| Last Modified: 11-27-2007 | 1.6 U | |
| Service Category: Vehicle Interior | Section: Heating/Air Conditioning | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002LIV006X |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: DATA LIST / ACTIVE TEST (2008 LX570) | ||
DATA LIST / ACTIVE TEST
1. 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) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.
(e) Enter the following menus: Powertrain / Engine and ECT / Data List.
(f) 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 |
Front room temperature sensor / Min.: -6.5°C (20.3°F) Max.: 57.25°C (135.05°F) |
Actual room temperature for front seat displayed |
Open in the circuit: -19°C (-2.2°F). Short in the circuit: 70°C (158°F). |
|
Ambient Temp Sensor |
Ambient temperature sensor / Min.: -23.3°C (-9.94°F) Max.: 65.95°C (150.71°F) |
Actual ambient temperature displayed |
Open in the circuit: -53°C (-63.4°F). Short in the circuit: 126°C (258.8°F). |
|
Adjusted Ambient Temp |
Adjusted ambient temperature / Min.: -30.8°C (-23.44°F) Max.: 50.8°C (123.44°F) |
Adjusted ambient temperature displayed |
- |
|
Evaporator Fin Thermistor |
No. 1 cooler thermistor / Min.: -29.7°C (-21.46°F) Max.: 59.55°C (139.19°F) |
Actual evaporator temperature displayed |
Open in the circuit: -73°C (-99.4°F). Short in the circuit: 114°C (237.2°F). |
|
Evaporator Target Temp |
Target evaporator temperature / Min.: 1.5°C (34.7°F) Max.: 4.0°C (39.2°F) |
Target evaporator temperature displayed |
- |
|
Solar Sensor (D Side) |
Driver side solar sensor / Min.: 0, Max.: 255 |
Driver side solar sensor voltage increases as brightness increases |
Open in the circuit: 0. Short in the 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 the circuit: 0. Short in the 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 displayed while engine warmed up |
- |
|
Set Temperature (D Side) |
Driver side set temperature / Lo: 17.5°C (63.5°F) Hi: 32.5°C (90.5°F) |
Driver side actual set temperature displayed |
- |
|
Set Temperature (P Side) |
Passenger side set temperature / Lo: 17.5°C (63.5°F) Hi: 32.5°C (90.5°F) |
Passenger side actual set temperature displayed |
- |
|
Hand Free Telephone |
Handsfree telephone / OFF or ON |
ON: Handsfree telephone used OFF: Handsfree telephone not used |
- |
|
Blower Motor Speed Level |
Blower motor speed level / Min.: 0 Max.: 31 |
Increases in range between 0 and 31 as blower motor speed increases |
- |
|
Emission Gas Nox Sensor |
Smog ventilation sensor/ Min.: 0, Max.: 255 |
Increases as gas amount increases |
- |
|
Emission Gas Sensor |
Smog ventilation sensor / Min.: 0, Max.: 255 |
Decreases as gas amount increases |
- |
|
Regulator Pressure Sensor |
Refrigerant pressure sensor / Min.: -0.4566 MPaG Max.: 3.2943 MPaG |
Actual refrigerant pressure displayed |
- |
|
Room Temp Sensor (Rear) |
Rear room temperature sensor LH / Min.: -6.5°C (20.3°F) Max.: 57.25°C (135.05°F) |
Actual rear room temperature for LH seat displayed |
Open in the circuit: -19°C (-2.2°F). Short in the circuit: 70°C (158°F). |
|
Ambient Temp Sens (Rear) |
Rear evaporator temperature sensor / Min.: -29.7°C (-21.46°F) Max.: 59.55°C (139.19°F) |
Actual rear evaporator temperature displayed |
Open in the circuit: -73°C (-99.4°F). Short in the circuit: 114°C (237.2°F). |
|
Blower Motor Level (Rear) |
Rear blower motor speed level / Min.: 0, Max.: 31 |
Increases in range between 0 to 31 as rear blower motor speed increases |
- |
|
Air Outlet Servo Pulse (R) |
Rear air outlet damper servo motor target pulse/ Min.: 7, Max.: 83 |
FOOT: 7 (pulse) B/L: 42 (pulse) FACE: 83 (pulse) |
- |
|
Air Mix Servo Targ Pulse(D) |
Air mix damper servo motor (for driver side) target pulse / Min.: 8, Max.: 90 |
Max cool: 90 (pulse) Max hot: 8 (pulse) |
- |
|
Air Mix Servo Targ Pulse(P) |
Air mix damper servo motor (for front passenger side) target pulse / Min.: 8, Max.: 90 |
Max cool: 8 (pulse) Max hot: 90 (pulse) |
- |
|
Air Inlet Damper Targ Pulse |
REC/FRS damper servo motor target pulse / Min.: 9, Max.: 37 |
RECIRCULATION: 37 (pulse) FRESH: 9 (pulse) |
- |
|
Cool Air Bypass Pulse |
Cool air bypass damper servo motor target pulse / Min.: 6, Max.: 57 |
Shut: 6 (pulse) Open: 57 (pulse) |
- |
|
Electric Heater Count |
Number of electric heaters operating / Min.: 0, Max.: 3 |
- |
- |
|
Shift Set Temperature |
Set temperature / +2 C, +1 C, NORMAL, -1 C or -2 C |
Customized value displayed |
- |
|
Air Inlet Mode |
Air inlet mode / AUTO or MANUAL |
Customized value displayed |
- |
|
Compressor Mode |
Compressor mode / AUTO or MANUAL |
Customized value displayed |
- |
|
Compressor/DEF Mode |
Compressor/DEF mode / LINK or NORMAL |
Customized value displayed |
- |
|
Evaporator Control |
Evaporator control / AUTO or MANUAL |
Customized value displayed |
- |
|
Emission Gas Sensor Shift |
Emission gas sensor shift / MU MORE, MORE, LI MORE, NORMAL, LI LESS, LESS or MU LESS |
Customized value displayed |
- |
|
Button Press Buzzer |
Button press buzzer / ON or OFF |
Customized value displayed |
- |
|
Ambient Temperature Shift |
Ambient temperature shift / +3 C, +2 C, +1 C, NORMAL, -1 C, -2 C or -3 C |
Customized value displayed |
- |
|
A/O Damper FACE Pos(D) |
Air outlet damper servo motor (for driver side mode) target pulse / Min.: 6, Max.: 117 |
FACE: 109 (pulse) FACE2: 109 (pulse) FACE3: 117 (pulse) B/L1: 93 (pulse) B/L2: 81 (pulse) FOOT-D: 52 (pulse) FOOT-R: 41 (pulse) FOOT: 41 (pulse) F/D: 18 (pulse) DEF: 6 (pulse) |
- |
|
A/O Damper FACE Pos(P) |
Air outlet damper servo motor (for front passenger side mode) target pulse / Min.: 6, Max.: 117 |
FACE1: 117 (pulse) FACE2: 109 (pulse) B/L1: 93 (pulse) B/L2: 81 (pulse) FOOT-F: 41 (pulse) FOOT-R: 41 (pulse) FOOT-D: 52 (pulse) F/D: 18 (pulse) DEF: 6 (pulse) |
- |
|
Air Mix Servo Targ Pls(F&R D) |
Front air mix damper servo motor (for driver side rear air flow) target pulse / Min.: 13, Max.: 41 |
Max cool: 13 (pulse) Max hot: 41 (pulse) |
- |
|
Air Mix Servo Targ Pls(F&R P) |
Front air mix damper servo motor (for front passenger side rear air flow) target pulse / Min.: 5, Max.: 33 |
Max cool: 33 (pulse) Max hot: 5 (pulse) |
- |
|
Air Outlet Servo Pls (F&R D) |
Air outlet damper servo motor (for rear seat mode) target pulse / Min.: 9, Max.: 79 |
FACE1: 9 (pulse) FACE2: 9 (pulse) B/L1: 28 (pulse) B/L2: 34 (pulse) FOOT-O: 41 (pulse) FOOT-D: 41 (pulse) FOOT-R: 41 (pulse) FOOT-F: 58 (pulse) F/D: 67 (pulse) DEF: 79 (pulse) |
- |
|
Room Temperature Sensor (RP) |
Rear room temperature sensor RH / Min.: -6.5°C (20.3°F) Max.: 57.25°C (135.05°F) |
Actual rear room temperature for RH seat displayed |
Open in the circuit: -19°C (-2.2°F). Short in the circuit: 70°C (158°F). |
|
Set Temperature (Rear D side) |
Rear driver side set temperature / Lo: 17.5°C (63.5°F) Hi: 32.5°C (90.5°F) |
Rear driver side actual set temperature displayed |
- |
|
Set Temperature (Rear P side) |
Rear passenger side set temperature / Lo: 17.5°C (63.5°F) Hi: 32.5°C (90.5°F) |
Rear passenger side actual set temperature displayed |
- |
|
Pls Servo Test Sts |
Pulse servo motor test status / 00, 01, 02, 03 or 04 |
Not in effect: 00 During test: 01 Completed without malfunction: 02 Completed with malfunction: 03 Interrupted: 04 |
- |
|
A/M Servo Targ Pulse (Rear D) |
Rear air mix damper servo motor LH target pulse / Min.: 9 Max.: 54 |
Max cool: 9 (pulse) Max hot: 54 (pulse) |
- |
|
A/M Servo Targ Pulse (Rear P) |
Rear air mix damper servo motor RH target pulse / Min.: 8 Max.: 53 |
Max cool: 53 (pulse) Max hot: 8 (pulse) |
- |
|
Foot Duct Sensor (Rear D) |
DUCT SENSOR / Min.: -12.7°C (9.14°F) Max.: 76.55°C (169.79°F) |
Actual temperature measured by duct sensor LH displayed |
Open in the circuit: -30°C (86°F). Short in the circuit: 80.6°C (177°F). |
|
Foot Duct Sensor (Rear P) |
DUCT SENSOR / Min.: -12.7°C (9.14°F) Max.: 76.55°C (169.79°F) |
Actual temperature measured by duct sensor RH displayed |
Open in the circuit: -30°C (86°F). Short in the circuit: 80.6°C (177°F). |
|
Number of Trouble Codes |
Number of trouble codes / Min.: 0, Max.: 255 |
Number of DTCs 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. 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 engine switch on (IG).
(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 sub-assembly (with FAN) |
Min.: 0, Max.: 31 |
- |
|
Magnetic Clutch Relay |
Magnetic clutch relay |
ON or OFF |
- |
|
Electrical Fan |
Condenser fan |
ON or OFF |
- |
|
Heater Active Level |
Heater level |
Min.: 0, Max.: 3 |
- |
|
Air Mix Servo Targ Pulse(D) |
Air mix servo motor pulse (Front A/C rear air flow driver side) |
Min.: 8, Max.: 90 |
- |
|
Air Mix Servo Targ Pulse(P) |
Air mix servo motor pulse (Front A/C rear air flow passenger side) |
Min.: 8, Max.: 90 |
- |
|
Air Inlet Damper Targ Pulse |
Air inlet damper target pulse |
Min.: 9, Max.: 37 |
- |
|
Cool Air Bypass Pulse |
Cool air bypass pulse |
Min.: 6, Max.: 57 |
- |
|
Rear Blower Motor |
Rear blower motor sub-assembly (with FAN) |
Min.: 0, Max.: 31 |
- |
|
Rear Air Mix Servo Targ Pulse |
Rear air mix servo motor pulse |
Min.: 8, Max.: 54 |
- |
|
Rear A/C Mag Valve |
Rear cooling unit expansion valve |
ON or OFF |
- |
|
Face A/O Servo Pulse(D) |
Air outlet servo motor pulse (Driver side) |
Min.: 6, Max.: 117 |
- |
|
Face A/O Servo Pulse(P) |
Air outlet servo motor pulse (Passenger side) |
Min.: 6, Max.: 117 |
- |
|
A/M Servo Puls(F&R D) |
Air mix servo motor pulse (Front A/C rear air flow driver side) |
Min.: 13, Max.: 41 |
- |
|
A/M Servo Puls(F&R P) |
Air mix servo motor pulse (Front A/C rear air flow passenger side) |
Min.: 5, Max.: 33 |
- |
|
A/O Servo Pulse(F&R D) |
Air outlet servo motor pulse (Front A/C rear air flow driver side) |
Min.: 9, Max.: 79 |
- |
|
A/O Servo Pulse(Rr D) |
Air outlet servo motor pulse (Rear driver side) |
Min.: 7, Max.: 83 |
- |
|
Rear Air Mix Servo Target Pulse |
Air mix damper servo motor pulse (Rear driver side) |
Min.: 9, Max.: 54 |
- |
|
Rear A/M Servo Pulse (P) |
Air mix damper servo motor pulse (Rear passenger side) |
Min.: 8, Max.: 53 |
- |
|
|