Toyota Tacoma manuals

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) Warm up the engine.

(b) Turn the A/C switch off.

(c) Turn the ignition switch off.

(d) Connect the Techstream to the DLC3.

(e) Turn the ignition switch to ON.

(f) Turn the Techstream on.

(g) Enter the following menus: Powertrain / Engine / Data List.

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

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Battery Voltage

Battery voltage /

Min.: 0.0 V, Max.: 65.5 V

11 to 14 V (Idling)

If the result is not as specified, abnormal battery voltage is suspected.

BATT Voltage

BATT voltage /

Min.: 0.0 V, Max.: 79.998 V

11 to 14 V (Idling)

-

Alternator Output Duty Ratio

Generator output duty /

Min.: 0.0%, Max.: 399.9%

Changes according to alternator output

If the result is not as specified, a malfunction of the charging system is suspected.

Alternator Voltage - Non Active Test

Requested voltage when regulator forced drive is not executed

Min.: 0.0 V, Max.: 79.998 V

13.5 to 14.4 V: After engine start (varies with battery temperature or driving conditions)

Active Test support data

Voltage of Alternator

Voltage of Alternator /

Min.: 0.0 V, Max.: 79.9 V

-

-

HINT:

Normal Condition: If no idling conditions are specified, the shift lever should be in N (Neutral) or P, and the A/C switch and all accessory switches should be off.

2. PERFORM 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 ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Active Test.

(e) According to the display on the Techstream, perform the Active Test.

Tester Display

Test Part

Control Range

Diagnostic Note

Control the Voltage of Alternator

Requested output voltage of generator regulator during forced activation

Between 12.5 and 14.8 V

Test is possible after engine start

Freeze Frame Data
FREEZE FRAME DATA 1. DESCRIPTION The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful ...

Fail-safe Chart
FAIL-SAFE CHART If any of the following DTCs are stored, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily. DTC Fail-safe Operation Fail- ...

Other materials:

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Starting System
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Disassembly
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