Air Conditioning System (Diagnostic Codes & Circuit Tests): Diagnosis Lexus GS IV

INSPECTION PROCEDURE

Note. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. This DTC is stored when there is no refrigerant in the system, when DTC B1423, B14B8 and B1479 are output simultaneously, perform troubleshooting for DTC B14B8 first. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Scheme 239

1. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the air conditioner pressure sensor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition B7-3 (+) - Body ground Power switch on (IG) 4.75 to 5.25 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Air Conditioner 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 B7-1 (-) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Air Conditioner Pressure Sensor) NG --> See step 6 OK: Go to next step
3. CHECK AIR CONDITIONER PRESSURE SENSOR (SENSOR SIGNAL CIRCUIT) Reconnect the B7 air conditioner pressure sensor connector. Remove the air conditioning amplifier assembly with connectors still connected. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S08880567162014022400000) . Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition N80-9 (PRE) - Body ground Power switch on (IG) 0.63 to 4.73 V TEXT IN ILLUSTRATION *a Component with harness connected (Air Conditioning Amplifier Assembly) HINT: If the measured voltage is not within the normal range, there may be a malfunction in the air conditioning amplifier assembly, air conditioner pressure sensor or wire harness. It is also possible that amount of refrigerant may not be appropriate. NG --> See step 7 OK: Go to next step
4. CHECK AIR CONDITIONER PRESSURE SENSOR (SENSOR SIGNAL CIRCUIT) Turn the power switch on (Ready). Measure the voltage when the following conditions are satisfied. Item Condition Vehicle Doors Fully open Temperature Setting LO Blower Speed Hi A/C Switch On R/F Switch Recirculation Interior Temperature 25 to 35°C (77 to 95°F) NOTE: If refrigerant pressure on the high pressure side becomes extremely high during the inspection (if the voltage exceeds 4.8 V), the fail-safe function stops compressor operation. Therefore, measure the voltage before the fail-safe operation. It is necessary to measure the voltage for a certain amount 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 operation of 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 N80-9 (PRE) - Body ground Conditions in "Measurement Condition" chart above are met 0.63 to 4.73 V TEXT IN ILLUSTRATION *a Component with harness connected (Air Conditioning Amplifier Assembly) RESULT Result Proceed to OK (When troubleshooting according to the DTC) A OK (When troubleshooting according to Problem Symptoms Table) B NG C B --> See step 19 C --> See step 13 A --> See step 21
5. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - AIR CONDITIONER PRESSURE SENSOR) Disconnect the N80 air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B7-3 (+) - N80-13 (S5-3) Always Below 1 ohms N80-13 (S5-3) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 21
6. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - AIR CONDITIONER PRESSURE SENSOR) Disconnect the N80 air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B7-1 (-) - N80-32 (SG-2) Always Below 1 ohms N80-32 (SG-2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 21
7. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - AIR CONDITIONER PRESSURE SENSOR) Disconnect the N80 air conditioning amplifier assembly connector. Disconnect the B7 air conditioner pressure sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B7-2 (PR) - N80-9 (PRE) Always Below 1 ohms N80-9 (PRE) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. CHECK FOR AIR CONDITIONING SYSTEM LEAK Install the manifold gauge set. Recover the refrigerant from the air conditioning system using a refrigerant recovery unit. Refer to «ON-VEHICLE INSPECTION [03/2012 - ]»(ref-600577-S19636881282014022400000) . Evacuate the air conditioning system and check that vacuum can be maintained in it. OK Vacuum can be maintained in the air conditioning system. HINT: If vacuum cannot be maintained in the air conditioning system, refrigerant may be leaking from it. In this case, it is necessary to repair or replace the leaking part of the air conditioning system. NG --> See step 12 OK: Go to next step
9. CHARGE SYSTEM WITH REFRIGERANT Use a refrigerant recovery unit to recover refrigerant. Evacuate the air conditioning system. Add an appropriate amount of refrigerant. Refer to «REPLACEMENT [03/2012 - ]»(ref-600577-S31273849072014022400000) . 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, in order to confirm the problem, recover the refrigerant and properly evacuate the system. Add an appropriate amount of refrigerant, and check for DTCs. NEXT: Go to next step
10. RECHECK FOR DTC Turn the power switch on (Ready). Recheck for DTCs when the following conditions are satisfied. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600428-S10848817492014022400000) . Item Condition Vehicle Doors Fully open Temperature Setting LO Blower Speed Hi A/C Switch On R/F Switch Recirculation Interior Temperature 25 to 35°C (77 to 95°F) NOTE: If refrigerant pressure on the high pressure side becomes high, the DTC will be set. It is necessary to measure the voltage for a certain amount of time (approximately 10 minutes) because the DTC may be set after the air conditioning operates for a while. HINT: When the outside air temperature is low (below -1.5°C [29.3°F]), the compressor stops due to operation of 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. OK DTC B1423/23 is not output 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 the area where refrigerant leaks from as necessary. NG --> See step 11 OK --> END (AMOUNT OF REFRIGERANT WAS DEFECTIVE)
11. CHECK AIR CONDITIONER PRESSURE SENSOR Install the manifold gauge set. Reconnect the air conditioner pressure sensor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition N80-9 (PRE) - Body ground Power switch on (Ready) Blower switch: Lo A/C switch: on (magnet clutch on) 0.63 to 4.73 V TEXT IN ILLUSTRATION *a Component with harness connected (Air Conditioning Amplifier Assembly) NG --> See step 20 OK --> See step 21
12. REPAIR AIR CONDITIONING SYSTEM LEAK Identify the area where refrigerant leaks from. Refer to «REPLACEMENT [03/2012 - ]»(ref-600577-S31273849072014022400000) . Repair the identified area of the air conditioning system. Evacuate the air conditioning system. NEXT --> See step 22
13. CHECK COOLING FAN SYSTEM Check that the cooling fan(s) operates normally. Refer to «ON-VEHICLE INSPECTION [03/2012 - ]»(ref-600600-S15003854122014022400000) . NG --> See step 23 OK: Go to next step
14. CHARGE SYSTEM WITH REFRIGERANT Use a refrigerant recovery unit to recover refrigerant. Evacuate the air conditioning system. Add an appropriate amount of refrigerant. Refer to «REPLACEMENT [03/2012 - ]»(ref-600577-S31273849072014022400000) . 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, in order to confirm the problem, 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 Turn the power switch on (Ready). Recheck for DTCs when the following conditions are satisfied. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600428-S10848817492014022400000) . Item Condition Vehicle Doors Fully open Temperature Setting LO Blower Speed Hi A/C Switch On R/F Switch Recirculation Interior Temperature 25 to 35°C (77 to 95°F) NOTE: If refrigerant pressure on the high pressure side becomes high, the DTC will be set. It is necessary to measure the voltage for a certain amount of time (approximately 10 minutes) because the DTC may be set after the air conditioning operates for a while. HINT: When the outside air temperature is low (below -1.5°C [29.3°F]), the compressor stops due to operation of 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, in order to confirm the problem, recover the refrigerant and properly evacuate the system. Add an appropriate amount of refrigerant, and check for DTCs. If the DTC is not output after this work, it indicates that the cooler dryer in the condenser is not able to absorb moisture in the refrigerant cycle. It is necessary to replace the cooler dryer in order to complete the repair. OK DTC B1423/23 is not output NG --> See step 16 OK --> See step 24
16. REPLACE COOLER EXPANSION VALVE Replace the cooler expansion valve with a new one. Refer to «DISASSEMBLY [03/2012 - ]»(ref-600577-S35351757682014022400000) . HINT: Replace the cooler expansion valve with a new one because the cooler expansion valve is either stuck or clogged. NEXT: Go to next step
17. CHARGE SYSTEM WITH REFRIGERANT Use a refrigerant recovery unit to recover refrigerant. Evacuate the air conditioning system. Add an appropriate amount of refrigerant. Refer to «REPLACEMENT [03/2012 - ]»(ref-600577-S31273849072014022400000) . 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, in order to confirm the problem, recover the refrigerant and properly evacuate the system. Add an appropriate amount of refrigerant, and check for DTCs. NEXT: Go to next step
18. RECHECK FOR DTC Turn the power switch on (Ready). Recheck for DTCs when the following conditions are satisfied. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600428-S10848817492014022400000) . Item Condition Vehicle Doors Fully open Temperature Setting LO Blower Speed Hi A/C Switch On R/F Switch Recirculation Interior Temperature 25 to 35°C (77 to 95°F) NOTE: If refrigerant pressure on the high pressure side becomes high, the DTC will be set. It is necessary to measure the voltage for a certain amount of time (approximately 10 minutes) because the DTC may be set after the air conditioning operates for a while. HINT: When the outside air temperature is low (below -1.5°C [29.3°F]), the compressor stops due to operation of 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 normal one, the condenser or pipes may be clogged due to dirt, dust or other foreign matter. In this case, clean or replace the condenser or pipes. OK DTC B1423/23 is not output NG --> CLEAN OR REPLACE CONDENSER OR PIPE OK --> END (COOLER EXPANSION VALVE WAS DEFECTIVE)
19. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [03/2012 - ]»(ref-600428-S12585308122014022400000)
20. REPLACE AIR CONDITIONER PRESSURE SENSOR. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S09239899882014022400000)
21. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S08880567162014022400000)
22. CHARGE SYSTEM WITH REFRIGERANT. Refer to «REPLACEMENT [03/2012 - ]»(ref-600577-S31273849072014022400000)
23. GO TO COOLING FAN SYSTEM. Refer to «PROBLEM SYMPTOMS TABLE [03/2012 - ]»(ref-600600-S39238616552014022400000)
24. REPLACE COOLER CONDENSER ASSEMBLY. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S15923445282014022400000)

Note. Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked. When the auxiliary battery is disconnected, or a servo motor or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked. When the auxiliary battery is disconnected, or a servo motor or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked. When the auxiliary battery is disconnected, or a servo motor or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked. When the auxiliary battery is disconnected, or a servo motor or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked. When the auxiliary battery is disconnected, or a servo motor or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked. When the auxiliary battery is disconnected, or a servo motor or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked. When the auxiliary battery is disconnected, or a servo motor or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked. When the auxiliary battery is disconnected, or a servo motor or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked. When the auxiliary battery is disconnected, or a servo motor or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked. When the auxiliary battery is disconnected, or a servo motor or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION [03/2012 - ] . Inspect the fuses for circuits related to this system before performing the following inspection procedure. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the diagnosis procedure for the hybrid control system first if any DTCs from those systems are output simultaneously. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] .

Scheme 240

Scheme 241

1. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN communication system is functioning normally. Refer to «DIAGNOSIS SYSTEM [03/2012 - ]»(ref-600620-S06280412312014022400000) . RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B --> See step 9 A: Go to next step
2. CHECK HYBRID CONTROL SYSTEM Check if DTCs for the hybrid control system are output using the Techstream. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600583-S31071724722014022400000) . RESULT Result Proceed to Hybrid control system DTC is not output A Hybrid control system DTC is output B B --> See step 5 A: Go to next step
3. CHECK HIGH VOLTAGE FUSE WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. Refer to «REMOVAL [03/2012 - ]»(ref-600413-S04919884022014022400000) . NOTE: After removing the service plug grip, do not turn the power switch on (Ready), unless instructed by the appropriate service information because this may cause a malfunction. Remove the connector cover assembly from the inverter with converter assembly. Refer to «REMOVAL [03/2012 - ]»(ref-600413-S32974348392014022400000) . HINT: Make sure that no foreign objects have entered or contaminated the inverter with converter assembly. Disconnect the connector of the air conditioning harness from the inverter with converter assembly. HINT: Make sure that no foreign objects have entered or contaminated the connector of the air conditioning harness. Disconnect the connector of the No. 4 floor wire from the inverter with converter assembly. HINT: Make sure that no foreign objects have entered or contaminated the connector of the No. 4 floor wire. Check that bolts A and B are tightened securely. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Item (Tester Connection) Condition Specified Condition High voltage fuse (A - B) Always Below 1 ohms TEXT IN ILLUSTRATION *1 High Voltage Fuse NG --> See step 6 OK: Go to next step
4. CHECK AIR CONDITIONING HARNESS WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. Refer to «REMOVAL [03/2012 - ]»(ref-600413-S04919884022014022400000) . NOTE: After removing the service plug grip, do not turn the power switch on (Ready), unless instructed by the appropriate service information because this may cause a malfunction. Remove the air conditioning harness. Refer to «REMOVAL [03/2012 - ]»(ref-600587-S35960655032014022400000) . HINT: Make sure that no foreign objects have entered or contaminated the inverter with converter assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition V-1 (PE) - V3-1 (ACPE) Always Below 1 ohms V1-2 (PB) - V3-2 (ACPB) Always Below 1 ohms V-1 (PE) - Body ground Always 10 kohms or higher V1-2 (PB) - Body ground Always 10 kohms or higher V-1 (PE) - V1-2 (PB) Always 10 kohms or higher NG --> See step 8 OK --> See step 7
5. GO TO HYBRID CONTROL SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600583-S29316758402014022400000)
6. REPLACE HIGH VOLTAGE FUSE. Refer to «REMOVAL [03/2012 - ]»(ref-600413-S32974348392014022400000)
7. REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S14402485382014022400000)
8. REPLACE AIR CONDITIONING HARNESS. Refer to «REMOVAL [03/2012 - ]»(ref-600587-S35960655032014022400000)
9. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600588-S38298476802014022400000)

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the diagnosis procedure for the hybrid control system first if any DTCs from those systems are output simultaneously. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the diagnosis procedure for the hybrid control system first if any DTCs from those systems are output simultaneously. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] . If DTC B1498 is output at the same time, troubleshoot DTC B1498 first.

Scheme 242

1. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN communication system is functioning normally. Refer to «DIAGNOSIS SYSTEM [03/2012 - ]»(ref-600620-S06280412312014022400000) . RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B --> See step 8 A: Go to next step
2. CHECK HYBRID CONTROL SYSTEM Check if DTCs for the air conditioning system and the hybrid control system are output using the Techstream. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600583-S31071724722014022400000) . RESULT Result Proceed to DTC is not output or DTC P3108 is output A DTCs other than P3108 are output for hybrid control system B B --> See step 5 A: Go to next step
3. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - COMPRESSOR WITH MOTOR ASSEMBLY) WARNING: Do not disconnect the connector on the high voltage side. Disconnect the A36 power management control ECU connector. Disconnect the F16 compressor with motor assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A36-19 (STB) - F16-4 (STBI) Always Below 1 ohms A36-19 (STB) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK COMPRESSOR WITH MOTOR ASSEMBLY Reconnect the F16 compressor with motor assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A36-19 (STB) - Body ground Power switch on (IG) 11 to 14 V A36-19 (STB) - Body ground Power switch off Below 1 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Power Management Control ECU) NG --> See step 6 OK --> See step 7
5. GO TO HYBRID CONTROL SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600583-S29316758402014022400000)
6. REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S14402485382014022400000)
7. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)
8. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600588-S38298476802014022400000)

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the diagnosis procedure for the hybrid control system first if any DTCs from those systems are output simultaneously. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] .

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the diagnosis procedure for the hybrid control system first if any DTCs from those systems are output simultaneously. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] .

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the diagnosis procedure for the hybrid control system first if any DTCs from those systems are output simultaneously. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] .

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the diagnosis procedure for the hybrid control system first if any DTCs from those systems are output simultaneously. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. When the auxiliary battery is disconnected, or a servo motor or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION [03/2012 - ] . Inspect the fuses for circuits related to this system before performing the following inspection procedure. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the diagnosis procedure for the hybrid control system first if any DTCs from those systems are output simultaneously. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] .

Note. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Scheme 243

1. READ VALUE USING TECHSTREAM (SOLAR SENSOR [D SIDE]) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Air Conditioner / Data List. Refer to «DATA LIST / ACTIVE TEST [03/2012 - ]»(ref-600428-S08067317772014022400000) . 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 automatic light control sensor / Min.: 0, Max.: 255 Driver side automatic light control 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 B --> See step 6 C --> See step 7 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the automatic light control sensor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition O1-6 (CLTB) - O1-3 (CLTE) Power switch off Below 1 V O1-6 (CLTB) - O1-3 (CLTE) Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Automatic Light Control Sensor) NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY) Disconnect the N80 air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N80-7 (TSD) - O1-1 (TSL) Always Below 1 ohms N80-7 (TSD) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. INSPECT SOLAR SENSOR (AUTOMATIC LIGHT CONTROL SENSOR) Inspect the automatic light control sensor. Refer to on-vehicle inspection procedure. Refer to «ON-VEHICLE INSPECTION [03/2012 - ]»(ref-600577-S23127525382014022400000) . NG --> See step 8 OK --> See step 7
5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - AUTOMATIC LIGHT CONTROL SENSOR) Disconnect the N12 main body ECU (multiplex network body ECU) connector. Disconnect the O1 automatic light control sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N12-20 (CLTB) - O1-6 (CLTB) Always Blow 1 ohms N12-22 (CLTE) - O1-3 (CLTE) Always Blow 1 ohms N12-20 (CLTB) - Body ground Always 10 kohms or higher N12-22 (CLTE) - Body ground Always 10 kohms or higher N12-20 (CLTB) - N12-22 (CLTE) Always 10 kohms or higher 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 [03/2012 - ]»(ref-600428-S12585308122014022400000)
7. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S08880567162014022400000)
8. REPLACE AUTOMATIC LIGHT CONTROL SENSOR. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S00132522392014022400000)
9. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [03/2012 - ]»(ref-600595-S12145438012014022400000)

Note. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. This DTC is stored when there is malfunction in the sensor ground circuit, when DTC B14A8, B14A9 and B14AA are output simultaneously, perform troubleshooting for DTC B14AA first. The whole air conditioning thermistor assembly should be replaced if the glass temperature sensor is malfunctioning. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. This DTC is stored when there is malfunction in the sensor ground circuit, when DTC B14A8, B14A9 and B14AA are output simultaneously, perform troubleshooting for DTC B14AA first. The whole air conditioning thermistor assembly should be replaced if the glass temperature sensor is malfunctioning. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. The whole air conditioning thermistor assembly should be replaced if the glass temperature sensor is malfunctioning. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Inspect the fuses and relays for circuits related to this system before performing the following inspection procedure. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. This DTC is stored when there is no refrigerant in the system, when DTC B1423, B14B8 and B1479 are output simultaneously, perform troubleshooting for DTC B14B8 first. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to PRECAUTION [03/2012 - ] . Inspect the fuses for circuits related to this system before performing the following inspection procedure. Electrical insulation performance may decrease significantly if even a small amount of oil other than ND-OIL 11 is used (or enters) in the refrigerant cycle, causing the DTC P0AA6-611 to be output. If other oil is accidentally used and a DTC P0AA6-611 is output, collect the oil in the refrigerant cycle into the compressor and replace it with ND-OIL 11 to increase the ND-OIL 11 ratio amount. Replace the main components (evaporator, condenser, and compressor) if a large amount of oil other than ND-OIL 11 enters the system. Failing to do so may cause electrical insulation performance to remain low, causing the DTC P0AA6-611 to be output. HINT: If it can be confirmed that any compressor oil other than ND-OIL 11 has been used in the vehicle, replace the air conditioning cycle. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the diagnosis procedure for the hybrid control system first if any DTCs from those systems are output simultaneously. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ] .

HINT

When measuring insulation resistance using a megohmmeter, set the megohmmeter to 500 V.

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Scheme 244

1. PERFORM ACTIVE TEST USING TECHSTREAM (BLOWER MOTOR) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Air Conditioner / Active Test. Refer to «DATA LIST / ACTIVE TEST [03/2012 - ]»(ref-600428-S08067317772014022400000) . Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Blower Motor Blower with fan motor sub-assembly Min.: 0, Max.: 31 - RESULT Result Proceed to OK A NG (Blower with fan motor sub-assembly does not operate) B NG (Blower with fan motor sub-assembly operates but does not change speed) C B --> See step 2 C --> See step 6 A --> See step 7
2. CHECK HARNESS AND CONNECTOR (BLOWER WITH FAN MOTOR SUB-ASSEMBLY - BODY GROUND) Disconnect the blower with fan motor sub-assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A32-1 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Front view of harness connector (to Blower with Fan Motor Sub-assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (BLOWER WITH FAN MOTOR SUB-ASSEMBLY - BATTERY) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A32-3 (+B) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *a Front view of harness connector (to Blower with Fan Motor Sub-assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BLOWER WITH FAN MOTOR SUB-ASSEMBLY) Disconnect the N78 air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N78-3 (BLW) - A32-2 (SI) Always Below 1 ohms N78-3 (BLW) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK BLOWER WITH FAN MOTOR SUB-ASSEMBLY Reconnect the A32 blower with fan motor sub-assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition N78-3 (BLW) - Body ground Always 4.5 to 5.5 V TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Air Conditioning Amplifier Assembly) NG --> See step 8 OK: Go to next step
6. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY Remove the air conditioning amplifier assembly. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S08880567162014022400000) . Reconnect the air conditioning amplifier assembly connector. Turn the power switch on (IG). Turn the blower switch on Lo. Measure the waveform between terminal N78-3 (BLW) of the air conditioning amplifier assembly and body ground. OK Waveform is similar to that shown in the illustration. HINT: The waveform varies with the blower speed. Item Content Terminal No. (Symbol) N78-3 (BLW) - Body ground Tool setting 1 V/DIV., 500 μs/DIV. Vehicle condition Power switch on (IG) Blower switch: Lo TEXT IN ILLUSTRATION *a Component with harness connected (Air Conditioning Amplifier Assembly) NG --> See step 9 OK --> See step 8
7. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [03/2012 - ]»(ref-600428-S12585308122014022400000)
8. REPLACE BLOWER WITH FAN MOTOR SUB-ASSEMBLY. Refer to «DISASSEMBLY [03/2012 - ]»(ref-600577-S06850450042014022400000)
9. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S08880567162014022400000)

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 245

1. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN communication system is functioning normally. Refer to «DIAGNOSIS SYSTEM [03/2012 - ]»(ref-600620-S06280412312014022400000) . RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B --> See step 10 A: Go to next step
2. INSPECT NO. 1 INTEGRATION RELAY Remove the No. 1 integration relay. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 13 - Body ground When battery voltage is not applied between terminal 12 and 1 Below 1 V When battery voltage is applied between terminals 12 and 1 11 to 14 V NG --> REPLACE NO. 1 INTEGRATION RELAY OK: Go to next step
3. INSPECT HEATER ACCESSORY ASSEMBLY Remove the heater accessory assembly. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S16578010122014022400000) . Inspect the heater accessory assembly. Refer to «INSPECTION [03/2012 - ]»(ref-600577-S25819873052014022400000) . NG --> See step 8 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (HEATER ACCESSORY ASSEMBLY - NO. 1 INTEGRATION RELAY, BATTERY AND BODY GROUND) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 1E-12 - Body ground Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A46-2 - 1E-13 Always Below 1 ohms A46-1 - Body ground Always Below 1 ohms A46-2 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU) Disconnect the A35 power management control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1E-1 - A35-2 (WP) Always Below 1 ohms 1E-1 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. CHECK POWER MANAGEMENT CONTROL ECU TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) - - Reinstall the No. 1 integration relay. Reconnect the A46 heater accessory assembly connector. Reconnect the A35 power management control ECU connector. Turning the power switch is on (READY). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A35-2 (WP) - Body ground Air conditioning system operated Below 1 V A35-2 (WP) - Body ground Air conditioning system stopped 11 to 14 V NG --> See step 9 OK --> See step 7
7. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [03/2012 - ]»(ref-600428-S12585308122014022400000)
8. REPLACE HEATER ACCESSORY ASSEMBLY. Refer to «REMOVAL [03/2012 - ]»(ref-600577-S16578010122014022400000)
9. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)
10. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600588-S38298476802014022400000)

Note. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Inspect the fuses for circuits related to this system before performing the following inspection procedure. Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization. Refer to INITIALIZATION [03/2012 - ] . Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Note. Inspect the fuses and relays for circuits related to this system before performing the following inspection procedure. Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .

Scheme 246

1. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BATTERY) Disconnect the air conditioning amplifier assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition N78-5 (IG+) - Body ground Power switch off Below 1 V N78-5 (IG+) - Body ground Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Air Conditioning Amplifier Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N78-1 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Air Conditioning Amplifier Assembly) 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 [03/2012 - ]»(ref-600428-S12585308122014022400000)

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter. Refer to PRECAUTION [03/2012 - ] .