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

Toyota Tacoma (2015-2018) Service Manual / 2gr-fks Charging / Charging System / 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.

(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.

(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:

TC and CG Terminal Circuit
DESCRIPTION The DLC3 circuit enables reading of Diagnostic Trouble Codes (DTCs) with no Techstream by connecting terminals TC and CG of the DLC3 connector. Stored DTCs are displayed in blinking patterns of the CRUISE MAIN indicator light located on the combination meter. WIRING DIAGRAM HIN ...

ECU Power Source Circuit
DESCRIPTION The IG circuit is the power source for the tire pressure warning ECU and receiver. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the Techstream and write th ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by check ...