Toyota Tacoma (2015-2018) Service Manual: Data List / Active Test
DATA LIST / ACTIVE TEST
1. READ DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.
NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / (desired system) / Data List.
(f) According to the display on the Techstream, read the Data List.
(g) Using the Techstream, confirm the Data List items to help determine the cause of the problem.
NOTICE:
- The steering lock ECU (steering lock actuator or UPR bracket assembly) communicates with the Techstream through the certification ECU (smart key ECU assembly) which uses CAN communication. If the CAN communication system or certification ECU (smart key ECU assembly) is malfunctioning, Data List items may not be normal.
- When using the Techstream with the engine switch off, connect the Techstream to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Shift P Signal |
Shift position (P) signal / ON or OFF |
ON: Shift lever in P OFF: Shift lever not in P |
|
|
Steering Unlock Switch |
State of steering unlock sensor signal output from steering lock ECU (steering lock actuator or UPR bracket assembly) / ON or OFF |
ON: Steering unlocked OFF: Steering locked |
This item can be used to determine the cause of problems when the steering does not lock or unlock. HINT:
|
|
Str Lock/ Unlock Wait T-Out |
Steering lock or unlock malfunction / Yes or No |
Yes: Steering lock/unlock timed out (Lock bar stuck, etc.) No: Steering locks/ unlocks normally within specified time |
The engine cannot be started when this item is "Yes". |
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
# Codes |
Number of trouble codes / 0 to 255 |
Number of stored DTCs displayed |
- |
|
Immobiliser |
State of immobiliser system determined by certification ECU (smart key ECU assembly) / Set or Unset |
Set: Immobiliser set (engine start prohibited) (engine switch off) Unset: Immobiliser unset (engine start permitted) (engine switch on (ACC) or on (IG)) |
HINT:
|
|
Steering Lock Sleep Cond |
steering lock ECU (steering lock actuator or UPR bracket assembly) sleep availability / Yes or No |
Yes: Sleep available No: Sleep not available |
- |
|
Steering Lock Start Cond |
steering lock ECU (steering lock actuator or UPR bracket assembly) wake up signal status / Yes or No |
Yes: Wake up signal sent No: Wake up signal not sent |
- |
|
Engine Start Condition |
State of engine start permission signal determined by steering lock ECU (steering lock actuator or UPR bracket assembly) sent to certification ECU (smart key ECU assembly) / OK or NG |
OK: Engine start permitted NG: Engine start prohibited |
|
|
Sensor Value |
Record of malfunction of lock or unlock sensor in steering lock ECU (steering lock actuator or UPR bracket assembly) (DTC B2781 is output) / OK or NG(Past) |
OK: No record of lock/ unlock sensor malfunction in steering lock ECU (steering lock actuator or UPR bracket assembly) NG(Past): Record of lock/ unlock sensor in steering lock ECU (steering lock actuator or UPR bracket assembly) turning ON at same time exists |
When this item displays "NG", the sensor inside the steering lock ECU (steering lock actuator or UPR bracket assembly) may be malfunctioning, or there may be a mechanical malfunction. |
|
Power Supply Short |
Record of malfunction of signal sent to steering lock motor (steering lock actuator assembly) from certification ECU (smart key ECU assembly) (short circuit) (DTC B2782 is output) / OK or NG(Past) |
OK: No record of malfunction (short circuit) NG(Past): Record of malfunction (short circuit) exists |
This item records malfunctions in the circuit between the certification ECU (smart key ECU assembly) and steering lock motor (steering lock actuator assembly). |
|
Motor Driver Short |
Record of malfunction of motor activation circuit in steering lock ECU (steering lock actuator or UPR bracket assembly) (short circuit) (DTC B2781 is output) / OK or NG(Past) |
OK: No record of malfunction (short circuit) NG(Past): Record of malfunction (short circuit) exists |
This item records malfunctions in the motor activation circuit inside the steering lock ECU (steering lock actuator or UPR bracket assembly) (short circuit). |
|
Lock/Unlock Receive |
Reception state of steering lock or unlock request signal from certification ECU (smart key ECU assembly) / Yes or No |
Yes: Record of receiving lock or unlock request signal exists No: No record of receiving lock or unlock request signal |
- |
|
Lock Bar Stuck Error |
Record of lock bar not properly unlocking after being commanded to unlock for certain amount of time / OK or NG(Past) |
OK: No record of stuck lock bar NG(Past): Record of stuck lock bar exist |
- |
|
Engine Start Request |
Reception state of engine start permission signal determined by steering lock ECU (steering lock actuator or UPR bracket assembly) sent to certification ECU (smart key ECU assembly) / OK or NG |
OK: Receiving signal NG: Not receiving signal |
|
|
L Code Check |
Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator or UPR bracket assembly) / OK or NG |
OK: Verification result normal NG: Verification result abnormal |
When a malfunction is present:
|
|
Unlock Request Receive |
Reception state of steering unlock request signal by certification ECU (smart key ECU assembly) / OK or NG HINT:
|
OK: Within 10 seconds of turning engine switch on (IG) or on (ACC) or starting engine NG: Except above |
|
|
Lock Request Receive |
Reception state of steering lock request signal by certification ECU (smart key ECU assembly) / OK or NG HINT:
|
OK: Within 10 seconds of opening any door with engine switch off and shift lever in P NG: Except above |
If this item does not change to "OK" even though the steering lock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning. |
|
L Code Check(Past) |
Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator or UPR bracket assembly) (Past) / OK or NG(Past) |
OK: Verification result normal NG(Past): Verification result abnormal (Past) |
- |
|
Steering Lock |
State of whether steering lock ECU (steering lock actuator or UPR bracket assembly) determined steering is locked / Set or Unset |
Set: Steering locked Unset: Steering unlocked |
If this item displays "Unset", the steering does not lock. |
|
Steering Unlock |
State of whether steering lock ECU (steering lock actuator or UPR bracket assembly) determined steering is unlocked / Set or Unset |
Set: Steering unlocked Unset: Steering locked |
If this item displays "Unset", the steering does not unlock (engine cannot be started). |
|
Engine Start Indicator |
Smart warning light / ON or OFF |
Customization status displayed |
- |
|
Open in IG2 |
History of IG2 input of the steering lock ECU (steering lock actuator or UPR bracket assembly) / OK or NG(Past) |
OK: History of open in IG2 exists NG(Past): No history of open in IG2 exists |
When OK is displayed, the steering lock ECU (steering lock actuator or UPR bracket assembly) has an IG2 input circuit malfunction. |
HINT:
Unlock operation conditions for the steering lock:
When the following condition is met, the unlock operation is performed:
The engine switch is on (ACC) or on (IG).
- When the engine switch is turned on (ACC) or on (IG) and the key and certification ECU (smart key ECU assembly) are verified, the steering is unlocked.
When any of the following conditions are met, key verification is performed.
- The brake pedal is depressed so that the engine can be started.
- 30 seconds have elapsed after opening and closing a door.
- The engine switch is pressed.
Key verification occurs when the code emitted from the key and the code stored in the certification ECU (smart key ECU assembly) are compared to check that they match.
Certification ECU (smart key ECU assembly) verification occurs when the L code is verified while the engine is being started or the engine switch is being pushed. The steering lock ECU (steering lock actuator or UPR bracket assembly) uses the L code to determine whether the certification ECU (smart key ECU assembly) is authorized.
Lock operation conditions for the steering:
When the following conditions are met and the certification ECU (smart key ECU assembly) has been verified, the lock operation is performed.
- The engine switch is off.
- The shift lever is in P.
- A door is opened or a door lock operation (door lock, wireless door lock or key-linked lock) is performed.
HINT:
The following example shows the behavior of various Data List items when the shift lever is in P, the brake pedal is not depressed, the vehicle is normal and the power source mode changes.
HINT:
Get into the vehicle while carrying the key. With the engine switch off, the shift lever in P and all the doors closed, perform the following procedures and check the power source mode.
- *1: Without depressing the brake pedal, press the engine switch and check that the power source mode changes to on (ACC).
- *2: Without depressing the brake pedal, press the engine switch and check that the power source mode changes to on (IG).
- *3: Press the engine switch and check that the power source mode changes to off.
- *4: Release the brake pedal, open the driver door and check that the steering locks.
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
FL Door Courtesy SW |
Front door courtesy light switch assembly LH / ON or OFF |
ON: Front door LH open OFF: Front door LH closed |
If this item does not change according to the actual state of the driver door, there is a malfunction in the door courtesy light switch or related part. |
2. ACTIVE TEST
HINT:
Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / Power Source Control / Active Test.
(f) According to the display on the Techstream, perform the Active Test.
Power Source Control|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
P Supply for Steering Lock |
Certification ECU (smart key ECU assembly) |
OFF/ON HINT: OFF: Power is not supplied ON: Power is supplied |
When performing this Active Test, make sure the following condition is met: The engine switch is on (IG). |
Terminals Of Ecu
TERMINALS OF ECU
1. TERMINAL INSPECTION
Text in Illustration
*a
Component without harness connected
(Steering Lock ECU (Steering Lock Actuator or UPR Bracket Assembly))
...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Steering Lock System
DTC Code
Detection Item
See page
B2781
Open / Short in Steering Lock ECU
...
Other materials:
ABS Warning Light Remains ON
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected to the combination
meter assembly via CAN communication.
If any of the following is detected, the ABS warning light remains on:
The skid control ECU (brake actuator assembly) connectors are disconnected
from the ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL CLUTCH DISC ASSEMBLY
(a) Insert SST into the clutch disc assembly, and then install SST and the clutch
disc assembly together to the flywheel sub-assembly.
Text in Illustration
Flywheel Sub-assembly Side
SST: 09301-00220
NOTICE ...
Engine Coolant Temperature Sensor
Components
COMPONENTS
ILLUSTRATION
Inspection
INSPECTION
PROCEDURE
1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR
(a) Partially immerse the engine coolant temperature sensor in water and warm
up the water.
(b) Measure the resistance according to the value(s) in the table bel ...
