Toyota Tacoma (2015-2018) Service Manual: Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
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 ignition switch ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.
(e) Check the value(s) by referring to the table below.
Air Conditioner|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Ambient Temp Sensor |
Ambient temperature sensor / Min.: -23.30°C (-9.94°F) Max.: 65.95°C (150.71°F) |
Actual ambient temperature displayed |
- |
|
Adjusted Ambient Temp |
Adjusted ambient temperature / Min.: -30.80°C (-23.44°F) Max.: 50.80°C (123.44°F) |
- |
- |
|
Evaporator Fin Thermistor |
Cooler thermistor sensor (evaporator temperature sensor) / Min.: -29.70°C (-21.46°F) Max.: 59.55°C (139.19°F) |
Actual evaporator temperature displayed |
- |
|
Evaporator Target Temp |
Evaporator target temperature / Min.: -327.68°C (-557.82°F) Max.: 327.67°C (621.81°F) |
Evaporator target temperature displayed |
- |
|
Engine Coolant Temp |
Engine coolant temperature sensor / Min.: 1.30°C (34.34°F) Max.: 90.55°C (194.99°F) |
Actual engine coolant temperature displayed |
- |
|
Regulator Pressure Sensor |
Air conditioner pressure sensor / Min.: -66.22 psi (gauge) Max.: 477.68 psi (gauge) |
Actual pressure is displayed |
- |
|
Electric Heater Count*1 |
Maximum heater operation level / Min.: 0 Max.: 3 |
Maximum possible operation level of quick heater assembly (PTC heater) displayed |
- |
|
Electric Heater Active Level*1 |
Actual heater operation level / Min.: 0 Max.: 3 |
Actual operation level of quick heater assembly (PTC heater) displayed |
- |
|
Refrigerant Gas Type |
Refrigerant gas type / R134a or 1234yf |
Refrigerant gas type displayed |
- |
|
Number of Trouble Codes |
Number of trouble codes / Min.: 0 Max.: 255 |
Number of DTCs displayed |
- |
- *1: w/ PTC Heater
2. ACTIVE TEST
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 ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.
(e) Check the operation by referring to the table below.
Air Conditioner|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Magnetic Clutch Relay |
Air conditioning system operation |
OFF, ON |
- |
|
Mirror Heater Relay |
Mirror heater |
OFF, ON |
- |
|
Electrical Fan |
Electrical Fan |
OFF, ON |
- |
|
Heater Active Level*1 |
Quick heater assembly |
Min.: 0, Max.: 3 |
- |
- *1: w/ PTC Heater
Terminals Of Ecu
TERMINALS OF ECU
1. AIR CONDITIONING AMPLIFIER ASSEMBLY
HINT:
Check from the rear of the connector while it is connected to the air conditioning
amplifier assembly.
Terminal No.
...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Air Conditioning System
DTC Code
Detection Item
Memory
See page
B1412
Ambient Temperature Sensor ...
Other materials:
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
VSC System
DTC Code
Detection Item
See page
C1201
Engine Control System Malfunction
C1203
ECM Communication Circuit Malfunction
C120B
...
Radar Cruise Control Presence Determination Malfunction (Engine / HV) (C1A52)
DESCRIPTION
DTC C1A52 is stored when the ECM cannot recognize the millimeter wave radar sensor
assembly.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C1A52
Radar Cruise Control Presence Determination Malfuncti ...
Towing Tail Relay
Inspection
INSPECTION
PROCEDURE
1. INSPECT TOWING TAIL RELAY
(a) Check the resistance.
(1) Using an ohmmeter, measure the resistance between the terminals.
Standard:
Tester Connection
Specified Condition
3-5
10 kΩ or higher
...
