| Last Modified: 11-29-2007 | 1.6 U | |
| Service Category: Vehicle Interior | Section: Heating/Air Conditioning | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000002VXA004X |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: DATA LIST / ACTIVE TEST (2008 Sequoia) | ||
DATA LIST / ACTIVE TEST
1. READ DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches, sensor, 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 to ON.
(e) Turn the Techstream on.
(f) Enter the following menus: Body Electrical / (desired menu) / Data List.
(g) According to the display on the Techstream, read the Data List.
Air Conditioner
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Room Temperature Sensor |
Room temperature sensor / Min.: -6.5°C (20.3°F) Max.: 57.25°C (135.05°F) |
Actual room temperature for front seat is displayed |
Open in circuit: -6.5°C (20.3°F) Short in circuit: 57.25°C (135.05°F) |
|
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 Temperature |
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 |
Evaporator fin thermistor / Min.: -29.7°C (-21.46°F) Max.: 59.55°C (139.19°F) |
Actual evaporator temperature is displayed |
Open in circuit: -29.7°C (-21.46°F) Short in circuit: 59.55°C (139.19°F) |
|
Solar Sensor (D Side) |
Driver side solar sensor / Min.: 0, Max.: 255 |
Driver side solar sensor voltage increases as brightness increases |
Open in circuit: 0 Short in circuit: 255 |
|
Solar Sensor (P Side) |
Passenger side solar sensor / Min.: 0, Max.: 255 |
Passenger side solar sensor voltage increases as brightness increases |
Open in circuit: 0 Short in circuit: 255 |
|
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 |
- |
|
Set Temperature (D Side) |
Driver side set temperature / Min.: 0, Max.: 255 |
Driver side actual set temperature is displayed |
- |
|
Set Temperature (P Side) |
Passenger side set temperature / Min.: 0, Max.: 255 |
Passenger side actual set temperature is displayed |
- |
|
Blower Motor Speed Level |
Blower motor speed level / Min.: 0 level, Max.: 31 level |
Increases in range between 0 and 31 as blower motor speed increases |
- |
|
Regulator Pressure Sensor |
Regulator pressure / Min: -0.45668 MPaG Max: 3.29437 MPaG |
Actual regulator pressure for front seat is displayed |
- |
|
Room Temp Sensor (Rear) |
Room temperature sensor / Min.: -6.5°C (20.3°F) Max.: 57.25°C (135.05°F) |
Actual room temperature for front seat is displayed |
Open in circuit: -6.5°C (20.3°F) Short in circuit: 57.25°C (135.05°F) |
|
Ambient Temp Sens (Rear) |
Rear evaporator fin thermistor / Min.: -29.7°C (-21.46°F) Max.: 59.55°C (139.19°F) |
Actual evaporator temperature is displayed |
Open in circuit: -29.7°C (-21.46°F) Short in circuit: 59.55°C (139.19°F) |
|
Set Temperature (Rear) |
Rear side set temperature / Min.: 0, Max.: 255 |
Rear side actual set temperature is displayed |
- |
|
Blower Motor Level (Rear) |
Blower motor speed level / Min.: 0 level, Max.: 31 level |
Increases in range between 0 and 31 as blower motor speed increases |
- |
|
Air Outlet Servo Pulse (R) |
Rear side air outlet servo motor target pulse / Min.: 0, Max.: 255 |
Customized value displayed |
- |
|
Air Mix Servo Targ Pulse (R) |
Rear side air mix servo motor target pulse / Min.: 0, Max.: 255 |
Customized value displayed |
- |
|
Air Mix Servo Targ Pulse (D) |
Driver side air mix servo motor target pulse / Min.: 0, Max.: 255 |
MAX. COLD: 5 (pulse) MAX. HOT: 104 (pulse) |
- |
|
Air Mix Servo Targ Pulse (P) |
Passenger side air mix servo motor target pulse / Min.: 0, Max.: 255 |
MAX. COLD: 105 (pulse) MAX. HOT: 6 (pulse) |
- |
|
Air Outlet Servo Pulse (D) |
Driver side air outlet servo motor target pulse / Min.: 0, Max.: 255 |
FACE: 9 (pulse) B/L: 32 (pulse) FOOT: 56 (pulse) FOOT/DEF: 83 (pulse) DEF: 97 (pulse) |
- |
|
Air Inlet Damper Targ Pulse |
Air inlet damper target pulse / Min.: 0, Max.: 255 |
REC: 7 FRS: 28 |
- |
|
Shift Set Temperature |
Shift set temperature / +2 C, +1 C, Normal, -1 C, -2 C |
Customized value will be displayed |
- |
|
Air Inlet Mode |
Air inlet mode / Auto, Manual |
Customized value will be displayed |
- |
|
Compressor Mode |
Compressor mode / Auto, Manual |
Customized value will be displayed |
- |
|
Compressor/DEF Mode |
Compressor/DEF mode / Link, Normal |
Customized value will be displayed |
- |
|
Foot/DEF Auto Mode |
FOOT/DEF auto mode / ON, OFF |
Customized value will be displayed |
- |
|
Foot/DEF Auto Blow Up |
FOOT/DEF auto blower up function / ON, OFF |
Customized value will be displayed |
- |
|
Ambient Temperature Shift |
Ambient temperature shift / +3 C, +2 C, +1 C, Normal, -1 C, -2 C, -3 C |
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 |
Air conditioning switch signal / ON or OFF |
ON: Air conditioning ON OFF: Air conditioning 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: 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 |
|---|---|---|---|
|
Blower Motor |
Blower motor |
Min.: 0, Max.: 31 |
- |
|
Magnetic Clutch Relay |
Magnetic clutch relay |
ON or OFF |
- |
|
Air Mix Servo Targ Pulse (D) |
Driver side air mix servo motor pulse |
Min.: 0, Max.: 255 |
- |
|
Air Mix Servo Targ Pulse (P) |
Passenger side air mix servo motor pulse |
Min.: 0, Max.: 255 |
- |
|
Air Outlet Servo Pulse (D) |
Driver side air outlet servo motor pulse |
Min.: 0, Max.: 255 |
- |
|
Air Inlet Damper Targ Pulse |
Air inlet damper target pulse |
Min.: 0, Max.: 255 |
- |
|
Cool Air Bypass Pulse |
Driver side cool air bypass pulse |
Min.: 0, Max.: 255 |
- |
|
Rear Blower Motor |
Rear Blower motor |
Min.: 0, Max.: 31 |
- |
|
Rear Air Mix Servo Targ Pulse |
Rear air mix servo motor pulse |
Min.: 0, Max.: 255 |
- |
|
A/O Servo Pulse (Rr D) |
Driver side air outlet servo motor pulse |
Min.: 0, Max.: 255 |
- |
|
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