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Air Conditioning (Diagnostic Codes & Circuit Tests): Other Lexus RX III

Automatic HVAC System 2 illustrations ~12633 words

PROCEDURE

  1. READ VALUE USING TECHSTREAM 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. Check the value(s) by referring to the table below. 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 cabin temperature displayed - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 5 B --> See step 4 A: Go to next step
  2. INSPECT ROOM TEMPERATURE SENSOR Remove the room temperature sensor. Disconnect the room temperature sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F26-1 - F26-2 10°C (50°F) 3.00 to 3.73 kohms F26-1 - F26-2 15°C (59°F) 2.45 to 2.88 kohms F26-1 - F26-2 20°C (68°F) 1.95 to 2.30 kohms F26-1 - F26-2 25°C (77°F) 1.60 to 1.80 kohms F26-1 - F26-2 30°C (86°F) 1.28 to 1.47 kohms F26-1 - F26-2 35°C (95°F) 1.00 to 1.22 kohms F26-1 - F26-2 40°C (104°F) 0.80 to 1.00 kohms F26-1 - F26-2 45°C (113°F) 0.65 to 0.85 kohms F26-1 - F26-2 50°C (122°F) 0.50 to 0.70 kohms F26-1 - F26-2 55°C (131°F) 0.44 to 0.60 kohms F26-1 - F26-2 60°C (140°F) 0.36 to 0.50 kohms NOTE: Hold the sensor only by its connector. Touching the sensor may change the resistance value. When measuring, the sensor temperature must be the same as the ambient temperature. HINT: As the temperature increases, the resistance decreases ( see scheme 6the graph). TEXT IN ILLUSTRATION *1 Component without harness connected (Room Temperature Sensor) *2 Sensing Portion NG --> See step 6 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (ROOM TEMPERATURE SENSOR - A/C AMPLIFIER) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-29 (TR) - F26-1 Always Below 1 ohms F50-34 (SG-1) - F26-2 Always Below 1 ohms F50-29 (TR) - Body ground Always 10 kohms or higher F50-34 (SG-1) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to Room Temperature Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
  4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  5. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  6. REPLACE ROOM TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-400783-S11535062002011051800000)
  1. READ VALUE USING TECHSTREAM 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. Check the value(s) by referring to the table below. 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 displayed - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 5 B --> See step 4 A: Go to next step
  2. INSPECT AMBIENT TEMPERATURE SENSOR Remove the ambient temperature sensor. Disconnect the ambient temperature sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A3-1 - A3-2 10°C (50°F) 3.00 to 3.73 kohms A3-1 - A3-2 15°C (59°F) 2.45 to 2.88 kohms A3-1 - A3-2 20°C (68°F) 1.95 to 2.30 kohms A3-1 - A3-2 25°C (77°F) 1.60 to 1.80 kohms A3-1 - A3-2 30°C (86°F) 1.28 to 1.47 kohms A3-1 - A3-2 35°C (95°F) 1.00 to 1.22 kohms A3-1 - A3-2 40°C (104°F) 0.80 to 1.00 kohms A3-1 - A3-2 45°C (113°F) 0.65 to 0.85 kohms A3-1 - A3-2 50°C (122°F) 0.50 to 0.70 kohms A3-1 - A3-2 55°C (131°F) 0.44 to 0.60 kohms A3-1 - A3-2 60°C (140°F) 0.36 to 0.50 kohms NOTE: Hold the sensor only by its connector. Touching the sensor may change the resistance value. When measuring, the sensor temperature must be the same as the ambient temperature. HINT: As the temperature increases, the resistance decreases ( see scheme 14the graph). TEXT IN ILLUSTRATION *1 Component without harness connected (Ambient Temperature Sensor) *2 Sensing Portion NG --> See step 6 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (AMBIENT TEMPERATURE SENSOR - A/C AMPLIFIER) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-5 (TAM) - A3-2 Always Below 1 ohms F50-13 (SG-2) - A3-1 Always Below 1 ohms F50-5 (TAM) - Body ground Always 10 kohms or higher F50-13 (SG-2) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to Ambient Temperature Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
  4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  5. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  6. REPLACE AMBIENT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-400783-S42712404022011051800000)
  1. READ VALUE USING TECHSTREAM 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. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Evaporator Fin Thermistor Evaporator temperature sensor / Min.: -29.7°C (-21.46°F) Max.: 59.55°C (139.19°F) Actual evaporator temperature displayed - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 4 B --> See step 5 A: Go to next step
  2. INSPECT EVAPORATOR TEMPERATURE SENSOR Remove the evaporator temperature sensor. Disconnect the evaporator temperature sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition z16-1 - z16-2 -10°C (14°F) 7.30 to 9.10 kohms z16-1 - z16-2 -5°C (23°F) 5.65 to 6.95 kohms z16-1 - z16-2 0°C (32°F) 4.40 to 5.35 kohms z16-1 - z16-2 5°C (41°F) 3.40 to 4.15 kohms z16-1 - z16-2 10°C (50°F) 2.70 to 3.25 kohms z16-1 - z16-2 15°C (59°F) 2.14 to 2.58 kohms z16-1 - z16-2 20°C (68°F) 1.71 to 2.05 kohms z16-1 - z16-2 25°C (77°F) 1.38 to 1.64 kohms z16-1 - z16-2 30°C (86°F) 1.11 to 1.32 kohms NOTE: Hold the sensor only by its connector. Touching the sensor may change the resistance value. When measuring, the sensor temperature must be the same as the ambient temperature. HINT: As the temperature increases, the resistance decreases ( see scheme 22the graph). TEXT IN ILLUSTRATION *1 Component without harness connected (Evaporator Temperature Sensor) *2 Sensing Portion NG --> See step 7 OK: Go to next step
  3. INSPECT AIR CONDITIONING HARNESS (A/C AMPLIFIER - EVAPORATOR TEMPERATURE SENSOR) Remove the air conditioning harness. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition z6-6 (TE) - z16-2 Always Below 1 ohms z6-5 (SG) - z16-1 Always Below 1 ohms z6-6 (TE) - Body ground Always 10 kohms or higher z6-5 (SG) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to Evaporator Temperature Sensor) NG --> See step 8 OK --> See step 6
  4. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  7. REPLACE EVAPORATOR TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-400783-S12543499412011051800000)
  8. REPLACE AIR CONDITIONING HARNESS. Refer to «DISASSEMBLY»(ref-400783-S05848131902011051800000)
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Allow exhaust gas (HC, CO) to travel to the sensing portion of the smog ventilation sensor. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Emission Gas Sensor Emission gas (HC, CO) / Min.: 0 Max.: 255 Smog ventilation sensor value increases as gas amount increases - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 8 B --> See step 7 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (SMOG VENTILATION SENSOR - BODY GROUND) Disconnect the smog ventilation sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B2-6 (E) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Smog Ventilation Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (SMOG VENTILATION SENSOR - BATTERY) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition B2-3 (IG) - Body ground Engine switch on (IG) 11 to 14 V B2-3 (IG) - Body ground Engine switch off Below 1 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Smog Ventilation Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. INSPECT SMOG VENTILATION SENSOR Remove the smog ventilation sensor. Connect a battery positive (+) lead to terminal 3 (IG) and a negative (-) lead to terminal 6 (E). Allow exhaust gas (HC, CO) to travel to the sensing portion of the smog ventilation sensor, and measure the resistance between terminals 1 (SG) and 2 (DGS). OK When the sensor is exposed to the exhaust gas, the resistance increases. HINT: The resistance before blowing exhaust gas is 10 kohms to 40 kohms. TEXT IN ILLUSTRATION *1 Component without harness connected (Smog Ventilation Sensor) NG --> See step 9 OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (SMOG VENTILATION SENSOR - A/C AMPLIFIER) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B2-1 (SG) - F50-13 (SG-2) Always Below 1 ohms B2-2 (DGS) - F50-6 (DGS) Always Below 1 ohms F50-13 (SG-2) - Body ground Always 10 kohms or higher F50-6 (DGS) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to Smog Ventilation Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  7. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  8. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  9. REPLACE SMOG VENTILATION SENSOR. Refer to «REMOVAL»(ref-400783-S39049165952011051800000)
  1. CHECK 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 --> See step 4 A: Go to next step
  2. INSPECT A/C COMPRESSOR (A/C LOCK SENSOR) Disconnect the A/C compressor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D7-1 (SSR+) - D7-2 (SSR-) 20°C (68°F) 160 to 320 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (A/C Compressor) NG --> See step 7 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - A/C LOCK SENSOR) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-8 (LOCK) - D7-1 (SSR+) Always Below 1 ohms F50-13 (SG-2) - D7-2 (SSR-) Always Below 1 ohms F50-8 (LOCK) - Body ground Always 10 kohms or higher F50-13 (SG-2) - Body ground Always 10 kohms or higher Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to A/C Compressor) C --> See step 6 B --> See step 5 A --> REPAIR OR REPLACE HARNESS OR CONNECTOR
  4. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-400834-S34883510432011051800000)
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  7. REPLACE A/C COMPRESSOR (A/C LOCK SENSOR). Refer to «REMOVAL»(ref-400783-S04470433622011051800000)
  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the A/C pressure sensor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A7-3 (+) - Body ground Engine switch on (IG) 4.75 to 5.25 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Pressure Sensor) NG --> See step 5 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A7-1 (-) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Pressure Sensor) NG --> See step 6 OK: Go to next step
  3. INSPECT A/C PRESSURE SENSOR (SENSOR SIGNAL CIRCUIT) Reconnect the A/C pressure sensor connector. Remove the A/C amplifier with the connectors still connected. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F50-9 (PRE) - Body ground Engine switch on (IG) (A/C: off) 0.73 to 4.84 V HINT: If the voltage is not as specified, there may be a malfunction in the A/C amplifier, A/C pressure sensor or wire harness. It is also possible that the amount of refrigerant may not be appropriate. TEXT IN ILLUSTRATION *1 Component with harness connected (A/C Amplifier) NG --> See step 7 OK: Go to next step
  4. INSPECT A/C PRESSURE SENSOR (SENSOR SIGNAL CIRCUIT) Measure the voltage when the following conditions are satisfied. Item Condition Vehicle Doors Fully open Temperature Setting MAX COLD Blower Speed HI A/C Switch on R/F Switch RECIRCULATION Interior Temperature 25 to 35°C (77 to 95°F) Engine Speed 2000 RPM NOTE: If refrigerant pressure on the high pressure line becomes extremely high during the inspection (if the voltage exceeds 4.84 V), the fail-safe function stops compressor operation. Therefore, measure the voltage before the fail-safe function operates. It is necessary to measure the voltage over a period of time (approximately 10 minutes) because the problem symptom may recur after a while. HINT: When the outside air temperature is low (below -1.5°C (29.3°F)), the compressor stops due to signals from the ambient temperature sensor and the evaporator temperature sensor to prevent the evaporator from freezing. In this case, perform the inspection in a warm indoor environment. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F50-9 (PRE) - Body ground Engine switch on (IG) (A/C: on) 0.73 to 4.84 V Result Result Proceed to OK (When troubleshooting according to the DTC) A OK (When troubleshooting according to Problem Symptoms Table) B NG C TEXT IN ILLUSTRATION *1 Component with harness connected (A/C Amplifier) C --> See step 13 B --> See step 19 A --> See step 20
  5. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - A/C PRESSURE SENSOR) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A7-3 (+) - F50-10 (S5-3) Always Below 1 ohms F50-10 (S5-3) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to A/C Pressure Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 20
  6. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - A/C PRESSURE SENSOR) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A7-1 (-) - F50-13 (SG-2) Always Below 1 ohms F50-13 (SG-2) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to A/C Pressure Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 20
  7. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - A/C PRESSURE SENSOR) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A7-2 (PR) - F50-9 (PRE) Always Below 1 ohms F50-9 (PRE) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to A/C Pressure Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  8. CHECK FOR A/C SYSTEM LEAK Install the manifold gauge set. Recover the refrigerant from the A/C system using a refrigerant recovery unit. Evacuate the A/C system and check that vacuum can be maintained. OK Vacuum can be maintained in the A/C system. HINT: If vacuum cannot be maintained in the A/C system, there may be a refrigerant leak. In this case, it is necessary to repair or replace the leaking part of the A/C system. NG --> See step 12 OK: Go to next step
  9. CHARGE REFRIGERANT Add an appropriate amount of refrigerant. Refer to «REPLACEMENT - Step 2»(ref-400783-S08693988022011051800000) . NEXT: Go to next step
  10. RECHECK FOR DTC Recheck for the DTC when the following conditions are satisfied. Item Condition Vehicle Doors Fully open Temperature Setting MAX COLD Blower Speed HI A/C Switch on R/F Switch RECIRCULATION Interior Temperature 25 to 35°C (77 to 95°F) Engine Speed 2000 RPM NOTE: If refrigerant pressure on the high pressure line is excessive, this DTC will be set. Therefore, it is necessary to measure the voltage over a period of time (approximately 10 minutes) because this DTC may be set after the A/C has been operating for a while. HINT: When the outside air temperature is low (below -1.5°C (29.3°F)), the compressor stops due to signals from the ambient temperature sensor and the evaporator temperature sensor to prevent the evaporator from freezing. In this case, perform the inspection in a warm indoor environment. Result Result Proceed to DTC B1423/23 is output A DTC B1423/23 is not output B NOTE: If the DTC was set due to an insufficient or excessive amount of refrigerant, the problem may have been solved after performing the previous step. However, the root cause of insufficient refrigerant may be refrigerant leaks. The root cause of excessive refrigerant may be adding refrigerant when the level was insufficient. Therefore, identify and repair any refrigerant leaks as necessary. B --> END A: Go to next step
  11. INSPECT A/C PRESSURE SENSOR Install the manifold gauge set. Reconnect the A/C pressure sensor connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F50-9 (PRE) - F50-13 (SG-2) Refrigerant pressure: Normal pressure (less than 3.187 MPa [462 psi] and more than 0.39 MPa [57 psi]) 1.0 to 4.912 V TEXT IN ILLUSTRATION *1 Component with harness connected (A/C Amplifier) NG --> See step 24 OK --> See step 20
  12. REPAIR A/C SYSTEM LEAK Identify the area where refrigerant leaks from. Refer to «REPLACEMENT - Step 4»(ref-400783-S08693988022011051800000) . Repair the identified area of the A/C system. Evacuate the A/C system. NEXT --> See step 21
  13. INSPECT COOLING FAN SYSTEM Check that the cooling fan(s) operates normally. HINT: Refer to Cooling Fan Circuit. Refer to «Cooling Fan Circuit»(ref-400828-S33124254942011051800000) . NG --> REPAIR COOLING FAN SYSTEM OK: Go to next step
  14. CHARGE REFRIGERANT Use a refrigerant recovery unit to recover refrigerant. Evacuate the A/C system. Add an appropriate amount of refrigerant. Refer to «REPLACEMENT - Step 2»(ref-400783-S08693988022011051800000) . HINT: If refrigerant is added and the system has not been properly evacuated (insufficient vacuum time), moisture in the air remaining in the system will freeze in the expansion valve, blocking the flow on the high pressure side. Therefore, recover the refrigerant and properly evacuate the system. Add an appropriate amount of refrigerant, and check for DTCs. NEXT: Go to next step
  15. RECHECK FOR DTC Recheck for the DTC when the following conditions are satisfied. Item Condition Vehicle Doors Fully open Temperature Setting MAX COLD Blower Speed HI A/C Switch on R/F Switch RECIRCULATION Interior Temperature 25 to 35°C (77 to 95°F) Engine Speed 2000 RPM NOTE: If refrigerant pressure on the high pressure line is excessive, this DTC will be set. Therefore, it is necessary to measure the voltage over a period of time (approximately 10 minutes) because DTC may be set after the A/C has been operating for a while. HINT: When the outside air temperature is low (below -1.5°C (29.3°F)), the compressor stops due to signals from the ambient temperature sensor and the evaporator temperature sensor to prevent the evaporator from freezing. In this case, perform the inspection in a warm indoor environment. If refrigerant is added and the system has not been properly evacuated (insufficient vacuum time), moisture in the air remaining in the system will freeze in the expansion valve, blocking the flow on the high pressure side. Therefore, recover the refrigerant and properly evacuate the system. Add an appropriate amount of refrigerant, and check for the DTC. If the DTC is not output, it indicates that the cooler dryer in the condenser is not able to absorb moisture in the refrigerant. In this case, to complete the repair, it is necessary to replace the cooler dryer. Result Result Proceed to DTC B1423/23 is output A DTC B1423/23 is not output B B --> See step 22 A: Go to next step
  16. REPLACE EXPANSION VALVE Replace the expansion valve with a new or a known good one. Refer to «DISASSEMBLY»(ref-400783-S05848131902011051800000) . HINT: Replace the expansion valve with a new or a known good one because the expansion valve is either stuck or clogged. NEXT: Go to next step
  17. CHARGE REFRIGERANT Add an appropriate amount of refrigerant. Refer to «REPLACEMENT - Step 2»(ref-400783-S08693988022011051800000) . NEXT: Go to next step
  18. RECHECK FOR DTC Recheck for the DTC when the following conditions are satisfied. Item Condition Vehicle Doors Fully open Temperature Setting MAX COLD Blower Speed HI A/C Switch on R/F Switch RECIRCULATION Interior Temperature 25 to 35°C (77 to 95°F) Engine Speed 2000 RPM NOTE: If refrigerant pressure on the high pressure line is excessive, this DTC will be set. Therefore, it is necessary to measure the voltage over a period of time (approximately 10 minutes) because this DTC may be set after the A/C has been operating for a while. HINT: When the outside air temperature is low (below -1.5°C (29.3°F)), the compressor stops due to signals from the ambient temperature sensor and the evaporator temperature sensor to prevent the evaporator from freezing. In this case, perform the inspection in a warm indoor environment. If refrigerant pressure is not normal after replacing the expansion valve with a new or a known good one, the condenser or pipes may be clogged with dirt, dust or other contaminants. In this case, clean or replace the condenser or pipes. Result Result Proceed to DTC B1423/23 is not output A DTC B1423/23 is output B B --> See step 23 A --> END
  19. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  20. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  21. CHARGE REFRIGERANT. Refer to «REPLACEMENT - Step 2»(ref-400783-S08693988022011051800000)
  22. REPLACE COOLER DRYER. Refer to «DISASSEMBLY»(ref-400783-S32650797782011051800000)
  23. REPLACE CONDENSER. Refer to «REMOVAL»(ref-400783-S27455323482011051800000)
  24. REPLACE A/C PRESSURE SENSOR Replace the A/C pressure sensor. Refer to «REMOVAL»(ref-400783-S39611988522011051800000) . HINT: Since the A/C pressure sensor cannot be inspected while it is removed from the vehicle, replace the A/C pressure sensor with a new or a known good one and check that the condition returns to normal. NEXT: Go to next step
  25. RECHECK FOR DTC Recheck for the DTC when the following conditions are satisfied. Item Condition Vehicle Doors Fully open Temperature Setting MAX COLD Blower Speed HI A/C Switch on R/F Switch RECIRCULATION Interior Temperature 25 to 35°C (77 to 95°F) Engine Speed 2000 RPM NOTE: If refrigerant pressure on the high pressure line is excessive, this DTC will be set. Therefore, it is necessary to measure the voltage over a period of time (approximately 10 minutes) because this DTC may be set after the A/C has been operating for a while. HINT: When the outside air temperature is low (below -1.5°C (29.3°F)), the compressor stops due to signals from the ambient temperature sensor and the evaporator temperature sensor to prevent the evaporator from freezing. In this case, perform the inspection in a warm indoor environment. Result Result Proceed to DTC B1423/23 is not output A DTC B1423/23 is output B B --> See step 20 A --> END
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the front passenger side temperature adjustment switch. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Mix Servo Targ Pulse (P) Passenger side air mix servo motor target pulse / Min.: 0, Max.: 255 MAX. COLD: 105 (pulse) MAX. HOT: 7 (pulse) - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 6 B --> See step 5 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM 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. Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Air Mix Servo Targ Pulse (P) Air mix servo motor pulse (P side) Min.: 0, Max.: 255 - OK Air temperature changes in accordance with each control range. NG --> See step 3 OK --> See step 6
  3. INSPECT AIR MIX CONTROL SERVO MOTOR Replace the air mix control servo motor. Refer to «DISASSEMBLY»(ref-400783-S39113695842011051800000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1441/41 is output A DTC B1441/41 is not output B B --> END (AIR MIX CONTROL SERVO MOTOR WAS DEFECTIVE) A: Go to next step
  4. INSPECT AIR CONDITIONING HARNESS Replace the air conditioning harness. Refer to «DISASSEMBLY»(ref-400783-S39113695842011051800000) . HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1441/41 is output A DTC B1441/41 is not output B B --> END (AIR CONDITIONING HARNESS WAS DEFECTIVE) A --> See step 6
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S26530521342011051800000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S15121641442011051800000)
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the front passenger side temperature adjustment switch. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Mix Servo Targ Pulse (P) Passenger side air mix servo motor target pulse / Min.: 0, Max.: 255 MAX. COLD: 105 (pulse) MAX. HOT: 7 (pulse) - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 6 B --> See step 5 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM 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. Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Air Mix Servo Targ Pulse (P) Air mix servo motor pulse (P side) Min.: 0, Max.: 255 - OK Air temperature changes in accordance with each control range. NG --> See step 3 OK --> See step 6
  3. INSPECT AIR MIX CONTROL SERVO MOTOR Replace the air mix control servo motor. Refer to «DISASSEMBLY»(ref-400783-S05848131902011051800000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1441/41 is output A DTC B1441/41 is not output B B --> END (AIR MIX CONTROL SERVO MOTOR WAS DEFECTIVE) A: Go to next step
  4. INSPECT AIR CONDITIONING HARNESS Replace the air conditioning harness. Refer to «DISASSEMBLY»(ref-400783-S05848131902011051800000) . HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1441/41 is output A DTC B1441/41 is not output B B --> END (AIR CONDITIONING HARNESS WAS DEFECTIVE) A --> See step 6
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the R/F (Recirculation/Fresh) switch. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Inlet Damper Targ Pulse Air inlet servo motor target pulse / Min.: 0, Max.: 255 RECIRCULATION: 7 (pulse) FRESH: 28 (pulse) - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 6 B --> See step 5 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM 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. Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Air Inlet Damper Targ Pulse Air inlet damper target pulse Min.: 0, Max.: 255 - OK Recirculation damper position changes in accordance with each control range. NG --> See step 3 OK --> See step 6
  3. INSPECT AIR INLET CONTROL SERVO MOTOR Replace the air inlet control servo motor. Refer to «DISASSEMBLY»(ref-400783-S12145769142011051800000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1442/42 is output A DTC B1442/42 is not output B B --> END (AIR INLET CONTROL SERVO MOTOR WAS DEFECTIVE) A: Go to next step
  4. INSPECT AIR CONDITIONING HARNESS Replace the air conditioning harness. Refer to «DISASSEMBLY»(ref-400783-S39113695842011051800000) . HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1442/42 is output A DTC B1442/42 is not output B B --> END (AIR CONDITIONING HARNESS WAS DEFECTIVE) A --> See step 6
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S26530521342011051800000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S15121641442011051800000)
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the R/F (Recirculation/Fresh) switch. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Inlet Damper Targ Pulse Air inlet servo motor target pulse / Min.: 0, Max.: 255 RECIRCULATION: 7 (pulse) FRESH: 28 (pulse) - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 6 B --> See step 5 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM 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. Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Air Inlet Damper Targ Pulse Air inlet damper target pulse Min.: 0, Max.: 255 - OK Recirculation damper position changes in accordance with each control range. NG --> See step 3 OK --> See step 6
  3. INSPECT AIR INLET CONTROL SERVO MOTOR Replace the air inlet control servo motor. Refer to «DISASSEMBLY»(ref-400783-S12145769142011051800000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1442/42 is output A DTC B1442/42 is not output B B --> END (AIR INLET CONTROL SERVO MOTOR WAS DEFECTIVE) A: Go to next step
  4. INSPECT AIR CONDITIONING HARNESS Replace the air conditioning harness. Refer to «DISASSEMBLY»(ref-400783-S05848131902011051800000) . HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1442/42 is output A DTC B1442/42 is not output B B --> END (AIR CONDITIONING HARNESS WAS DEFECTIVE) A --> See step 6
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the MODE switch. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Outlet Servo Pulse (D) Air outlet servo motor target pulse / Min.: 0, Max.: 255 FACE: 8 (pulse) B/L: 30 to 38 (pulse) FOOT: 50 to 74 (pulse) FOOT/DEF: 80 (pulse) DEF: 97 (pulse) - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 6 B --> See step 5 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM 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. Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Rage Diagnostic Note Air Outlet Servo Pulse (D) Air outlet servo motor pulse Min.: 0, Max.: 255 - OK Air flow position changes in accordance with each control range. NG --> See step 3 OK --> See step 6
  3. INSPECT NO. 1 AIR MIX CONTROL SERVO MOTOR (AIR OUTLET CONTROL SERVO MOTOR) Replace the No. 1 air mix control servo motor (air outlet control servo motor). Refer to «DISASSEMBLY»(ref-400783-S39113695842011051800000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1443/43 is output A DTC B1443/43 is not output B B --> END (AIR OUTLET CONTROL SERVO MOTOR WAS DEFECTIVE) A: Go to next step
  4. INSPECT AIR CONDITIONING HARNESS Replace the air conditioning harness. Refer to «DISASSEMBLY»(ref-400783-S39113695842011051800000) . HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1443/43 is output A DTC B1443/43 is not output B B --> END (AIR CONDITIONING HARNESS WAS DEFECTIVE) A --> See step 6
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S26530521342011051800000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S15121641442011051800000)
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the MODE switch. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Outlet Servo Pulse (D) Air outlet servo motor target pulse / Min.: 0, Max.: 255 FACE: 8 (pulse) B/L: 30 to 38 (pulse) FOOT: 50 to 74 (pulse) FOOT/DEF: 80 (pulse) DEF: 97 (pulse) - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 6 B --> See step 5 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM 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. Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Rage Diagnostic Note Air Outlet Servo Pulse (D) Air outlet servo motor pulse Min.: 0, Max.: 255 - OK Air flow position changes in accordance with each control range. NG --> See step 3 OK --> See step 6
  3. INSPECT NO. 1 AIR MIX CONTROL SERVO MOTOR (AIR OUTLET CONTROL SERVO MOTOR) Replace the No. 1 air mix control servo motor (air outlet control servo motor). Refer to «DISASSEMBLY»(ref-400783-S05848131902011051800000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1443/43 is output A DTC B1443/43 is not output B B --> END (AIR OUTLET CONTROL SERVO MOTOR WAS DEFECTIVE) A: Go to next step
  4. INSPECT AIR CONDITIONING HARNESS Replace the air conditioning harness. Refer to «DISASSEMBLY»(ref-400783-S05848131902011051800000) . HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1443/43 is output A DTC B1443/43 is not output B B --> END (AIR CONDITIONING HARNESS WAS DEFECTIVE) A --> See step 6
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the driver side temperature adjustment switch. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Mix Servo Targ Pulse (D) Driver side air mix servo motor target pulse / Min.: 0, Max.: 255 MAX. COLD: 5 (pulse) MAX. HOT: 103 (pulse) - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 6 B --> See step 5 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM 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. Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Air Mix Servo Targ Pulse (D) Air mix servo motor pulse (D side) Min.: 0, Max.: 255 - OK Air temperature changes in accordance with each control range. NG --> See step 3 OK --> See step 6
  3. INSPECT NO. 1 AIR MIX CONTROL SERVO MOTOR (AIR MIX CONTROL SERVO MOTOR) Replace the No. 1 air mix control servo motor (air mix control servo motor). Refer to «DISASSEMBLY»(ref-400783-S39113695842011051800000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1446/46 is output A DTC B1446/46 is not output B B --> END (AIR MIX CONTROL SERVO MOTOR WAS DEFECTIVE) A: Go to next step
  4. INSPECT AIR CONDITIONING HARNESS Replace the air conditioning harness. Refer to «DISASSEMBLY»(ref-400783-S39113695842011051800000) . HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1446/46 is output A DTC B1446/46 is not output B B --> END (AIR CONDITIONING HARNESS WAS DEFECTIVE) A --> See step 6
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S26530521342011051800000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S15121641442011051800000)
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Operate the driver side temperature adjustment switch. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Mix Servo Targ Pulse (D) Driver side air mix servo motor target pulse / Min.: 0, Max.: 255 MAX. COLD: 5 (pulse) MAX. HOT: 103 (pulse) - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 6 B --> See step 5 A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM 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. Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Air Mix Servo Targ Pulse (D) Air mix servo motor pulse (D side) Min.: 0, Max.: 255 - OK Air temperature changes in accordance with each control range. NG --> See step 3 OK --> See step 6
  3. INSPECT NO. 1 AIR MIX CONTROL SERVO MOTOR (AIR MIX CONTROL SERVO MOTOR) Replace the No. 1 air mix control servo motor (air mix control servo motor). Refer to «DISASSEMBLY»(ref-400783-S05848131902011051800000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1446/46 is output A DTC B1446/46 is not output B B --> END (AIR MIX CONTROL SERVO MOTOR WAS DEFECTIVE) A: Go to next step
  4. INSPECT AIR CONDITIONING HARNESS Replace the air conditioning harness. Refer to «DISASSEMBLY»(ref-400783-S05848131902011051800000) . HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1446/46 is output A DTC B1446/46 is not output B B --> END (AIR CONDITIONING HARNESS WAS DEFECTIVE) A --> See step 6
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  1. INSPECT A/C COMPRESSOR (SOLENOID VALVE) Disconnect the A/C compressor (solenoid valve) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D9-2 (SOL+) - D9-1 (SOL-) 20°C (68°F) 10 to 11 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (A/C Compressor (Solenoid Valve)) NG --> See step 6 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR (SOLENOID VALVE) - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D9-1 (SOL-) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Compressor (Solenoid Valve)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR (SOLENOID VALVE) - A/C AMPLIFIER) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-2 (SOL+) - D9-2 (SOL+) Always Below 1 ohms F50-2 (SOL+) - Body ground Always 10 kohms or higher Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to A/C Compressor (Solenoid Valve)) C --> See step 5 B --> See step 4 A --> REPAIR OR REPLACE HARNESS OR CONNECTOR
  4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  5. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  6. REPLACE A/C COMPRESSOR (SOLENOID VALVE). Refer to «REMOVAL»(ref-400783-S04470433622011051800000)
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Allow exhaust gas (NOx) to travel to the sensing portion of the smog ventilation sensor. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Emission Gas Nox Sensor Emission gas (Nox) / Min.: 0 Max.: 255 Smog ventilation sensor value increases as gas amount increases - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 8 B --> See step 7 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (SMOG VENTILATION SENSOR - BODY GROUND) Disconnect the smog ventilation sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B2-6 (E) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Smog Ventilation Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (SMOG VENTILATION SENSOR - BATTERY) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition B2-3 (IG) - Body ground Engine switch on (IG) 11 to 14 V B2-3 (IG) - Body ground Engine switch off Below 1 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Smog Ventilation Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. INSPECT SMOG VENTILATION SENSOR Remove the smog ventilation sensor. Connect a battery positive (+) lead to terminal 3 (IG) and a negative (-) lead to terminal 6 (E). Allow exhaust gas (NOx) to travel to the sensing portion of the smog ventilation sensor, and measure the resistance between terminals 1 (SG) and 4 (DGS1). OK When the sensor is exposed to the exhaust gas, the resistance increases. HINT: The resistance before blowing exhaust gas is 10 kohms to 40 kohms. TEXT IN ILLUSTRATION *1 Component without harness connected (Smog Ventilation Sensor) NG --> See step 9 OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (SMOG VENTILATION SENSOR - A/C AMPLIFIER) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B2-1 (SG) - F50-13 (SG-2) Always Below 1 ohms B2-4 (DGS1) - F51-3 (DGS1) Always Below 1 ohms F50-13 (SG-2) - Body ground Always 10 kohms or higher F51-3 (DGS1) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to Smog Ventilation Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  7. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  8. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  9. REPLACE SMOG VENTILATION SENSOR. Refer to «REMOVAL»(ref-400783-S39049165952011051800000)
  1. READ VALUE USING TECHSTREAM 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. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Flow Sensor A/C mass flow sensor / Min.: 0 V Max.: 5 V A/C on, Blower switch HI: 0.7 to 3.8 V A/C off, Blower switch off: 3.8 to 4.2 V A/C mass flow sensor is malfunctioning when a constant value between 0.7 and 4.2 V is displayed continuously for more than 4 seconds. OK The display is as specified in the Normal Condition column. Result Result Proceed to OK (When troubleshooting according to Problem Symptoms Table) A OK (When troubleshooting according to the DTC) B NG (When a constant value between 0.7 and 4.2 V is displayed continuously for more than 4 seconds) C C --> See step 3 B --> See step 5 A: Go to next step
  2. READ VALUE USING TECHSTREAM 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. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note A/C Cutoff Signal A/C control cutoff signal / OFF or ON A/C switch on: OFF A/C switch off: ON - Result Result Proceed to Value in Data List indicates OFF A Value in Data List indicates ON B B --> See step 6 A: Go to next step
  3. REPLACE A/C COMPRESSOR (A/C MASS FLOW SENSOR) Replace the A/C compressor (A/C mass flow sensor). Refer to «REMOVAL»(ref-400783-S04470433622011051800000) . HINT: Since the A/C compressor (A/C mass flow sensor) cannot be inspected while it is removed from the vehicle, replace the A/C compressor (A/C mass flow sensor) with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1479/79 is not output A DTC B1479/79 is output B B --> See step 4 A --> END
  4. CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR (A/C MASS FLOW SENSOR) - A/C AMPLIFIER) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-7 (FLOQ) - D10-3 (QUFL) Always Below 1 ohms F50-13 (SG-2) - D10-2 (SGFL) Always Below 1 ohms F50-30 (S5-1) - D10-1 (S5FL) Always Below 1 ohms F50-7 (FLOQ) - Body ground Always 10 kohms or higher F50-13 (SG-2) - Body ground Always 10 kohms or higher F50-30 (S5-1) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to A/C Compressor (A/C Mass Flow Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
  5. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  6. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  1. INSPECT A/C AMPLIFIER Remove the A/C amplifier with the connectors still connected. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition z6-2 (BUS G) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component with harness connected (A/C Amplifier) NG --> See step 4 OK: Go to next step
  2. INSPECT A/C AMPLIFIER Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition z6-4 (B BUS) - z6-2 (BUS G) Engine switch off Below 1 V z6-4 (B BUS) - z6-2 (BUS G) Engine switch on (IG) 11 to 14 V z6-3 (BUS) - z6-2 (BUS G) Engine switch on (IG) Pulse generation TEXT IN ILLUSTRATION *1 Component with harness connected (A/C Amplifier) NG --> See step 5 OK --> See step 3
  3. REPLACE AIR CONDITIONING HARNESS. Refer to «DISASSEMBLY»(ref-400783-S05848131902011051800000)
  4. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  5. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)

Scheme 329

Scheme 329: DESCRIPTION
Scheme 329: DESCRIPTION

The solar sensor is installed on the upper side of the instrument panel. It detects sunlight to control air conditioning AUTO mode. The output voltage from the solar sensor varies in accordance with the amount of sunlight. When the amount of sunlight increases, the output voltage increases. As the sunlight decreases, the output voltage decreases. The A/C amplifier detects changes in the output voltage from the solar sensor.

DTC No.DTC Detection ConditionTrouble Area
B14A2Short in driver side solar sensor circuitSolar sensor Harness or connector between solar sensor and A/C amplifier Harness or connector between solar sensor and main body ECU Main body ECU A/C amplifier

Scheme 330

Scheme 330: WIRING DIAGRAM
Scheme 330: WIRING DIAGRAM
  1. READ VALUE USING TECHSTREAM 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. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Solar Sensor (D side) Driver side solar sensor / Min.: 0 Max.: 255 Driver side solar sensor value increases as brightness increases - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 7 B --> See step 6 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the solar sensor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H3-6 (CLTB) - H3-3 (CLTE) Engine switch off Below 1 V H3-6 (CLTB) - H3-3 (CLTE) Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Solar Sensor) NG --> See step 5 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (SOLAR SENSOR - A/C AMPLIFIER) Disconnect the solar sensor connector. Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-33 (TSD) - H3-1 (TSL) Always Below 1 ohms F50-33 (TSD) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Solar Sensor) *2 Front view of wire harness connector (to A/C Amplifier) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. INSPECT SOLAR SENSOR Remove the solar sensor. Reconnect the solar sensor connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H3-1 (TSL) - H3-3 (CLTE) Sensor is exposed to electric light 0.8 to 4.3 V H3-1 (TSL) - H3-3 (CLTE) Sensor is covered with a cloth Below 0.8 V NOTE: The connection procedure for using a digital tester such as a TOYOTA electrical tester is shown above. When using an analog tester, connect the negative (-) lead to terminal 2 and the positive (+) lead to terminal 6 of the solar sensor. While using the battery during inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur. HINT: Use an incandescent light for inspection. Bring it within about 30 cm (11.8 in.) of the solar sensor. As the inspection light is moved away from the sensor, the voltage decreases. TEXT IN ILLUSTRATION *1 Component with harness connected (Solar Sensor) NG --> See step 8 OK --> See step 7
  5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SOLAR SENSOR) Disconnect the main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F13-20 (CLTB) - H3-6 (CLTB) Always Blow 1 ohms F13-22 (CLTE) - H3-3 (CLTE) Always Blow 1 ohms F13-20 (CLTB) - Body ground Always 10 kohms or higher F13-22 (CLTE) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Main Body ECU) *2 Front view of wire harness connector (to Solar Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
  6. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  7. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  8. REPLACE SOLAR SENSOR. Refer to «REMOVAL»(ref-400783-S27834484902011051800000)
  9. REPLACE MAIN BODY ECU. Refer to «REMOVAL»(ref-400866-S25394726942011051800000)
  1. READ VALUE USING TECHSTREAM 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. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Solar Sensor (P Side) Passenger side solar sensor / Min.: 0 Max.: 255 Passenger side solar sensor value increases as brightness increases - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C C --> See step 7 B --> See step 6 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the solar sensor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H3-6 (CLTB) - H3-3 (CLTE) Engine switch off Below 1 V H3-6 (CLTB) - H3-3 (CLTE) Engine switch on (IG) 11 to 14 V *1 Front view of wire harness connector (to Solar Sensor) NG --> See step 5 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (SOLAR SENSOR - A/C AMPLIFIER) Disconnect the solar sensor connector. Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-32 (TSP) - H3-2 (TSR) Always Below 1 ohms F50-32 (TSP) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Solar Sensor) *2 Front view of wire harness connector (to A/C Amplifier) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. INSPECT SOLAR SENSOR Remove the solar sensor. Reconnect the solar sensor connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition H3-2 (TSR) - H3-3 (CLTE) Sensor is exposed to electric light 0.8 to 4.3 V H3-2 (TSR) - H3-3 (CLTE) Sensor is covered with a cloth Below 0.8 V NOTE: The connection procedure for using a digital tester such as a TOYOTA electrical tester is shown above. When using an analog tester, connect the negative (-) lead to terminal 1 and the positive (+) lead to terminal 6 of the solar sensor. While using the battery during inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur. HINT: Use an incandescent light for inspection. Bring it within about 30 cm (11.8 in.) of the solar sensor. As the inspection light is moved away from the sensor, the voltage decreases. TEXT IN ILLUSTRATION *1 Component with harness connected (Solar Sensor) NG --> See step 8 OK --> See step 7
  5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SOLAR SENSOR) Disconnect the main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F13-20 (CLTB) - H3-6 (CLTB) Always Below 1 ohms F13-22 (CLTE) - H3-3 (CLTE) Always Below 1 ohms F13-20 (CLTB) - Body ground Always 10 kohms or higher F13-22 (CLTE) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Main Body ECU) *2 Front view of wire harness connector (to Solar Sensor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
  6. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  7. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  8. REPLACE SOLAR SENSOR. Refer to «REMOVAL»(ref-400783-S27834484902011051800000)
  9. REPLACE MAIN BODY ECU. Refer to «REMOVAL»(ref-400866-S25394726942011051800000)
  1. GO TO CAN COMMUNICATION SYSTEM HINT: Refer to CAN Communication System. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-400834-S14071915672011051800000) . NEXT --> END
  1. GO TO CAN COMMUNICATION SYSTEM HINT: Refer to CAN Communication System. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-400834-S34883510432011051800000) . NEXT --> END
  1. CONFIRM MODEL Result Result Proceed to w/ Navigation System A w/o Navigation System B B --> See step 5 A: Go to next step
  2. CHECK 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 --> See step 8 A: Go to next step
  3. CHECK AVC-LAN CIRCUIT Check for an open or short in all AVC-LAN circuits. Refer to «AVC-LAN Circuit»(ref-400885-S31240541462011051800000) for DVD. Refer to «AVC-LAN Circuit»(ref-400884-S33591774902011051800000) for HDD). OK There is no open or short circuit. NG --> REPAIR AVC-LAN CIRCUIT OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE, GROUND) Disconnect the radio receiver assembly (A/C control panel) connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition G8-8 (+B) - Body ground Always 11 to 14 V G8-15 (IG+) - Body ground Engine switch off Below 1 V G8-15 (IG+) - Body ground Engine switch on (IG) 11 to 14 V G8-16 (ACC) - Body ground Engine switch off Below 1 V G8-16 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition AC-9 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Radio Receiver Assembly (A/C Control Panel)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
  5. CHECK AVC-LAN CIRCUIT Check for an open or short in all AVC-LAN circuits. Refer to «AVC-LAN Circuit»(ref-400890-S07566949602011051800000) . OK There is no open or short circuit. NG --> REPAIR AVC-LAN CIRCUIT OK: Go to next step
  6. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - ACCESSORY METER ASSEMBLY) Disconnect the A/C amplifier connector. Disconnect the accessory meter assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-37 (LIN1) - G1-20 (LIN1) Always Below 1 ohms F50-37 (LIN1) - Body ground Always 10 k ohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to Accessory Meter Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  7. CHECK HARNESS AND CONNECTOR (POWER SOURCE, GROUND) Disconnect the radio receiver assembly (A/C control panel) connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition G8-8 (+B) - Body ground Always Always 11 to 14 V G8-16 (ACC) - Body ground Engine switch off Below 1 V G8-16 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G8-9 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Radio Receiver Assembly (A/C Control Panel)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
  8. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-400834-S34883510432011051800000)
  9. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  1. PERFORM ACTIVE TEST USING TECHSTREAM 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. Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Blower Motor Blower motor Min.: 0, Max.: 31 - OK Blower motor operates and blower motor speed level changes. Result Result Proceed to OK A NG (Blower motor does not operate) B NG (Blower motor operates but does not change speed) C C --> See step 7 B --> See step 3 A --> See step 2
  2. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  3. CHECK HARNESS AND CONNECTOR (BLOWER MOTOR - BODY GROUND) Disconnect the blower motor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F47-1 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Blower Motor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (BLOWER MOTOR - BATTERY) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F47-3 (+B) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Blower Motor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (BLOWER MOTOR - A/C AMPLIFIER) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-23 (BLW) - F47-2 (SI) Always Below 1 ohms F50-23 (BLW) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) *2 Front view of wire harness connector (to Blower Motor) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  6. INSPECT BLOWER MOTOR Reconnect the blower motor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F50-23 (BLW) - Body ground Always 4.5 to 5.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) NG --> See step 8 OK: Go to next step
  7. INSPECT A/C AMPLIFIER Remove the A/C amplifier. Reconnect the A/C amplifier connector. Turn the engine switch on (IG). Set the blower speed to LO. Measure the waveform between terminal F50-23 (BLW) of the A/C amplifier and body ground. Item Content Tool setting 1 V/DIV., 500 μs/DIV. Vehicle condition Engine switch on (IG) Blower set to LO OK Waveform is as shown in the illustration. HINT: The waveform varies with the blower speed. TEXT IN ILLUSTRATION *1 Component with harness connected (A/C Amplifier) NG --> See step 9 OK --> See step 8
  8. REPLACE BLOWER MOTOR. Refer to «DISASSEMBLY»(ref-400783-S12145769142011051800000)
  9. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  1. CHECK 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 --> See step 12 A: Go to next step
  2. INSPECT RELAY (MG/CLT) Remove the MG/CLT relay from the engine room relay block and junction block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Specified Condition 3 - 5 10 kohms or higher 3 - 5 Below 1 ohms (when battery voltage is applied to terminals 1 and 2) NG --> REPLACE RELAY (MG/CLT) OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK - BATTERY) Remove the MG/CLT relay from the engine room relay block and junction block. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition Relay block MG/CLT relay terminal 1 - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Component without relay installed (Engine Room Relay Block and Junction Block) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BATTERY) Disconnect the A/C amplifier connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F50-20 (MGC) - Body ground Engine switch off Below 1 V F50-20 (MGC) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. INSPECT A/C AMPLIFIER Reconnect the A/C amplifier connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F50-20 (MGC) - Body ground Engine switch on (IG) A/C switch: off 11 to 14 V F50-20 (MGC) - Body ground Engine switch on (IG) A/C switch: on Below 1 V TEXT IN ILLUSTRATION *1 Component with harness connected (A/C Amplifier) NG --> See step 14 OK: Go to next step
  6. INSPECT A/C COMPRESSOR Disconnect the A/C compressor connector. Disconnect the magnetic clutch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D7-3 (MG+) - d17-1 Always Below 1 ohms D7-3 (MG+) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (A/C Compressor) *2 Component without harness connected (Magnetic Clutch) NG --> See step 11 OK: Go to next step
  7. INSPECT MAGNETIC CLUTCH Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition d17-1 - Body ground 20°C (68°F) 3.8 to 4.2 ohms When connector terminal d17-1 is connected to a positive (+) battery terminal, check that the following occurs: 1) the magnetic clutch operating sound can be heard, and 2) the magnetic clutch hub and rotor lock. TEXT IN ILLUSTRATION *1 Component without harness connected (Magnetic Clutch) NG --> See step 13 OK: Go to next step
  8. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK - BATTERY) Remove the MG/CLT relay from the engine room relay block and junction block. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition Relay block MG/CLT relay terminal 5 - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Component without relay installed (Engine Room Relay Block and Junction Block NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  9. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK - A/C COMPRESSOR) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Relay block MG/CLT relay terminal 3 - D7-3 (MG+) Always Below 1 ohms D7-3 (MG+) - Body ground Always 10 kohms or higher Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C TEXT IN ILLUSTRATION *1 Component without relay installed (Engine Room Relay Block and Junction Block) *2 Front view of wire harness connector (to A/C Compressor) C --> See step 14 B --> See step 10 A --> REPAIR OR REPLACE HARNESS OR CONNECTOR
  10. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  11. REPLACE A/C COMPRESSOR. Refer to «REMOVAL»(ref-400783-S04470433622011051800000)
  12. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-400834-S34883510432011051800000)
  13. REPLACE MAGNETIC CLUTCH. Refer to «DISASSEMBLY»(ref-400783-S27699449452011051800000)
  14. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  1. INSPECT A/C AMPLIFIER Remove the A/C amplifier with its connectors still connected. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F50-1 (IG+) - F50-14 (GND) Engine switch off Below 1 V F50-1 (IG+) - F50-14 (GND) Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Component with harness connected (A/C Amplifier) NG --> See step 3 OK --> See step 2
  2. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)
  3. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BATTERY) Disconnect the A/C amplifier connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F50-1 (IG+) - Body ground Engine switch off Below 1 V F50-1 (IG+) - Body ground Engine switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-14 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
  5. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-400783-S39789643342011051800000)
  1. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BATTERY) Disconnect the A/C amplifier connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F50-21 (B) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BODY GROUND) Disconnect the A/C amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-14 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to A/C Amplifier) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3
  3. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400793-S35140746072011051800000)

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