Air Conditioning System (Diagnostic Codes & Circuit Tests): Diagnosis Lexus LX J200 рестайлинг

INSPECTION PROCEDURE

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

Scheme 292

1. PERFORM ACTIVE TEST USING TECHSTREAM Select the Active Test, use the Techstream to generate a control command, and then check that the servo motor operates. Refer to «DATA LIST / ACTIVE TEST [01/2012 - ]»(ref-603931-S00063631292014031100000) . AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Air Mix Servo Targ Pulse(D) Air mix servo motor pulse (Front air conditioning rear air flow driver side) Min.: 8, Max.: 90 - Air Mix Servo Targ Pulse(P) Air mix servo motor pulse (Front air conditioning rear air flow passenger side) Min.: 8, Max.: 90 - Air Inlet Damper Targ Pulse Air inlet damper target pulse Min.: 9, Max.: 37 - Cool Air Bypass Pulse Cool air bypass pulse Min.: 6, Max.: 57 - Face A/O Servo Pulse(D) Air outlet servo motor pulse (Driver side) Min.: 6, Max.: 117 - Face A/O Servo Pulse(P) Air outlet servo motor pulse (Front passenger side) Min.: 6, Max.: 117 - A/M Servo Puls(F & D) Air mix servo motor pulse (Front air conditioning rear air flow driver side) Min.: 13, Max.: 41 - A/M Servo Puls(F & P) Air mix servo motor pulse (Front air conditioning rear air flow passenger side) Min.: 5, Max.: 33 - A/O Servo Pulse(F & D) Air outlet servo motor pulse (Front air conditioning rear air flow driver side) Min.: 9, Max.: 79 - A/O Servo Pulse(Rr D) Air outlet servo motor pulse (Rear driver side) Min.: 7, Max.: 83 - Rear Air Mix Servo Target Pulse Air mix damper servo motor pulse (Rear driver side) Min.: 9, Max.: 54 - Rear A/M Servo Pulse (P) Air mix damper servo motor pulse (Rear passenger side) Min.: 8, Max.: 53 - OK Arm of the servo motor selected in the Active Test moves smoothly According to the test, proceed to the next step. RESULT Result Proceed to Malfunction in servo motor connected to air conditioning harness assembly (segment A) A Malfunction in servo motor connected to air conditioning harness assembly (segment B) B Malfunction in servo motor connected to No. 2 air conditioning harness assembly C All of the servo motors are malfunctioning D B --> See step 7 C --> See step 15 D --> See step 21 A: Go to next step
2. SYSTEM CHECK (AIR CONDITIONING HARNESS ASSEMBLY (SEGMENT A)) According to the test, proceed to the next step. RESULT Result Proceed to Malfunction in front air mix damper servo motor (for driver side) A Malfunction in front air mix damper servo motor (for driver side rear air flow) B Malfunction in air outlet damper servo motor (for driver side mode) C Malfunction in air outlet damper servo motor (for rear seat mode) D Malfunction in all of the servo motors connected to the air conditioning harness assembly (segment A) E B --> See step 4 C --> See step 5 D --> See step 6 E --> See step 14 A: Go to next step
3. REPLACE FRONT AIR MIX DAMPER SERVO MOTOR (FOR DRIVER SIDE) Replace the front air mix damper servo motor (for driver side). Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 14 A --> END
4. REPLACE FRONT AIR MIX DAMPER SERVO MOTOR (FOR DRIVER SIDE REAR AIR FLOW) Replace the front air mix damper servo motor (for driver side rear air flow). Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 14 A --> END
5. REPLACE AIR OUTLET DAMPER SERVO MOTOR (FOR DRIVER SIDE MODE) Replace the air outlet damper servo motor (for driver side mode). Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 14 A --> END
6. REPLACE AIR OUTLET DAMPER SERVO MOTOR (FOR REAR SEAT MODE) Replace the air outlet damper servo motor (for rear seat mode). Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 14 A --> END
7. SYSTEM CHECK (AIR CONDITIONING HARNESS ASSEMBLY (SEGMENT B)) According to the test, proceed to the next step. RESULT Result Proceed to Malfunction in front air mix damper servo motor A Malfunction in air outlet damper servo motor B Malfunction in cool air bypass damper servo motor C Malfunction in REC/FRS damper servo motor D Malfunction in all of the servo motors connected to the air conditioning harness assembly (segment B) E B --> See step 11 C --> See step 12 D --> See step 13 E --> See step 14 A: Go to next step
8. SYSTEM CHECK (AIR MIX DAMPER SERVO MOTOR) According to the test, proceed to the next step. RESULT Result Proceed to Only the front air mix damper servo motor (for front passenger side) is malfunctioning A Only the front air mix damper servo motor (for front passenger side rear air flow) is malfunctioning B B --> See step 10 A: Go to next step
9. REPLACE FRONT AIR MIX DAMPER SERVO MOTOR (FOR FRONT PASSENGER SIDE) Replace the front air mix damper servo motor (for front passenger side). Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 14 A --> END
10. REPLACE FRONT AIR MIX DAMPER SERVO MOTOR (FOR FRONT PASSENGER SIDE REAR AIR FLOW) Replace the front air mix damper servo motor (for front passenger side rear air flow). Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 14 A --> END
11. REPLACE AIR OUTLET DAMPER SERVO MOTOR (FOR FRONT PASSENGER SIDE MODE) Replace the air outlet damper servo motor (for front passenger side mode). Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 14 A --> END
12. REPLACE COOL AIR BYPASS DAMPER SERVO MOTOR Replace the cool air bypass damper servo motor. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 14 A --> END
13. REPLACE REC/FRS DAMPER SERVO MOTOR Replace the REC/FRS damper servo motor. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42782376802014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 14 A --> END
14. REPLACE AIR CONDITIONING HARNESS ASSEMBLY Replace the air conditioning harness assembly. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the air conditioning harness assembly cannot be inspected while it is removed from the vehicle, replace the air conditioning harness assembly with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 21 A --> END
15. SYSTEM CHECK (NO. 2 AIR CONDITIONING HARNESS ASSEMBLY) According to the test, proceed to the next step. RESULT Result Proceed to Only the rear air mix damper servo motor LH is malfunctioning A Only the rear air mix damper servo motor RH is malfunctioning B Only the rear air outlet damper servo motor is malfunctioning C Malfunction in all of the servo motors connected to the No. 2 air conditioning harness assembly D B --> See step 17 C --> See step 18 D --> See step 19 A: Go to next step
16. REPLACE REAR AIR MIX DAMPER SERVO MOTOR LH Replace the rear air mix damper servo motor LH. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S02745817992014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 19 A --> END
17. REPLACE REAR AIR MIX DAMPER SERVO MOTOR RH Replace the rear air mix damper servo motor RH. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 19 A --> END
18. REPLACE REAR AIR OUTLET DAMPER SERVO MOTOR Replace the rear air outlet damper servo motor. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 19 A --> END
19. CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING HARNESS ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY) Disconnect the K19 No. 2 air conditioning harness assembly connector. Disconnect the E36 air conditioning amplifier assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition K19-2 (RBUG) - E36-12 (RBUG) Always Below 1 ohms K19-3 (RBUS) - E36-13 (RBUS) K19-4 (RBBU) - E36-14 (RBBU) E36-12 (RBUG) - Body ground Always 10 kohms or higher E36-13 (RBUS) - Body ground E36-14 (RBBU) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
20. REPLACE NO. 2 AIR CONDITIONING HARNESS ASSEMBLY Replace the No. 2 air conditioning harness assembly. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603919-S42724894142014031100000) . HINT: Since the No. 2 air conditioning harness assembly cannot be inspected while it is removed from the vehicle, replace the No. 2 air conditioning harness assembly with a new or a known good one and check that the condition returns to normal. Check for the DTC. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-603931-S33121550902014031100000) . RESULT Result Proceed to DTC B1497/97 is not output A DTC B1497/97 is output B B --> See step 21 A --> END
21. CHECK HARNESS AND CONNECTOR (POWER SOURCE) Disconnect the E36 air conditioning amplifier assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition E36-6 (+B1) - Body ground Always 11 to 14 V E36-7 (+B2) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 22
22. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL [01/2012 - ]»(ref-603919-S36487855842014031100000)

Scheme 293

The automatic light control sensor (solar sensor), which is installed on the upper side of the instrument panel, detects sunlight and controls the air conditioning in auto mode. The output current from the solar sensor varies according to the amount of sunlight. When the sunlight increases, the output current increases. As the sunlight decreases, the output current decreases. The air conditioning amplifier detects output current from the solar sensor.

HINT

If DTC B1244 is output at the same time, troubleshoot DTC B1244 first.

Scheme 294

HINT

Start the engine before inspection. Check the relay or battery if the smart access system with push-button start does not start.