P2102: Throttle actuator current (low current)
P2103: Throttle actuator current (high current)

Required Sensors/Components (Main)

Throttle actuator (throttle body)

Required Sensors/Components (Related)

None

Frequency of Operation

Continuous

P2102: 2 seconds

2008 Toyota Tundra

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

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

P2102:

TYPICAL ENABLING CONDITIONS

P2103:

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

P2102:

TYPICAL MALFUNCTION THRESHOLDS

P2103:

TYPICAL MALFUNCTION THRESHOLDS

FAIL-SAFE

When either of these DTCs, as well as other DTCs relating to ETCS (Electronic Throttle Control System)

Duration

P2103: 0.6 seconds

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs are not present

None

Throttle actuator

ON

Duty-cycle ratio to open throttle actuator

80% or more

Throttle actuator power supply

8 V or more

Motor current change during latest 0.016 seconds

Less than 0.2 A

Throttle actuator

ON

Either of the following conditions 1 or 2 is met:

-

1. Throttle actuator power supply

8 V or more

2. Throttle actuator power

ON

Battery voltage

8 V or more

Starter

OFF

Throttle actuator current

Less than 0.5 A

Either of following conditions is met:

A or B

A. Hybrid IC diagnosis signal

Fail

B. Hybrid IC current limiter port

Fail

2008 Toyota Tundra

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