Toyota Tundra. Manual — part 1392

TYPICAL MALFUNCTION THRESHOLDS

P0455 (pattern 1):

TYPICAL MALFUNCTION THRESHOLDS - P0455 (PATTERN 1)

P0455 (pattern 2):

TYPICAL MALFUNCTION THRESHOLDS - P0455 (PATTERN 2)

P0456:

TYPICAL MALFUNCTION THRESHOLDS - P0456

MONITOR RESULT

Refer to CHECKING MONITOR STATUS .

DTC P0500 VEHICLE SPEED SENSOR "A"

DESCRIPTION

The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid
control ECU converts these wheel speed signals into a 4-pulse signal and outputs it to the ECM via the
combination meter. The ECM determines the vehicle speed based on the frequency of these pulse signals.

Fig. 171: Vehicle Speed Sensor Signals

DTC DETECTION CONDITION AND TROUBLE AREA

IAT

4.4 to 40°C (40 to 104°F)

EVAP pressure when vacuum introduction complete

Higher than reference pressure x 0.2

EVAP pressure when vacuum introduction complete

Higher than reference pressure x 0.2

EVAP pressure when vacuum introduction
complete

Between reference pressure and reference pressure x
0.2

DTC

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

MONITOR DESCRIPTION

The ECM assumes that the vehicle is being driven when the indicated vehicle speed is more than 9 km/h (5.6
mph). If there is no speed signal from the combination meter despite these conditions being met, the ECM
interprets this as a malfunction in the speed signal circuit. The ECM then illuminates the MIL and sets the DTC.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

Code

DTC Detection Condition

Trouble Area

P0500

While vehicle being driven, no vehicle speed sensor signal
transmitted to ECM
(2 trip detection logic)



Open or short in speed signal
circuit



Wheel speed sensor



Combination meter



ECM



Skid control ECU

Related DTCs

P0500: vehicle speed sensor "A" pulse input error

Required
Sensors/Components
(Main)

Vehicle Speed Sensor (VSS), Combination meter and Skid control ECU

Required
Sensors/Components
(Related)

Park/Neutral Position (PNP) switch, Engine Coolant Temperature (ECT)
sensor, Crankshaft Position (CKP) sensor, Throttle Position (TP) sensor and
Mass Air Flow (MAF) meter

Frequency of Operation

Continuous

Duration

5 seconds

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs not present

P0120 - P0223, P2135 (TP sensor)

Time after ignition switch off to ON

3 seconds or more

Transfer neutral switch*1

Not "N" position

Vehicle speed

9 km/h (5.6 mph) or more

Battery voltage

8 V or higher

Starter

OFF

HINT:
*1: Only for 4WD specification vehicle

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

WIRING DIAGRAM

Fig. 172: Combination Meter - 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.

1. CHECK OPERATION OF SPEEDOMETER

a. Drive the vehicle and check whether the operation of the speedometer in the combination meter is

normal.

HINT:



The vehicle speed sensor is operating normally if the speedometer reading is normal.



If the speedometer does not operate, check it by following the procedure described in
Speedometer Malfunction. (See SPEEDOMETER MALFUNCTION ).

NG : GO TO MALFUNCTION IN SPEEDOMETER . (See SPEEDOMETER MALFUNCTION )

OK : Go To Next Step

2. READ VALUE USING TECHSTREAM (VEHICLE SPD)

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON.

c. Turn the Techstream ON.

Vehicle speed sensor signal

No pulse input

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

d. Enter the following menus: Powertrain/Engine and ECT/Data List/All Data/Vehicle Speed.

e. Drive the vehicle.

f. Read the value displayed on the Techstream.

OK: Vehicle speeds displayed on Techstream and speedometer display are equal.

NG : Go to step 3

OK : CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT
PROBLEMS )

3. CHECK COMBINATION METER ASSEMBLY (+S VOLTAGE)

a. Disconnect the J28 combination meter connector.

b. Turn the ignition switch to ON.

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Fig. 173: Identifying Combination Meter Connector Terminal

NG : Go to step 5

OK : Go To Next Step

4. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM)

a. Move the shift lever to the neutral position.

b. Jack up the vehicle.

c. Turn the ignition switch to ON.

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

Tester Connection

Switch Condition Specified Condition

J28-35 (+S) - Body ground Ignition switch ON

4.5 to 5.5 V

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra