Toyota Tundra Service Manual: Data List / Active Test

Toyota Tundra Service Manual / Vehicle Interior / Air Conditioning / Air Conditioning System(for Manual Air Conditioning 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 ignition switch OFF.

(d) Turn the ignition switch ON.

(e) Turn the Techstream on.

(f) Enter the following menus: ALL ECUs / (desired menu) / Data List.

(g) According to the display on tester, read the "Data List".

Air Conditioner

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Ambient Temp Sensor	Ambient temperature sensor / Min.: -23.3°C (-9.94°F) Max.: 65.95°C (150.71°F)	Actual ambient temperature is displayed	Open in circuit: -23.3°C (-9.94°F) Short in circuit: 65.95°C (150.71°F)
Adjusted Ambient Temp	Adjusted ambient temperature / Min.: -30.8°C (-23.44°F) Max.: 50.8°C (123.44°F)	Adjusted ambient temperature is displayed	-
Evaporator Fin Thermistor	No. 1 cooler thermistor / Min.: -29.7°C (-21.46°F) Max.: 59.55°C (139.19°F)	Actual No. 1 cooler thermistor is displayed	Open in circuit: -29.7°C (-21.46°F) Short in circuit: 59.55°C (139.19°F)
Engine Coolant Temp	Engine coolant temperature / Min.: 1.3°C (34.34°F) Max.: 90.55°C (194.99°F)	Actual engine coolant temperature is displayed while engine is warmed up	-
Air Mix Servo Targ Pulse (D)	No. 1 damper servo sub-assembly (air mix servo motor) target pulse / Min.: 0, Max.: 255	MAX. COLD: 5 (pulse) MAX. HOT: 104 (pulse)	-
Air Outlet Servo Pulse (D)	No. 1 damper servo sub-assembly (air outlet servo motor) target pulse / Min.: 0, Max.: 255	FACE: 9 (pulse) MID: 25 (pulse) B/L: 32 (pulse) MID: 39 (pulse) FOOT: 64 (pulse) MID: 77 (pulse) FOOT/DEF: 83 (pulse) MID: 91 (pulse) DEF: 97 (pulse)	-
Air Inlet Damper Targ Pulse	Air inlet damper target pulse / Min.: 0, Max.: 255	REC: 7 FRS: 28	-
Ambient Temperature Shift	Ambient temperature shift / 3C incr, 2C incr, 1C incr, Normal, 1C decr, 2C decr or 3C decr	Customized value will be displayed	-
Number of Trouble Codes	Number of trouble codes / Min.: 0, Max.: 255	Number of DTCs will be displayed	-

Engine and ECT

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

A/C Signal

A/C switch signal /

ON or OFF

ON: A/C switch ON

OFF: A/C switch OFF

2. PERFORM ACTIVE TEST

HINT:

Using the Techstream to perform the Active Tests allows relays, VSVs and 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.

(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.

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

Air Conditioner

Tester Display	Test Part	Control Range	Diagnostic Note
Magnetic Clutch Relay	Magnetic clutch relay	ON or OFF	-
Defogger Relay (Rear)	Defogger relay	ON or OFF	-
Mirror Heater Relay	Mirror heater relay	ON or OFF	-
Deicer Relay (Front)	Deicer relay	ON or OFF	-
Air Mix Servo Targ Pulse (D)	No. 1 damper servo sub-assembly (air mix servo motor) pulse	Min.: 5, Max.: 104	-
Air Outlet Servo Pulse (D)	No. 1 damper servo sub-assembly (air outlet servo motor) pulse	Min.: 9, Max.: 97	-
Air Inlet Damper Targ Pulse	Air inlet damper target pulse	Min.: 7, Max.: 28	-

Blower Motor Circuit

Diagnostic Trouble Code Chart

See More:

Toyota Tundra Service Manual > Refrigerant(for Hfo-1234yf(r1234yf)): On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET HINT: The following examples show the readings of a manifold gauge set and the corresponding air conditioning system problems. (a) Read the manifold gauge pressure when the following conditions are met: Doors are ...

Toyota Tundra Service Manual: Data List / Active Test

Blower Motor Circuit

Diagnostic Trouble Code Chart

See More:

Toyota Tundra Owners Manual

Toyota Tundra Service Manual