Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Data List / Active Test

DATA LIST / ACTIVE TEST

1. 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) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / (desired system) / Data List.

(e) According to the display on the Techstream, read the Data List.

Power Source Control

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Shift P Signal

Shift position P/ON or OFF

ON: Shift lever in P

OFF: Shift lever not in P

  • Use this item to determine if the shift position switch is malfunctioning.
  • The engine cannot be started when this item is OFF.

Steering Unlock Switch

State of steering unlock sensor signal output from steering lock actuator assembly/ON or OFF

ON: Steering unlocked

OFF: Steering locked

  • When the shift lever is in P and the engine switch is off, if any door is opened then closed, the steering is locked.
  • When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks.
  • The engine cannot be started when the steering unlock signal is off.

Stop Light Switch1

State of brake pedal/ON or OFF

ON: Brake pedal depressed

OFF: Brake pedal released

  • Use this item to determine whether the stop light switch is malfunctioning.
  • The engine cannot be started when this item is OFF.
  • When this item is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.

Start Switch1

Engine switch 1 status/ON or OFF

ON: Engine switch pressed

OFF: Engine switch not pressed

  • If the engine switch is pressed for a short time, the display may not change.
  • Use this item to determine whether the engine switch input signal is malfunctioning.

Start Switch2

Engine switch 2 status/ON or OFF

ON: Engine switch pressed

OFF: Engine switch not pressed

  • Backup for engine switch 1. However, when the engine switch is pressed and held, the control functions only when both engine switch 1 and 2 are normal.
  • Behaves the same way as engine switch 1.

Neutral SW/ Clutch SW

Shift position (P and N)/ON or OFF

ON: Shift lever in P or N

OFF: Shift lever in any position other than P or N

  • Use this item to determine whether the park/neutral position switch is malfunctioning.
  • When the engine cannot be started due to a park/neutral position switch malfunction, OFF is displayed.

Latch Circuit

Status of IG related backup circuits/ON or OFF

ON: Engine switch on (IG)

OFF: Engine switch off

  • Displays in almost the same manner as the IG1 and IG2 relays.
  • When the engine switch is on (ACC), OFF is displayed.

Starter Request Signal

Engine start request signal status/ON or OFF

ON: With the shift lever in P and brake pedal depressed, the engine switch is pressed and held

OFF: After approx. 1 sec. has elapsed, the engine switch is released

  • When the engine cannot be started due to a start request signal malfunction, OFF is displayed.
  • When the engine switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the engine switch needs to be pressed and held for a certain amount of time.

ACC Relay Monitor

ACC relay activation/ON or OFF

ON: Engine switch on (ACC)

OFF: Engine switch off

  • When the engine switch is on (IG), ON is displayed.
  • While the engine is cranking, OFF is displayed.

Engine Condition

Engine state/Stop or Run

Stop: Engine stopped

Run: Engine running

-

Vehicle Speed Signal

Vehicle being driven or stopped/Stop or Run

Stop: Vehicle stopped

Run: Vehicle being driven at 5 km/h (3 mph) or more

-

Power Supply Condition

Power supply state/All OFF, ACC ON, IG ON or ST ON

All OFF: Engine switch off (ACC and IG)

ACC ON: Engine switch on (ACC)

IG ON: Engine switch on (IG)

ST ON: Sending engine start request signal

-

Powertrain Type

Vehicle identification/HV-AT, Cnv-MT, Cnv-AT, Cnv-MMT, S&S-MT, S&S-AT or S&S-MMT

Cnv-AT: Conventional A/T models (w/o hybrid system)

-

IG Circuit

IG relay coil circuit malfunction/OK or NG

OK: Circuit normal

NG: Circuit malfunctioning

  • Use this item to determine whether the IG relay is malfunctioning.
  • When the engine cannot be started due to an IG relay malfunction, NG is displayed.

IG Relay Monitor (Outside)

IG relay coil voltage monitor status/ON or OFF

ON: Engine switch on (IG)

OFF: Engine switch off

  • Use this item to determine whether the IG relay is malfunctioning.
  • When the engine switch is on (ACC), OFF is displayed.

IG Relay Monitor (Inside)

IG relay activation/ON or OFF

ON: Engine switch on (IG)

OFF: Engine switch off

  • Use this item to determine whether the IG relay is malfunctioning.
  • When the engine switch is on (ACC), OFF is displayed.

Starter SW Sig Mismatch

Engine switch signal 1 and 2 do not match/Yes or No

Yes: Switch malfunctioning (engine switch signal 1 and 2 do not match)

No: Switch normal

The engine can be started even if the result is Yes. However, emergency engine off while driving by pressing and holding the engine switch and, when the brakes are malfunctioning, emergency engine starting by pressing and holding the engine switch cannot be performed.

Park Signal Mismatch

P position signal malfunction/Yes or No

Yes: Signal malfunction (CAN communication and direct line signal do not match)

No: Signal normal

Even when Yes is displayed, it is still possible to turn the engine switch off (the power source mode will not be stuck in on (ACC) or on (IG)).

Str Lock/Unlock Wait T-Out

Steering lock or unlock malfunction/Yes or No

Yes: Lock or unlock malfunction (e.g. steering lock is stuck etc.)

No: Lock and unlock normal

When the engine cannot be started due to a steering lock or unlock malfunction, Yes is displayed.

Key Certif Wait T-Out

Key verification malfunction/Yes or No

Yes: Verification error (detected due to the electrical key transmitter sub-assembly ID code and the ID code stored in the certification ECU (smart key ECU assembly) not matching)

No: Verification normal

When the engine cannot be started due to a key verification error, Yes is displayed.

Number of Diagnosis Code

Number of DTCs/0 to 255

-

-

get into the vehicle while carrying an electrical key transmitter sub-assembly and To check if the Data List display changes, get into the vehicle while carrying an electrical key transmitter sub-assembly and perform the following operations with the engine switch off and the shift lever in P.

HINT:

*1: Press the engine switch with the brake pedal released and check that the engine switch is turned on (ACC).

*2: Press the engine switch with the brake pedal released and check that the engine switch is turned on (IG).

*3: Depress the brake pedal (stop light switch is on).

*4: Press the engine switch with the brake pedal depressed and check that the engine starts.

*5: Press the engine switch with the brake pedal depressed and check that the engine switch is turned off.

*6: Release the brake pedal.

*7: Open a door.

Smart Key

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Key Low Battery

Transmitter battery depleted/Yes or No

Yes: Transmitter battery depleted

No: Transmitter battery not depleted

The electrical key transmitter subassembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. The certification ECU (smart key ECU assembly) displays "Yes" for the "Key Low Battery" item of the Data List when this voltage information indicates 2.2 V or less. This Data List item should be checked when the electrical key transmitter subassembly is at room temperature (example: at -20°C (-4°F), "Yes" may be displayed even if the transmitter battery is new).

#Codes

Number of DTCs/0 to 255

-

-

Immobiliser

Engine immobiliser system determined by certification ECU (smart key ECU assembly)/ Set or Unset

Set: Engine immobiliser set (engine start prohibited) (engine switch off)

Unset: Engine immobiliser unset (engine start permitted) (engine switch on (ACC) or on (IG))

The engine cannot be started when Set is displayed.

HINT:

  • The security indicator light blinks when Set is displayed.
  • The security indicator light is linked with set/unset of the immobiliser and not linked with steering lock/unlock.

Steering Lock Sleep Cond

Steering lock ECU sleep availability/Yes or No

Yes: Sleep available

No: Sleep not available

-

Steering Lock Start Cond

Steering lock ECU wake up signal status/Yes or No

Yes: Wake up signal sent

No: Wake up signal not sent

-

Engine Start Condition

Status of engine start permission signal determined by steering lock steering lock ECU (steering lock actuator or upr bracket assembly) and sent to certification ECU (smart key ECU assembly)/OK or NG

OK: Engine start permitted

NG: Engine start prohibited

  • When OK is displayed, the certification ECU (smart key ECU assembly) receives an unlock confirmation signal from the steering lock ECU (steering lock actuator or upr bracket assembly) and makes fuel injection and engine starting possible.
  • The engine cannot be started when NG is displayed.

Sensor Value

History of malfunction of position sensor in steering lock ECU (steering lock actuator or upr bracket assembly)/ OK or NG(Past)

OK: History of malfunction for the lock or unlock sensor in the steering lock ECU (steering lock actuator or upr bracket assembly) does not exist.

NG(Past): History of both the lock and unlock sensors in the steering lock ECU (steering lock actuator or upr bracket assembly) being on exists (Under normal operation, neither sensor is on).

When NG (Past) is displayed, either the position sensor in the steering lock ECU (steering lock actuator or upr bracket assembly) or the assembly itself may be malfunctioning.

Power Supply Short

History of signal error (short) sent from certification ECU (smart key ECU assembly) to steering lock ECU (steering lock actuator or upr bracket assembly)/OK or NG(Past)

OK: History of motor power source short does not exist

NG(Past): History of motor power source short exists

This item displays history when a malfunction exists in the circuit between the certification ECU (smart key ECU assembly) and the steering lock ECU (steering lock actuator or upr bracket assembly).

Motor Driver Short

History of malfunction (short) in the steering lock ECU (steering lock actuator or upr bracket assembly) motor circuit (DTC B2781 is stored)./OK or NG(Past)

OK: History of short in the motor circuit does not exist

NG(Past): History of short in the motor circuit exists

History of a malfunction in the steering lock motor circuit in the steering lock ECU (steering lock actuator or upr bracket assembly).

Lock/Unlock Receive

History of receiving an unlock request signal/Yes or No

Yes: History of receiving an unlock request signal exists

No: History of receiving an unlock request signal does not exist

-

Lock Bar Stuck Error

History of the steering wheel not being able to unlock properly when the steering lock operates for a certain amount of time/OK or NG(Past)

OK: History of steering lock being stuck does not exist

NG(Past): History of steering lock being stuck exists

-

Engine Start Request

Status of engine start permission signal determined by steering lock ECU (steering lock actuator or upr bracket assembly) and sent to certification ECU (smart key ECU assembly)/ OK or NG

OK: Signal received

NG: Signal not received

  • When OK is displayed, the certification ECU (smart key ECU assembly) receives an unlock confirmation signal from the steering lock ECU (steering lock actuator or upr bracket assembly) and makes fuel injection and engine starting possible.
  • The engine cannot be started when NG is displayed.

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 NG is displayed:

  • L code has not been registered for the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator or upr bracket assembly).
  • Steering cannot be locked.
  • Steering cannot be unlocked (the engine cannot be started).

Unlock Request Receive

Unlock request signal received state/OK or NG

OK: Within 10 sec. of turning the engine switch on (IG) or on (ACC), or of an engine start operation being performed

NG: Engine switch on (IG) or on (ACC), or engine start operation not performed

  • The engine cannot be started when an unlock request signal cannot be received.
  • If OK is not displayed even though the steering unlock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.

Lock Request Receive

Lock request signal received state/ OK or NG

HINT:

  • The reception state is maintained for 10 seconds.
  • When 10 seconds or more elapse after receiving the signal, the item changes to "NG".

OK: Lock request signal received for 10 sec. of any of the doors being opened with shift lever in P and engine switch off.

NG: Except above

If OK is not displayed even though the steering lock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.

L Code Check(Past)

Verification result history between the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator or upr bracket assembly)/ OK or NG(Past)

OK: History of abnormal verification result does not exist

NG(Past): History of abnormal verification result exists

-

Steering Lock

Steering lock ECU (steering lock actuator or upr bracket assembly) lock confirmation status/Set or Unset

Set: Lock confirmed

Unset: Lock not confirmed

When Unset is displayed, the steering wheel is not locked.

Steering Unlock

Steering lock ECU (steering lock actuator or upr bracket assembly) unlock confirmation status/Set or Unset

Set: Unlock confirmed

Unset: Unlock not confirmed

When Unset is displayed, the steering wheel is not locked (the engine cannot be started).

Engine Start Indicator

Engine Start Indicator

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.

get into the vehicle while carrying an electrical key transmitter sub-assembly and To check if the Data List display changes, get into the vehicle while carrying an electrical key transmitter sub-assembly and perform the following operations with the engine switch off and the shift lever in P.

HINT:

*1: Press the engine switch with the brake pedal released and check that the engine switch is turned on (ACC).

*2: Press the engine switch with the brake pedal released and check that the engine switch is turned on (IG).

*3: Press the engine switch and check that the engine switch is turned off.

*4: Open any of the doors (steering locked).

Starting Control

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Starter SW

Starter operation request/ON or OFF

ON: Starter operation requested

OFF: Starter operation not requested

When malfunctioning, the engine will not crank.

Shift Position P or N

Park/neutral position switch status/ON or OFF

ON: Shift lever in P or N

OFF: Shift lever in any position other than P or N

When malfunctioning, the engine will not crank.

Starter Relay

Starter relay voltage monitor/ON or OFF

ON: ST relay on

OFF: ST relay off

OFF is displayed when the engine cannot crank.

Starting Control SW

Starter request signal monitor/ON or OFF

ON: Starting control switch on

OFF: Starting control switch off

When malfunctioning, the engine cannot crank.

Ignition

IG2 status/ON or OFF

ON: IG2 relay on

OFF: IG2 relay off

-

Engine Speed

Engine speed/0 to 16383 r/min

Fluctuates in accordance with engine speed

-

Number of DTCs

Number of DTCs/0 to 255

-

-

HINT:

HINT:

*: Check that the engine starts when the engine switch is pressed with the power source mode on (IG), shift lever in P and brake pedal depressed.

Combination Meter

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Vehicle Speed Meter

Vehicle speed/Min.: 0, Max.: 255

Almost same as actual vehicle speed (Speedometer tester)

-

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) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / (desired system) / Active Test.

(e) 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

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).

Smart Key

Tester Display

Test Part

Control Range

Diagnostic Note

Power/Engine SW Light

Engine switch light

OFF/ON

When performing this Active Test, make sure the following condition is met:

The engine switch illumination is off (15 seconds or more have elapsed since it turned from on to off) and the engine switch is on (ACC) or on (IG), or the engine is running.

Starting Control

Tester Display

Test Part

Control Range

Diagnostic Note

Activate the Starter Relay

ST relay

OFF/ON

The electrical key transmitter subassembly is in the cabin and the engine is stopped.

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (a) Disconnect the C27 and C29 certification ECU (smart key ECU assembly) connectors. (b) Measure the voltage and resistance a ...

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Smart Key System (for Start Function) DTC Code Detection Item See page B2271 Ignition Hold Monitor Malfunct ...

Other materials:

Check Bus 2 Lines for Short Circuit
DESCRIPTION There may be a short circuit between the CAN main bus lines and/or CAN branch lines when the resistance between terminals 18 (CA4H) and 17 (CA4L) of the central gateway ECU (network gateway ECU) is below 54 Ω. Detection Item Trouble Area Resi ...

Noise Occurs or Sound Skips when Portable Player Plays
CAUTION / NOTICE / HINT HINT: Perform this check with the portable player volume set at an appropriate level. Make sure that there are no obstructions between the portable player and radio and display receiver assembly that may block signals, and that the portable player an ...

Power Source Mode does not Change to ON (IG)
DESCRIPTION If the engine switch is pressed with the electrical key transmitter sub-assembly in the cabin, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. HINT: When the cable is disconnected and reconnected to the negative (-) battery termi ...

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