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

PROCEDURE

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Select the items below in the Data List, and read the displays on the Techstream. DATA LIST / AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Mix Servo Targ Pulse(P) (Air Mix Pulse-P) Passenger side air mix servo motor target pulse / Min.: 0, Max.: 255 Customized value will be displayed - OK The display is as specified in the normal condition. RESULT Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C C --> REPLACE AIR CONDITIONING AMPLIFIER B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387145-S36094178262011022400000) A: Go to next step
2. REPLACE AIR MIX CONTROL SERVO MOTOR HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal. OK Same problem does not occur. NG --> REPLACE AIR CONDITIONING HARNESS OK --> END

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Select the items below in the Data List, and read the displays on the Techstream. DATA LIST / AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Inlet Damper Targ Pulse (A/I Damp Targ Pls) Air inlet damper target pulse / Min.: 0, Max.: 255 Customized value will be displayed - OK The display is as specified in the normal condition. RESULT Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C C --> REPLACE AIR CONDITIONING AMPLIFIER B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387145-S36094178262011022400000) A: Go to next step
2. REPLACE AIR INLET CONTROL SERVO MOTOR HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal. OK Same problem does not occur. NG --> REPLACE AIR CONDITIONING HARNESS OK --> END

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Select the items below in the Data List, and read the displays on the Techstream. DATA LIST / AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Outlet Servo Pulse (D) (Air Out Pulse-D) Driver side air outlet servo motor target pulse / Min.: 0, Max.: 255 Customized value will be displayed - OK The display is as specified in the normal condition. RESULT Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C C --> REPLACE AIR CONDITIONING AMPLIFIER B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387145-S36094178262011022400000) A: Go to next step
2. REPLACE AIR OUTLET CONTROL SERVO MOTOR HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal. OK Same problem does not occur. NG --> REPLACE AIR CONDITIONING HARNESS OK --> END

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Select the items below in the Data List, and read the displays on the Techstream. DATA LIST / AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Cool Air Bypass Pulse (A/B Damp Pls) Passenger side cool air bypass pulse / Min.: 0, Max.: 255 Customized value will be displayed - OK The display is as specified in the normal condition. RESULT Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C C --> REPAIR AIR CONDITIONING AMPLIFIER B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387145-S36094178262011022400000) A: Go to next step
2. REPLACE COOL AIR BYPASS SERVO MOTOR HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal. OK Same problem does not occur. NG --> REPAIR AIR CONDITIONING HARNESS OK --> END

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Select the items below in the Data List, and read the displays on the Techstream. DATA LIST / AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Mix Servo Targ Pulse(D) (Air Mix Pulse-D) Driver side air mix servo motor target pulse / Min.: 0, Max.: 255 Customized value will be displayed - OK The display is as specified in the normal condition. RESULT Result Proceed to NG A OK (Checking from the PROBLEM SYMPTOMS TABLE) B OK (Checking from the DTC) C C --> REPLACE AIR CONDITIONING AMPLIFIER B --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387145-S36094178262011022400000) A: Go to next step
2. REPLACE AIR MIX CONTROL SERVO MOTOR HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal. OK Same problem does not occur. NG --> REPLACE AIR CONDITIONING HARNESS OK --> END

1. REPLACE COMPRESSOR ASSEMBLY NEXT --> END

1. REPLACE COMPRESSOR ASSEMBLY NEXT --> END

1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Select the item below in the Active Test and then check that the fan operates. ACTIVE TEST / AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Electrical Fan (Electrical Fan) Electrical fan OFF, ON - OK Electrical fan operates smoothly. NG --> See step 4 OK: Go to next step
2. CHECK REFRIGERANT VOLUME Check the sight glass on the liquid tube. Prepare the vehicle according to the table below. Item Condition Vehicle doors All fully open Temperature setting MAX. COLD Blower speed HI A/C ON Power switch ON (IG) Check the sight glass according to the following table. Item Symptom Amount of refrigerant Corrective Action 1 Bubbles exist Insufficient* Check for gas leakage and repair if necessary. Add refrigerant until bubbles disappear. 2 No bubbles exist Empty, insufficient or excessive Refer to 3 and 4 3 No temperature difference between compressor inlet and outlet Empty or nearly empty Check for gas leakage with gas leak detector and repair if necessary. Evacuate the A/C system and recharge the proper amount of refrigerant. 4 Considerable temperature difference between compressor inlet and outlet Proper or excessive Refer to 5 and 6 5 Immediately after air conditioning is turned off, refrigerant clears Excessive Discharge refrigerant. Evacuate the A/C system and recharge the proper amount of refrigerant. 6 Immediately after air conditioning is turned off, refrigerant foams and then becomes clear Proper - HINT: *: Bubbles in the sight glass with the vehicle's interior above 35°C (95°F) can be considered normal if cooling is sufficient. NOTE: If the amount of refrigerant is low, the compressor may stop in approximately 1 minute. If the compressor stops because of any trouble in the compressor assembly, inspection may not be possible. For such cases, the compressor assembly should be replaced. OK Immediately after air conditioning is turned off, refrigerant foams and then becomes clear. NG --> CHARGE REFRIGERANT OK: Go to next step
3. READ OUTPUT DTC (DTC B1475/75) Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-387145-S20183754872011022400000) . Engine idling. Blower switch is HI. A/C switch is ON. Read the DTC. Refer to «DTC CHECK / CLEAR»(ref-387145-S20183754872011022400000) . 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 --> REPLACE COMPRESSOR ASSEMBLY A --> USE SIMULATION METHOD TO CHECK
4. GO TO COOLING FAN SYSTEM. Refer to «ON-VEHICLE INSPECTION»(ref-387102-S20332607972011022400000)

1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Select the item below in the Active Test and then check that the fan operates. ACTIVE TEST / AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Electrical Fan (Electrical Fan) Electrical fan OFF, ON - OK Electrical fan operates smoothly. NG --> See step 3 OK: Go to next step
2. CHECK REFRIGERANT VOLUME Check the sight glass on the liquid tube. Prepare the vehicle according to the table below. Item Condition Vehicle doors All fully open Temperature setting MAX. COLD Blower speed HI A/C ON Power switch ON (IG) Check the sight glass according to the following table. Item Symptom Amount of refrigerant Corrective Actions 1 Bubbles exist Insufficient* Check for gas leakage and repair if necessary. Add refrigerant until bubbles disappear 2 No bubbles exist Empty, insufficient or excessive Refer to 3 and 4 3 No temperature difference between compressor inlet and outlet Empty or nearly empty Check for gas leakage with gas leak detector and repair if necessary. Evacuate the A/C system and recharge the proper amount of refrigerant. 4 Considerable temperature difference between compressor inlet and outlet Proper or excessive Refer to 5 and 6 5 Immediately after air conditioning is turned off, refrigerant clears Excessive Discharge refrigerant. Evacuate the A/C system and recharge the proper amount of refrigerant. 6 Immediately after air conditioning is turned off, refrigerant foams and then becomes clear Proper - HINT: *: Bubbles in the sight glass with the vehicle's interior above 35°C (95°F) can be considered normal if cooling is sufficient. NOTE: If the amount of refrigerant is low, the compressor may stop in approximately 1 minute. If the compressor stops because of any trouble in the compressor assembly, inspection may not be possible. For such cases, the compressor assembly should be replaced. OK Immediately after air conditioning is turned off, refrigerant foams and then becomes clear. NG --> CHARGE REFRIGERANT OK --> REPLACE COMPRESSOR ASSEMBLY
3. GO TO COOLING FAN SYSTEM. Refer to «ON-VEHICLE INSPECTION»(ref-387093-S08936037932011022400000)

1. REPLACE COMPRESSOR ASSEMBLY NEXT --> END

1. CHECK FOR DTC Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-387145-S20183754872011022400000) . Check for the DTC. Refer to «DTC CHECK / CLEAR»(ref-387145-S20183754872011022400000) . Result Result Proceed to DTC B1499/99 is output A. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-386979-S33914524662011022400000) DTC B1499/99 is not output B B --> USE SIMULATION METHOD TO CHECK A --> See next step
2. GO TO MULTIPLEX COMMUNICATION SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-386979-S33914524662011022400000)