Toyota Tacoma manuals

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

DATA LIST / ACTIVE TEST

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.

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.

1. DATA LIST OF 4 WHEEL DRIVE CONTROL ECU

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Four Wheel Drive / Data List.

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

Four Wheel Drive

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

FR Wheel Speed

Front wheel speed sensor RH reading/

Min.: 0.00 km/h (0.00 mph)

Max.: 327.67 km/h (203.61 mph)

Vehicle stopped: 0.00 km/h (0.00 mph)

No large fluctuations when driving at a constant speed.

FL Wheel Speed

Front wheel speed sensor LH reading/

Min.: 0.00 km/h (0.00 mph)

Max.: 327.67 km/h (203.61 mph)

Vehicle stopped: 0.00 km/h (0.00 mph)

No large fluctuations when driving at a constant speed.

RR Wheel Speed

Rear wheel speed sensor RH reading/

Min.: 0.00 km/h (0.00 mph)

Max.: 327.67 km/h (203.61 mph)

Vehicle stopped: 0.00 km/h (0.00 mph)

No large fluctuations when driving at a constant speed.

RL Wheel Speed

Rear wheel speed sensor LH reading/

Min.: 0.00 km/h (0.00 mph)

Max.: 327.67 km/h (203.61 mph)

Vehicle stopped: 0.00 km/h (0.00 mph)

No large fluctuations when driving at a constant speed.

Vehicle Speed

Maximum wheel speed sensor reading/

Min.: 0.00 km/h (0.00 mph)

Max.: 327.67 km/h (203.61 mph)

Vehicle stopped: 0.00 km/h (0.00 mph)

No large fluctuations when driving at a constant speed.

Rear Differential Lock Control SW (R)

Differential lock switch status (differential lock switch input signal of R terminal on ECU side)/

ON or OFF

ON: Switch pressed and held

OFF: Switch not pressed

-

Rear Differential Lock Detection SW (SLS)

Differential lock indicator switch status (differential lock indicator switch input signal of SLS terminal on ECU side)/

ON or OFF

ON: Rear differential locked condition

OFF: Rear differential free condition

-

IG SW

Ignition switch status/

ON or OFF

ON: Ignition switch ON

-

Rear Differential Lock Solenoid Target Current

Differential lock coil drive circuit target current value/

Min.: 0.0 A

Max.: 25.5 A

Rear differential locked: 1.0 to 8.0 A

Rear differential free: 0.1 A or less

-

Rear Differential Lock Solenoid Actual Current

Differential lock coil drive circuit actual current value/

Min.: 0.0 A

Max.: 25.5 A

Rear differential locked: 1.0 to 8.0 A

Rear differential free: 0.1 A or less

-

Motor Energization Status Signal

Motor power signal status/

ON or OFF

ON: Power supplied to motor

OFF: Power not supplied to motor

-

C/C Cancel Request

Cruise control cancellation signal status/

ON or OFF

ON: Cruise control cancellation requested

OFF: Cruise control cancellation not requested

-

Rear Differential Lock Status Signal

Rear differential LOCK status signal/

ON or OFF

ON: Rear differential locked condition

OFF: Rear differential free condition

-

Buzzer Request

Buzzer sounding request/

NO Sound, Sound(3 times) or Sound

  • NO Sound: Does not sound
  • Sound(3 times): Sounds 3 times
  • Sound: Sounds intermittently
  • Sounds 3 times: Sounds 3 times at 0.5 second intervals (0.5 seconds on and 0.5 seconds off)
  • Sounds intermittently: 0.5 second intervals (0.5 seconds on and 0.5 seconds off)

Rear Differential Lock Indicator Request

Rear differential lock indicator light request/

Blink4*1, Blink3, Blink2, Blink1, ON or OFF

  • Blink3: Indicator light rapidly blinks
  • Blink2: Indicator light blinks 3 times
  • Blink1: Indicator light blinks
  • ON: Indicator light illuminates
  • OFF: Indicator light turns off
  • Blinking: 0.5 second intervals (0.5 seconds on and 0.5 seconds off)
  • Rapidly blinking: 0.25 second intervals (0.25 seconds on and 0.25 seconds off)

Rear Differential Lock Solenoid Energization Request

Differential lock coil power command/

ON or OFF

ON: Power supplied to differential lock coil

OFF: Power not supplied to differential lock coil

-

IG Voltage

IG monitor voltage/

Min.: 0.0 V

Max.: 25.5 V

11 to 14 V: Ignition switch ON

-

Rear Differential Lock Solenoid Voltage

Differential lock coil drive circuit monitor voltage/

Min.: 0.0 V

Max.: 25.5 V

Rear differential locked: Higher than 3.5 V

Rear differential free: 3.5 V or less

-

Rear Differential Lock Solenoid Duty

Differential lock coil drive circuit duty/

Min.: 0%

Max.: 255%

Rear differential locked: 0 to 100%

Rear differential free: 0%

-

Mode Status

Mode transition condition/

Initial Control, Particular Control at Start-Up, Shift Settling Control at Start-Up, H2, H2->H4L(T/F Activating), H2->H4L(ADD Activating), H4L->H2(T/F Activating), H4L->H2(ADD Activating), H4L, H4L->L4L, L4L->H4L, L4L Rr Diff. Free, H4F->L4F, L4F->H4F, H4F, H4F->H4L, H4L->H4F, L4F, L4L Rr Diff. Free->Lock, L4L Rr Diff. Lock->Free, L4L Rr Diff. Lock, K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, S01, S02, S03, S04, S05, S06, S07, S08, S09, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22, S23, S24, B1, B2, B3, B4, B5, B6, 2WD Rr Diff. Free, 2WD Rr Diff. Free->Lock, 2WD Rr Diff. Lock->Free or 2WD Rr Diff. Lock

Displays transfer shift actuator, A.D.D. actuator*2 and differential lock coil transition condition

HINT:

  • K1 to K10: Control while switching prohibited
  • S01 to S24: Control while switching limited
  • B1 to B6: Control while switching again

Rear Differential Lock Solenoid

Differential lock coil ECU internal power status/

ON or OFF

ON: Power supplied

OFF: Power not supplied

-

CAN Signal Invalid Status by IG Voltage Low

Whether CAN communication data is invalid due to IG voltage drop/

Valid or Inval

Valid: IG voltage 9.5 V or higher

Inval: IG voltage below 9.5 V

SW Input Invalid Status by IG Voltage Low

Whether actuator switch input is invalid due to IG voltage drop/

Valid or Inval

Valid: IG voltage 7.1 V or higher

Inval: IG voltage below 7.1 V

Transfer Shift Invalid Status by IG Voltage Low

Whether transfer shift actuator switching operation is invalid due to IG voltage drop/

Valid or Inval

Valid or Inval

Inval: IG voltage below 9.5 V

Number of DTC

Number of DTCs stored/

Min.: 0

Max.: 255

0

-

  • *1: Item not supported, therefore not displayed
  • *2: w/ A.D.D. Actuator
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