Toyota Tundra 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 ignition switch OFF.

(c) Connect the Techstream to the DLC3.

(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.

(c) Turn the Techstream 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

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