Air Conditioning (Diagnostics - Introduction): Diagnosis Lexus LX J200

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use these procedures to troubleshoot the air conditioning system.
2. *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. INSPECT BATTERY VOLTAGE Standard voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding. NEXT: Go to next step
3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* Use the Techstream to check if the CAN communication system is functioning normally. RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B --> GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-385222-S11207754182011021400000) A: Go to next step
4. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* Use the Techstream to check if the LIN communication system is functioning normally. RESULT Result Proceed to LIN DTC is not output A LIN DTC is output B B --> GO TO LIN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-385260-S34270381782011021400000) A: Go to next step
5. CHECK FOR DTC* Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-385206-S26008362402011021400000) . Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-385206-S26008362402011021400000) . Based on the DTCs output above, try to force output of the air conditioning system DTC by simulating the conditions indicated by the DTC. Then recheck for DTCs. RESULT Result Proceed to DTC is not output A DTC is output B B --> GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-385206-S17280359482011021400000) A: Go to next step
6. PROBLEM SYMPTOMS TABLE Refer to the Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE»(ref-385206-S13444969122011021400000) . RESULT Result Proceed to Fault is not listed in problem symptoms table A Fault is listed in problem symptoms table B B --> GO TO STEP 8 A: Go to next step
7. OVERALL ANALYSIS AND TROUBLESHOOTING* Terminals of ECU. Refer to «TERMINALS OF ECU»(ref-385206-S02364898282011021400000) Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST»(ref-385206-S04545405032011021400000) Actuator Check. Refer to «ACTUATOR CHECK»(ref-385324-S29783433702011021400000) On-vehicle Inspection Inspection NEXT: Go to next step
8. ADJUST, REPAIR OR REPLACE NEXT: Go to next step
9. CONFIRMATION TEST NEXT --> END

PROBLEM SYMPTOMS TABLE

HINT

1. Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

FRONT AIR CONDITIONING UNIT

REAR AIR CONDITIONING UNIT

COOLING BOX

1. *1: w/ Navigation System

1. *2: w/o Navigation System

1. *3: w/ PTC Heater

1. *4: w/ Cool Box

Scheme 231

Scheme 232

Scheme 233

Scheme 234

Scheme 235

Scheme 236

1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY Disconnect the E36, E35 and z45 air conditioning amplifier connectors. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E36-6 (+B1) - E36-1 (GND) R - W-B Battery power source Always 11 to 14 V E36-7 (+B2) - E36-1 (GND) R - W-B Battery power source Always 11 to 14 V z45-3 (B BUS) - z45-1 (BUS G) - Power supply for BUS IC (for front) Always 11 to 14 V z45-10 (B BUS) - z45-8 (BUS G) - Power supply for BUS IC (for front) Always 11 to 14 V E36-5 (IG+) - E36-1 (GND) G - W-B Ignition power supply Engine switch on (IG) 11 to 14 V Engine switch off Below 1 V E36-14 (RBBU) - E36-12 (RBUG) L - BR Power supply for BUS IC (for rear) Always 11 to 14 V E35-25 (TR3) - Body ground V - Body ground Ground Engine switch on (IG) Driver side duct sensor temperature: 25°C (77°F) 5000 +/-150 ohms E35-26 (TR4) - Body ground W - Body ground Ground Engine switch on (IG) Passenger side duct sensor temperature: 25°C (77°F) 5000 +/-150 ohms E35-16 (SG-2) - Body ground G - Body ground Ground for pressure sensor Always Below 1 ohms E35-29 (SG-5) - Body ground G - Body ground Ground for compressor signal Always Below 1 ohms E36-2 (E1) - Body ground W-B - Body ground Ground Always Below 1 ohms E36-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms E35-6 (E2) - Body ground W-B - Body ground Ground Always Below 1 ohms E35-32 (SG-1) - Body ground B - Body ground Ground for room temperature sensor (for front) Always Below 1 ohms z45-6 (SGA) - Body ground - Ground for evaporator temperature sensor Always Below 1 ohms z45-1 (BUS G) - Body ground - Ground for BUS IC (for front) Always Below 1 ohms z45-8 (BUS G) - Body ground - Ground for BUS IC (for front) Always Below 1 ohms E35-34 (SGND) - Body ground BR - Body ground Ground for duct sensor (for driver side) Always Below 1 ohms E35-12 (SG-9) - Body ground L - Body ground Ground for duct sensor (for passenger side) Always Below 1 ohms E35-2 (SG-6) - Body ground G - Body ground Ground for room temperature sensor signal (for rear LH and rear RH) Always Below 1 ohms E36-12 (RBUG) - Body ground BR - Body ground Ground for BUS IC (for rear) Always Below 1 ohms E35-1 (SG) - Body ground P - Body ground Ground for evaporator temperature sensor signal (for rear) Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the E36, E35 and z45 air conditioning amplifier connectors. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E36-25 (CFN+) - Body ground R - Body ground Condenser FAN operation signal Engine switch on (IG) 11 to 14 V E36-33 (COOL) - Body ground W - Body ground Cool box operation signal Engine switch on (IG) Cool box switch on Below 1 V Engine switch on (IG) Cool box switch off 11 to 14 V E36-29 (AC1) - Body ground L - Body ground Compressor operation signal Engine switch on (IG) A/C switch off 11 to 14 V Engine switch on (IG) A/C switch on Below 1 V E36-22 (ACT) - Body ground G - Body ground Compressor operation signal Engine switch on (IG) ACT signal off 4.5 to 5.5 V Engine switch on (IG) ACT signal on Below 1 V E35-28 (LOCK) - E35-29 (SG-5) L - G Air compressor lock sensor signal Engine idling A/C switch on Blower switch lo Pulse generation ( see scheme 22waveform 1) E35-10 (TAM) - E35-16 (SG-2) V - G Ambient temperature sensor signal Engine switch on (IG) Ambient temperature: 25°C (77°F) 1.4 to 1.6 V Engine switch on (IG) Ambient temperature: 50°C (122°F) 0.7 to 0.9 V E35-27 (S5-1) - E35-16 (SG-2) LG - G Power supply for pressure sensor Engine switch on (IG) 4.5 to 5.5 V E35-20 (PRE) - E35-16 (SG-2) R - G Air conditioning pressure sensor signal Refrigerant pressure: Normal pressure (less than 3.0732 MPa [31.4 kgf/cm 2, 445 psi] and more than 0.1762 MPa [1.8 kgf/cm 2, 25 psi]) 1.0 to 4.8 V Refrigerant pressure: Abnormal (less than 0.1762 MPa [1.8 kgf/cm 2, 25 psi]) Below 1 V Refrigerant pressure: Abnormal (more than 3.0732 MPa [31.4 kgf/cm 2, 445 psi]) 4.8 V or higher E36-18 (MGC) - E36-1 (GND) R - W-B A/C compressor magnetic clutch operation signal Engine idling Blower switch lo A/C switch on Below 1 V E36-3 (BLW) - E36-1 (GND) R - W-B Blower motor control signal Engine switch on (IG) Blower switch lo Pulse generation ( see scheme 23waveform 2) E35-30 (SG-4) - E35-23 (DGS) L - L Exhaust gas sensor signal (CO, HC) 30 seconds after engine switch on (IG) and sensor exposed to exhaust gas 1.0 to 4.5 V E35-30 (SG-4) - E35-24 (DGS1) L - W Exhaust gas sensor signal (NOx) 30 seconds after engine switch on (IG) and sensor exposed to exhaust gas 1.0 to 4.5 V E35-9 (TR) - E35-32 (SG-1) W - B Room temperature sensor signal (for front) Engine switch on (IG) Front side interior temperature: 25°C (77°F) 1.9 to 2.1 V Room temperature sensor signal (for front) Engine switch on (IG) Front side interior temperature: 50°C (122°F) 1.0 to 2.0 V E35-7 (TSD) - Body ground LG - Body ground Driver side solar sensor signal Engine switch on (IG) Solar sensor subjected to electric light 0.8 to 4.3 V E35-8 (TSP) - Body ground GR - Body ground Passenger side solar sensor signal Engine switch on (IG) Solar sensor subjected to electric light 0.8 to 4.3 V z45-7 (TEA) - z45-6 (SGA) - Evaporator temperature sensor signal Engine switch on (IG) Evaporator temperature: 15°C (59°F) 1.0 to 1.2 V z45-2 (BUS) - z45-1 (BUS G) - BUS IC control signal (for front) Engine switch on (IG) Pulse generation z45-9 (BUS) - z45-8 (BUS G) - BUS IC control signal (for front) Engine switch on (IG) Pulse generation E35-18 (TR) - E35-2 (SG-6) R - G Room temperature sensor signal (for rear LH) Engine switch on (IG) Vehicle interior temperature: 25°C (77°F) 1.9 to 2.1 V Engine switch on (IG) Vehicle interior temperature: 50°C (122°F) 1.0 to 1.2 V E35-19 (TR7) - E35-2 (SG-6) R - G Room temperature sensor signal (for rear RH) Engine switch on (IG) Vehicle interior temperature: 25°C (77°F) 1.9 to 2.1 V Engine switch on (IG) Vehicle interior temperature: 50°C (122°F) 1.0 to 1.2 V E36-13 (RBUS) - E36-12 (RBUG) R - BR BUS IC control signal (for rear) Engine switch on (IG) Pulse generation E35-17 (TEC) - E35-1 (SG) W - P Evaporator temperature sensor signal (for rear) Engine switch on (IG) Evaporator temperature: 15°C (59°F) 1.4 to 1.8 V E36-31 (ALT) - Body ground R - Body ground Generator signal Engine idling Pulse generation E36-27 (PTC1) - Body ground R - Body ground PTC1 heater relay operation signal Engine idling Set temperature: Hi Engine coolant temperature: Below 65°C (149°F) Ambient temperature: Below 10°C (50°F) Blower switch off --> lo Below 1 V --> 11 to 14 V E36-26 (PTC2) - Body ground R - Body ground PTC2 heater relay operation signal E36-35 (PTC3) - Body ground R - Body ground PTC3 heater relay operation signal E36-17 (BLWH) - E36-1 (GND) L - W-B Blower motor control signal (for rear) Engine switch on (IG) Blower switch lo Pulse generation ( (Scheme 231)waveform 3) E36-19 (RMGV) - E36-1 (GND) B - W-B Rear cooling unit expansion valve signal Engine switch on (IG) 11 to 14 V If the result is not as specified, the air conditioning amplifier assembly may have a malfunction. Using an oscilloscope, check waveform 1. A/C COMPRESSOR LOCK SENSOR SIGNAL Item Content Terminal No. (Symbol) E35-28 (LOCK) - E35-29 (SG-5) Tool Setting 200 mV/DIV., 10 ms/DIV. Condition Engine is running Blower switch lo A/C switch on HINT: When the rear blower level is increased, the duty ratio changes accordingly. Using an oscilloscope, check waveform 2. BLOWER MOTOR CONTROL SIGNAL Item Content Terminal No. (Symbol) E36-3 (BLW) - E36-1 (GND) Tool Setting 1 V/DIV., 500 μs/DIV. Condition Engine switch on (IG) Blower switch lo HINT: When the blower level is increased, the duty ratio changes accordingly. Using an oscilloscope, check waveform 3. REAR BLOWER MOTOR CONTROL SIGNAL Item Content Terminal No. (Symbol) E36-17 (BLWH) - E36-1 (GND) Tool Setting 1 V/DIV., 500 μs/DIV. Condition Engine switch on (IG) Blower switch lo HINT: When the rear blower level is increased, the duty ratio changes accordingly.
2. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY*1, MULTI-DISPLAY*2 *1: w/ Navigation System *2: w/o Navigation System Disconnect the F28 display connector. Measure the resistance and voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F28-1 (+B1) - F28-10 (GND1) R - W-B Battery Always 11 to 14 V F28-2 (ACC) - F28-10 (GND1) GR - W-B Accessory (ON) Engine switch off Below 1 V F28-2 (ACC) - F28-10 (GND1) GR - W-B Accessory (ON) Engine switch on (ACC) 11 to 14 V F28-3 (IG) - F28-10 (GND1) G - W-B Ignition (ON) Engine switch off Below 1 V F28-3 (IG) - F28-10 (GND1) G - W-B Ignition (ON) Engine switch on (IG) 11 to 14 V F28-10 (GND1) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
3. CHECK NO. 2 AIR CONDITIONING CONTROL ASSEMBLY Disconnect the E55 switch connector. Measure the resistance and voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E55-6 (IG) - E55-1 (E) G - W-B IG power supply Always 11 to 14 V E55-1 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
4. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) Disconnect the 2A, 2D, E1, E2 and E3 ECU connectors. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition 2D-62 (GND2) - Body ground W-B - Body ground Ground Always Below 1 ohms E3-1 (GND3) - Body ground BR - Body ground Ground Always Below 1 ohms 2A-1 (ACC) - 2D-62 (GND2) B - W-B ACC power supply Engine switch off Below 1 V Engine switch on (ACC) 11 to 14 V E1-6 (AM1) - 2D-62 (GND2) W - W-B Battery power supply Always 11 to 14 V E2-1 (AM2) - 2D-62 (GND2) W - W-B Battery power supply Always 11 to 14 V 2A-1 (IG) - 2D-62 (GND2) B - W-B IG power supply Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V If the result is not as specified, there may be a malfunction in the wire harness.

DTC CHECK / CLEAR

1. CHECK DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / (desired system) / Trouble Codes. Read the DTCs.
2. CLEAR DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / (desired system) / Trouble Codes. Clear the DTCs.

Scheme 237

Scheme 238

Scheme 239

1. LIST OF OPERATION METHODS By operating each of the air conditioning control switches as shown in the diagram below, it is possible to enter the diagnostic check mode.
2. INDICATOR CHECK Press and hold the air conditioning system control AUTO switch and recirculation/fresh switch simultaneously, and turn the engine switch on (IG). Continue holding the 2 switches until the panel diagnosis mode begins. HINT: When the above operation is performed, each mode switch indicator light illuminates. For vehicles equipped with a multi-display, each mode switch indicator light illuminates and an operation confirmation buzzer sounds. Check that all indicators turn on and off 4 times in succession at 1 second intervals. HINT: After the indicator check is completed, the system enters the DTC mode automatically. Press the OFF switch to cancel the indicator check.

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. NOTE: 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. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Air Conditioner / Data List. Enter the following menus: Powertrain / Engine and ECT / Data List. 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: -6.5°C (20.3°F). Short in the 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 displayed Open in the circuit: -23.3°C (-9.94°F). Short in the 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 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: -29.7°C (-21.46°F). Short in the circuit: 59.55°C (139.19°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 / MAX COLD: 17.5°C (63.5°F) MAX HOT: 32.5°C (90.5°F) Driver side actual set temperature displayed - Set Temperature (P Side) Passenger side set temperature / MAX COLD: 17.5°C (63.5°F) MAX HOT: 32.5°C (90.5°F) Front passenger side actual set temperature displayed - Hand Free Telephone Handsfree telephone / ON or OFF 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 MPa Max.: 3.2943 MPa 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: -6.5°C (20.3°F). Short in the circuit: 57.25°C (135.05°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: -29.7°C (-21.46°F). Short in the circuit: 59.55°C (139.19°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: -6.5°C (20.3°F). Short in the circuit: 57.25°C (135.05°F). Set Temperature (Rear D side) Rear driver side set temperature / MAX COLD: 17.5°C (63.5°F) MAX HOT: 32.5°C (90.5°F) Rear driver side actual set temperature displayed - Set Temperature (Rear P side) Rear passenger side set temperature / MAX COLD: 17.5°C (63.5°F) MAX HOT: 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: -12.7°C (9.14°F). Short in the circuit: 76.55°C (169.79°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: -12.7°C (9.14°F). Short in the circuit: 76.55°C (169.79°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. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Air Conditioner / Active Test. 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

DIAGNOSTIC TROUBLE CODE CHART

HINT

If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See" below.

AIR CONDITIONING AMPLIFIER

*: The air conditioning amplifier stores the DTC of the respective malfunction that has occurred for the period of time indicated in the brackets.