Air Conditioning (Diagnostics Codes & Circuit Tests): Diagnosis Lexus HS I

INSPECTION PROCEDURE

HINT

If the cabin temperature is approximately -18.6°C (-1.48°F) or lower, DTC B1411/11 may be output even though the system is normal.

Scheme 123

1. READ VALUE USING TECHSTREAM 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. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition 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 F25-1 (+) - F25-2 (-) 10°C (50°F) 3.00 to 3.73 kohms F25-1 (+) - F25-2 (-) 15°C (59°F) 2.45 to 2.88 kohms F25-1 (+) - F25-2 (-) 20°C (68°F) 1.95 to 2.30 kohms F25-1 (+) - F25-2 (-) 25°C (77°F) 1.60 to 1.80 kohms F25-1 (+) - F25-2 (-) 30°C (86°F) 1.28 to 1.47 kohms F25-1 (+) - F25-2 (-) 35°C (95°F) 1.00 to 1.22 kohms F25-1 (+) - F25-2 (-) 40°C (104°F) 0.80 to 1.00 kohms F25-1 (+) - F25-2 (-) 45°C (113°F) 0.65 to 0.85 kohms F25-1 (+) - F25-2 (-) 50°C (122°F) 0.50 to 0.70 kohms F25-1 (+) - F25-2 (-) 55°C (131°F) 0.44 to 0.60 kohms F25-1 (+) - F25-2 (-) 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 the graph (Scheme 123) ). 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 ASSEMBLY) Disconnect the air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F47-29 (TR) - F25-1 (+) Always Below 1 ohms F47-34 (SG-1) - F25-2 (-) Always Below 1 ohms F47-29 (TR) - Body ground Always 10 kohms or higher F47-34 (SG-1) - Body ground Always 10 kohms or higher 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-398247-S14990846712011051600000)
5. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-398224-S23203152222011051600000)
6. REPLACE ROOM TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-398224-S22922910782011051600000)

HINT

If the ambient temperature is approximately -52.9°C (-63.22°F) or lower, DTC B1412/12 may be output even though the system is normal.

Scheme 124

1. READ VALUE USING TECHSTREAM 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. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition 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 A4-1 - A4-2 10°C (50°F) 3.00 to 3.73 kohms A4-1 - A4-2 15°C (59°F) 2.45 to 2.88 kohms A4-1 - A4-2 20°C (68°F) 1.95 to 2.30 kohms A4-1 - A4-2 25°C (77°F) 1.60 to 1.80 kohms A4-1 - A4-2 30°C (86°F) 1.28 to 1.47 kohms A4-1 - A4-2 35°C (95°F) 1.00 to 1.22 kohms A4-1 - A4-2 40°C (104°F) 0.80 to 1.00 kohms A4-1 - A4-2 45°C (113°F) 0.65 to 0.85 kohms A4-1 - A4-2 50°C (122°F) 0.50 to 0.70 kohms A4-1 - A4-2 55°C (131°F) 0.44 to 0.60 kohms A4-1 - A4-2 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 the graph (Scheme 124) ). 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 ASSEMBLY) Disconnect the air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F47-5 (TAM) - A4-1 Always Below 1 ohms F47-13 (SG-2) - A4-2 Always Below 1 ohms F47-5 (TAM) - Body ground Always 10 kohms or higher F47-13 (SG-2) - Body ground Always 10 kohms or higher 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-398247-S14990846712011051600000)
5. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-398224-S23203152222011051600000)
6. REPLACE AMBIENT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-398224-S22029378072011051600000)

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following procedure for the hybrid control system first if any DTCs from those systems are output simultaneously.

Scheme 125

Scheme 126

Scheme 127

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 5 A: Go to next step
2. CHECK DIAGNOSTIC TROUBLE CODE (HYBRID CONTROL SYSTEM) Check if DTCs for the hybrid control system are output using the Techstream. OK Hybrid control system DTCs are not output. NG --> See step 6 OK: Go to next step
3. INSPECT ELECTRIC VEHICLE FUSE WARNING: Be sure to wear insulated gloves. Turn the power switch off. Remove the service plug grip. WARNING: Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed. NOTE: Do not start the engine with the service plug grip removed because it may cause a malfunction. Remove the inverter terminal cover. NOTE: Be sure to prevent foreign objects or water from entering the inverter with converter assembly. 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 ELECTRIC VEHICLE fuse Always Below 1 ohms TEXT IN ILLUSTRATION *1 Inverter with Converter Assembly *2 Electric Vehicle Fuse NG --> See step 7 OK: Go to next step
4. INSPECT NO. 2 ENGINE WIRE WARNING: Be sure to wear insulated gloves. Disconnect the connector from the No. 2 engine wire. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D1-1 (PE) - D2-1 (ACPE) Always Below 1 ohms D1-2 (PB) - D2-2 (ACPB) Always Below 1 ohms D1-1 (PE) - Body ground Always 10 kohms or higher D1-2 (PB) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Compressor with Motor Assembly) *2 Front view of wire harness connector (to Inverter with Converter Assembly) NG --> See step 8 OK --> See step 9
5. GO TO CAN COMMUNICATION SYSTEM. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000)
6. GO TO HYBRID CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398094-S11405263312011051600000)
7. REPLACE ELECTRIC VEHICLE FUSE. Refer to «REMOVAL»(ref-398224-S31203264612011051600000)
8. REPLACE NO. 2 ENGINE WIRE. Refer to «DISASSEMBLY»(ref-398224-S13686817912011051600000)
9. REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to «REMOVAL»(ref-398224-S29778290172011051600000)

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following procedure for the hybrid control system first if any DTCs from those systems are output simultaneously.

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following procedure for the hybrid control system first if any DTCs from those systems are output simultaneously.

Scheme 128

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 5 A: Go to next step
2. CHECK DIAGNOSTIC TROUBLE CODE Check if DTCs for the air conditioning system and the hybrid control system are output using the Techstream. Result Result Proceed to Only DTC B1473 is output A DTCs B1473 and P3108 are output simultaneously (B1498 is not output) DTCs B1473 and B1498 are output simultaneously (P3108 is not output) B DTCs B1473, B1498 and P3108 are output simultaneously DTCs other than P3108 are output for hybrid control system C C --> See step 7 B --> See step 6 A: Go to next step
3. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - COMPRESSOR WITH MOTOR) WARNING: Do not disconnect the connector on the high-voltage side. Disconnect the hybrid vehicle control ECU connector. Disconnect the compressor with motor assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C28-33 (STB) - C26-4 (STBI) Always Below 1 ohms C28-33 (STB) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. INSPECT COMPRESSOR WITH MOTOR ASSEMBLY Reconnect the compressor with motor assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition C28-33 (STB) - Body ground Power switch on (IG) 11 to 14 V C28-33 (STB) - Body ground Power switch off Below 1 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Hybrid Vehicle Control ECU) NG --> See step 8 OK --> See step 9
5. GO TO CAN COMMUNICATION SYSTEM. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000)
6. GO TO DTC B1498/98. Refer to «DTC B1498/98: Communication Malfunction (A/C Inverter Local)»(ref-398245-S39838282172011051600000)
7. GO TO HYBRID CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398094-S11405263312011051600000)
8. REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to «REMOVAL»(ref-398224-S29778290172011051600000)
9. REPLACE HYBRID VEHICLE CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following procedure for the hybrid control system first if any DTCs from those systems are output simultaneously.

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following procedure for the hybrid control system first if any DTCs from those systems are output simultaneously.

Scheme 129

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 5 A: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test. Check the operation by referring to the table below. ENGINE Tester Display Test Part Control Range Control the Electric Cooling Fan Electrical fan OFF, ON OK Electrical fan operates smoothly. NG --> See step 6 OK: Go to next step
3. CHECK REFRIGERANT PRESSURE Install the manifold gauge set. Refer to «GENERAL INFORMATION»(ref-398089-S07584535382011051600000) . Read the manifold gauge pressure when the following conditions are established. Prepare the vehicle according to the chart below. Item Condition Vehicle Doors All fully open Compressor Speed 5200 rpm Temperature Setting MAX COLD Blower Speed HI A/C Switch ON R/F Switch RECIRCULATION (30 to 35°C (86 to 95°F)) Standard Pressure Low pressure side 0.15 to 0.25 MPa (1.5 to 2.5 kgf/cm 2 , 22 to 36 psi) High pressure side 1.37 to 1.57 MPa (14 to 16 kgf/cm 2 , 199 to 228 psi) NG --> See step 7 OK: Go to next step
4. READ OUTPUT DTC (DTC B1475/75) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398247-S42948602272011051600000) . Prepare the vehicle according to the table below. Item Condition Engine Speed Engine idling Blower Speed HI A/C Switch ON Temperature Setting MAX. COLD Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398247-S42948602272011051600000) . Result Result Proceed to DTC B1475/75 is not output (normal) A DTC B1475/75 is output B NOTE: If the engine keeps idling when ambient temperature is high, the compressor may automatically stop to protect the inverter circuit, and DTC B1475/75 may be stored. B --> See step 8 A --> SYSTEM IS OK
5. GO TO CAN COMMUNICATION SYSTEM. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000)
6. GO TO COOLING FAN SYSTEM. Refer to «Cooling Fan Circuit»(ref-398243-S41232609942011051600000)
7. CHARGE REFRIGERANT. Refer to «REPLACEMENT»(ref-398224-S37769964962011051600000)
8. REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to «REMOVAL»(ref-398224-S29778290172011051600000)

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following procedure for the hybrid control system first if any DTCs from those systems are output simultaneously.

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following procedure for the hybrid control system first if any DTCs from those systems are output simultaneously.

Note. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following procedure for the hybrid control system first if any DTCs from those systems are output simultaneously. Depending on the timing of the power supply to the 12 V power supply circuit and high-voltage circuit when the power switch is turned on (READY), an abnormal information signal may be output, causing this DTC to be stored. If the output DTC is a code that was memorized in the past, check the fuses and wire harnesses. If there is no malfunction, clear the DTC. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

This DTC is for the vehicle with w/ Plasmacluster (ion generator).

HINT

If DTC B1244 is output together with other DTCs, troubleshoot DTC B1244 first. Refer to DTC B1244: Light Sensor Circuit Malfunction .

Scheme 130

1. READ VALUE USING TECHSTREAM 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. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition 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 G1-6 (CLTB) - G1-3 (CLTE) Power switch off Below 1 V Power switch on (IG) 11 to 14 V NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (SOLAR SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY) Disconnect the solar sensor connector. Disconnect the air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F47-33 (TSD) - G1-1 (TSL) Always Below 1 ohms F47-33 (TSD) - Body ground Always 10 kohms or higher 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 power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition G1-1 (TSL) - G1-3 (CLTE) Sensor is exposed to electric light 0.8 to 4.3 V Sensor is covered with a piece of 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 (MULTIPLEX NETWORK BODY ECU) - SOLAR SENSOR) Disconnect the main body ECU (multiplex network body ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F9-20 (CLTB) - G1-6 (CLTB) Always Blow 1 ohms F9-22 (CLTE) - G1-3 (CLTE) Always Blow 1 ohms F9-20 (CLTB) - Body ground Always 10 kohms or higher F9-22 (CLTE) - Body ground 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»(ref-398247-S14990846712011051600000)
7. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-398224-S23203152222011051600000)
8. REPLACE SOLAR SENSOR. Refer to «REMOVAL»(ref-398224-S11655749912011051600000)
9. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(ref-398241-S22735242352011051600000)

HINT

If DTC B1244 is output together with other DTCs, troubleshoot DTC B1244 first. Refer to DTC B1244: Light Sensor Circuit Malfunction .

Scheme 131

1. READ VALUE USING TECHSTREAM 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. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition 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 G1-6 (CLTB) - G1-3 (CLTE) Power switch off Below 1 V Power switch on (IG) 11 to 14 V NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (SOLAR SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY) Disconnect the solar sensor connector. Disconnect the air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F47-32 (TSP) - G1-2 (TSR) Always Below 1 ohms F47-32 (TSP) - Body ground Always 10 kohms or higher 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 power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition G1-2 (TSR) - G1-3 (CLTE) Sensor is exposed to electric light 0.8 to 4.3 V 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 (MULTIPLEX NETWORK BODY ECU) - SOLAR SENSOR) Disconnect the main body ECU (multiplex network body ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F9-20 (CLTB) - G1-6 (CLTB) Always Below 1 ohms F9-22 (CLTE) - G1-3 (CLTE) Always Below 1 ohms F9-20 (CLTB) - Body ground Always 10 kohms or higher F9-22 (CLTE) - Body ground 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»(ref-398247-S14990846712011051600000)
7. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-398224-S23203152222011051600000)
8. REPLACE SOLAR SENSOR. Refer to «REMOVAL»(ref-398224-S11655749912011051600000)
9. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(ref-398241-S22735242352011051600000)

Note. Electrical insulation performance may decrease significantly if even a small amount of oil other than ND-OIL 11 is used in (or enters) the refrigerant cycle, causing the DTC to be output. If other oil is accidentally used and a DTC 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 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.

Scheme 132

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 COMPRESSOR WITH MOTOR ASSEMBLY WARNING: Because the compressor has a high-voltage circuit, wear insulated gloves and pull out the service plug grip to cut off the high-voltage circuit before inspection. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398247-S42948602272011051600000) . Turn the power switch on (IG). Prepare the vehicle according to the table below for 3 minutes. Item Condition Blower speed HI Temperature setting MAX COLD A/C ON Turn the power switch off. Remove the service plug grip. WARNING: Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed. NOTE: Do not start the engine with the service plug grip removed because it may cause a malfunction. Disconnect the compressor with motor assembly connector. Using a megohmmeter, measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D1-1 (PE) - Body ground Always 2 Mohms or higher D1-2 (PB) - Body ground Always 2 Mohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Compressor with Motor Assembly) NG --> See step 5 OK: Go to next step
3. INSPECT AIR CONDITIONING CYCLE WARNING: Because the compressor has a high-voltage circuit, wear insulated gloves and pull out the service plug grip to cut off the high-voltage circuit before inspection. Reconnect the connector to the compressor with motor assembly. Install the service plug grip. Turn the power switch on (IG). Set the A/C temperature to 25°C (77°F) and the blower speed to low and then operate the compressor for 10 minutes to circulate the refrigerant in the A/C system to collect as much compressor oil as possible. Turn the power switch off. Using a spot cooler or other tools, cool down the compressor with motor assembly for 30 minutes, or leave the vehicle overnight before inspection. NOTE: Do not operate the compressor before inspection. Remove the service plug grip. WARNING: Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed. NOTE: Do not start the engine with the service plug grip removed because it may cause a malfunction. Disconnect the compressor with motor assembly connector. Using a megohmmeter, measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition D1-1 (PE) - Body ground Always 3 Mohms or higher D1-2 (PB) - Body ground Always 3 Mohms or higher NOTE: If the results are out of the specified range, replace the compressor without operating. TEXT IN ILLUSTRATION *1 Component without harness connected (Compressor with Motor Assembly) NG --> REPLACE AIR CONDITIONING CYCLE OK --> See step 5
4. GO TO CAN COMMUNICATION SYSTEM. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000)
5. REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to «REMOVAL»(ref-398224-S29778290172011051600000)

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

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

Scheme 133

Scheme 134

1. PERFORM ACTIVE TEST USING TECHSTREAM 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. Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Range 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-398247-S14990846712011051600000)
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 F39-3 (GND) - Body ground Always Below 1 ohms 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 F39-1 (+B) - Body ground Always 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (BLOWER MOTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY) Disconnect the air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F47-23 (BLW) - F39-2 (SI) Always Below 1 ohms F47-23 (BLW) - Body ground Always 10 kohms or higher 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 F47-23 (BLW) - Body ground Always 4.5 to 5.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to air conditioning amplifier assembly) NG --> See step 8 OK: Go to next step
7. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Remove the air conditioning amplifier assembly. Reconnect the air conditioning amplifier assembly connector. Turn the power switch on (IG). Set the blower speed to low. Measure the waveform between terminal F47-23 (BLW) of the air conditioning amplifier assembly and body ground. Item Content Tool setting 1 V/DIV., 500 μs/DIV. Vehicle condition Power switch on (IG) Blower set to low OK Waveform is as shown in the illustration (Scheme 134). HINT: The waveform varies with the blower speed. TEXT IN ILLUSTRATION *1 Component with harness connected (Air conditioning amplifier assembly) NG --> See step 9 OK --> See step 8
8. REPLACE BLOWER MOTOR. Refer to «REMOVAL»(ref-398224-S22867237812011051600000)
9. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-398224-S23203152222011051600000)

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

Scheme 135

Scheme 136

Scheme 137

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 11 A: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM 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. Check the operation by referring to the table below. AIR CONDITIONER Tester Display Test Part Control Range Water Pump Water pump relay OFF, ON Result Result Proceed to NG A OK B OK (When troubleshooting according to Problem Symptoms Table) C C --> See step 12 B --> See step 10 A: Go to next step
3. INSPECT RELAY (A/C W/P) Remove the A/C W/P relay from the No. 1 engine room relay 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 between terminals 1 and 2) NG --> REPLACE RELAY (A/C W/P) OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (A/C FUSE - A/C W/P RELAY) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - Body ground Power switch on (IG) 11 to 14 V 5 - Body ground Power switch on (IG) 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU CIRCUIT) Reinstall the A/C W/P relay to the HV SUB relay block and junction block 2. Disconnect the connector from the power management control ECU. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A58-11 (WP) - Body ground Power switch off Below 1 V Power switch on (IG) 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (A/C W/P RELAY CIRCUIT) Remove the A/C W/P relay from the No. 1 engine room relay block. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition Relay block A/C W/P relay terminal 3 - Body ground Power switch on (IG) 11 to 14 V Power switch off Below 1 V TEXT IN ILLUSTRATION *1 Component without relay installed (No. 1 Engine Room Relay Block) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. INSPECT HEATER WATER PUMP ASSEMBLY Disconnect the connector from the heater water pump assembly. Connect the positive (+) lead from a battery to terminal 2 and the negative (-) lead to terminal 1. OK Heater water pump assembly operates smoothly. NOTE: Complete this inspection within 10 seconds if there is no water in the heater water pump assembly. TEXT IN ILLUSTRATION *1 Component without harness connected (Heater Water Pump Assembly) NG --> See step 13 OK: Go to next step
8. CHECK HARNESS AND CONNECTOR (HEATER WATER PUMP ASSEMBLY - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A32-1 - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
9. CHECK HARNESS AND CONNECTOR (HEATER WATER PUMP ASSEMBLY - ENGINE R/B AND J/B) Remove the A/C W/P relay from the No. 1 engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A32-1 - Relay block A/C W/P relay terminal 3 Always Below 1 ohms A32-1 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
10. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Replace the air conditioning amplifier assembly with a known good one and check if the same problem occurs again. Refer to «REMOVAL»(ref-398224-S23203152222011051600000) . OK Same problem does not occur. NG --> See step 14 OK --> END (AIR CONDITIONING AMPLIFIER ASSEMBLY WAS DEFECTIVE)
11. GO TO CAN COMMUNICATION SYSTEM. Refer to «DIAGNOSIS SYSTEM»(ref-398235-S15853483682011051600000)
12. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398247-S14990846712011051600000)
13. REPLACE HEATER WATER PUMP ASSEMBLY. Refer to «REMOVAL»(ref-398224-S07158606092011051600000)
14. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)

HINT

Before starting the following inspection, check the fuses and relays related to this circuit.

Scheme 138

1. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - REAR COOLER SWITCH) Disconnect the F47, F48 and F64 connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F47-15 (SWR1) - F64-1 (RA/C) Always Below 1 ohms F64-1 (RA/C) - Body ground Always 10 kohms or higher F48-19 (SWE) - F64-2 (E) Always Below 1 ohms F64-2 (E) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. INSPECT REAR COOLER SWITCH (REAR CONSOLE BOX) Remove the rear cooler switch (rear console box). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F64-1 (RA/C) - F64-2 (E) Rear blower volume off (Rear cooler switch not pressed) 10 kohms or higher Rear blower volume on (Rear cooler switch pressed) Below 1 ohms NG --> See step 12 OK: Go to next step
3. INSPECT AIR CONDITIONING AMPLIFIER Reconnect the F47 and F48 connectors. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F47-15 (SWR1) - F48-19 (SWE) Always 4.5 to 7.0 V NG --> See step 13 OK: Go to next step
4. INSPECT COOLER BLOWER ASSEMBLY Reconnect the cooler blower assembly connector. Check the cooler blower assembly operation. OK Tester Connection Condition Specified Condition 1 - 2 Connect the auxiliary battery negative (-) - 1 Connect the auxiliary battery positive (+) - 2 Cooler blower motor operates smoothly NG --> REPLACE COOLER BLOWER ASSEMBLY OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (COOLER BLOWER ASSEMBLY CIRCUIT) Disconnect the F62 rear motor control connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F62-3 (GND) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F62-2 (+B) - Body ground Power switch on (IG) 11 to 14 V NG --> See step 12 OK: Go to next step
6. INSPECT COOLER BLOWER ASSEMBLY Disconnect the F62 connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition F48-22 (BLWH) - F62-4 (SI) Always 11 to 14 V NG --> REPLACE COOLER BLOWER ASSEMBLY OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (REAR BLOWER MOTOR CONTROL - A/C AMPLIFIER ASSEMBLY) Disconnect the F48 connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition F48-22 (BLWH) - F62-4 (SI) Always Below 1 ohms F48-22 (BLWH) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. INSPECT BLOWER MOTOR CONTROL Reconnect the F62 connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F48-22 (BLWH) - F47-14 (GND) Always 4.5 to 7.0 V NG --> See step 10 OK: Go to next step
9. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Remove the air conditioning amplifier assembly with its connectors still connected. Check the waveform. OK Waveform is as shown in the illustration. HINT: The waveform varies with the blower level. Item Content Tester Connection F48-22 (BLWH) - F47-14 (GND) Tool Setting 1 V/DIV., 500 μsec./DIV. Condition Power switch on (IG) Blower switch LO TEXT IN ILLUSTRATION *1 Component with harness connected (Air conditioning Amplifier Assembly) NG --> See step 13 OK --> See step 11
10. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER CIRCUIT) Disconnect the F47 and F48 connectors. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F48-22 (BLWH) - F47-14 (GND) Power switch on (IG) Blower switch OFF 4.5 to 5.5 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 11
11. REPLACE BLOWER MOTOR CONTROL. Refer to «REMOVAL»(ref-398224-S24277786452011051600000)
12. REPLACE REAR COOLER SWITCH (REAR CONSOLE BOX). Refer to «REMOVAL»(ref-398252-S37233108892011051600000)
13. REPLACE AIR CONDITIONING AMPLIFIER. Refer to «REMOVAL»(ref-398224-S23203152222011051600000)

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

HINT

Turn the power switch on (IG) before inspection. Check the IG1 NO. 1 relay or auxiliary battery if the power source does not change to on (IG).

Scheme 139

1. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Remove the air conditioning amplifier assembly with the connectors still connected. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F47-1 (IG+) - F47-14 (GND) Power switch off Below 1 V Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *1 Component with harness connected (Air conditioning amplifier assembly) 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-398247-S14990846712011051600000)
3. 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 Condition Specified Condition F47-1 (IG+) - Body ground Power switch off Below 1 V Power switch on (IG) 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. 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 F47-14 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
5. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-398224-S23203152222011051600000)

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