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Contents Wiring diagrams Section: Automatic HVAC System All sections

Air Conditioning System (Diagnostic Codes & Circuit Tests) (Base): Other Toyota Prius Plug-in

Automatic HVAC System ~1784 words

PROCEDURE

  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Operate the temperature adjustment switch. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Mix Servo Targ Pulse (D) Air mix servo motor target pulse / Min.: 0, Max.: 255 MAX. COLD: 6 (pulse) MAX. HOT: 93 (pulse) - Air Mix Servo Actual Pulse (D) Air mix servo motor actual pulse / Min.: 0, Max.: 255 MAX. COLD: 6 (pulse) MAX. HOT: 93 (pulse) - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C B --> See step 5 C --> See step 6 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 Diagnostic Note Air Mix Servo Targ Pulse (D) Air mix servo motor pulse Min.: 0, Max.: 255 - OK Air temperature changes in accordance with each control range. NG --> See step 3 OK --> See step 6
  3. INSPECT AIR MIX CONTROL SERVO MOTOR Replace the air mix control servo motor. Refer to «DISASSEMBLY»(ref-551524-S25643220062013051500000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1441/41 is output A DTC B1441/41 is not output B B --> END (AIR MIX CONTROL SERVO MOTOR WAS DEFECTIVE) A: Go to next step
  4. INSPECT AIR CONDITIONING HARNESS Replace the air conditioning harness. Refer to «DISASSEMBLY»(ref-551524-S25643220062013051500000) . HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1441/41 is output A DTC B1441/41 is not output B B --> END (AIR CONDITIONING HARNESS WAS DEFECTIVE) A --> See step 6
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-551393-S01699272352013051500000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-551524-S30583713662013051500000)
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Operate the R/F (Recirculation/Fresh) switch. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Inlet Damper Targ Pulse Air inlet servo motor target pulse / Min.: 0, Max.: 255 RECIRCULATION: 19 (pulse) FRESH: 7 (pulse) - Air Inlet Damper Actual Pulse Air inlet servo motor actual pulse / Min.: 0, Max.: 255 RECIRCULATION: 19 (pulse) FRESH: 7 (pulse) - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C B --> See step 5 C --> See step 6 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 Diagnostic Note Air Inlet Damper Targ Pulse Air inlet damper target pulse Min.: 0, Max.: 255 - OK Recirculation damper position changes in accordance with each control range. NG --> See step 3 OK --> See step 6
  3. INSPECT AIR INLET CONTROL SERVO MOTOR Replace the air inlet control servo motor. Refer to «DISASSEMBLY»(ref-551524-S25761674472013051500000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1442/42 is output A DTC B1442/42 is not output B B --> END (AIR INLET CONTROL SERVO MOTOR WAS DEFECTIVE) A: Go to next step
  4. INSPECT AIR CONDITIONING HARNESS Replace the air conditioning harness. Refer to «DISASSEMBLY»(ref-551524-S25643220062013051500000) . HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1442/42 is output A DTC B1442/42 is not output B B --> END (AIR CONDITIONING HARNESS WAS DEFECTIVE) A --> See step 6
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-551393-S01699272352013051500000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-551524-S30583713662013051500000)
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Operate the MODE switch. Enter the following menus: Body Electrical / Air Conditioner / Data List. Check the value(s) by referring to the table below. AIR CONDITIONER Tester Display Measurement Item/Range Normal Condition Diagnostic Note Air Outlet Servo Pulse (D) Air outlet servo motor target pulse / Min.: 0, Max.: 255 FACE: 47 (pulse) B/L: 37 (pulse) FOOT: 17 (pulse) FOOT/DEF: 9 (pulse) DEF: 5 (pulse) - Air Outlet Servo Actu Pulse (D) Air outlet servo motor actual pulse / Min.: 0, Max.: 255 FACE: 47 (pulse) B/L: 37 (pulse) FOOT: 17 (pulse) FOOT/DEF: 9 (pulse) DEF: 5 (pulse) - OK The display is as specified in the Normal Condition column. Result Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C B --> See step 5 C --> See step 6 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 Rage Diagnostic Note Air Outlet Servo Pulse (D) Air outlet servo motor pulse Min.: 0, Max.: 255 - OK Air flow position changes in accordance with each control range. NG --> See step 3 OK --> See step 6
  3. INSPECT AIR OUTLET CONTROL SERVO MOTOR Replace the air outlet control servo motor. Refer to «DISASSEMBLY»(ref-551524-S25643220062013051500000) . HINT: Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1443/43 is output A DTC B1443/43 is not output B B --> END (AIR OUTLET CONTROL SERVO MOTOR WAS DEFECTIVE) A: Go to next step
  4. INSPECT AIR CONDITIONING HARNESS Replace the air conditioning harness. Refer to «DISASSEMBLY»(ref-551524-S25643220062013051500000) . HINT: Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal. Check for the DTC. Result Result Proceed to DTC B1443/43 is output A DTC B1443/43 is not output B B --> END (AIR CONDITIONING HARNESS WAS DEFECTIVE) A --> See step 6
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-551393-S01699272352013051500000)
  6. REPLACE A/C AMPLIFIER. Refer to «REMOVAL»(ref-551524-S30583713662013051500000)
  1. CHECK CAN COMMUNICATION SYSTEM Using 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 3 A --> See step 2
  2. REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to «REMOVAL»(ref-551524-S34727240532013051500000)
  3. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-551537-S08920306892013051500000)
  1. CHECK CAN COMMUNICATION SYSTEM Using 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 3 A --> See step 2
  2. REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to «REMOVAL»(ref-551524-S34727240532013051500000)
  3. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-551537-S08920306892013051500000)
  1. CHECK CAN COMMUNICATION SYSTEM Using 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 7 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 Diagnostic Note Electrical Fan Electrical fan OFF or ON - NG --> See step 4 OK: Go to next step
  3. CHECK REFRIGERANT PRESSURE Install the manifold gauge set. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-551524-S42592778612013051500000) . 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 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 , 21.3 to 35.6 psi) High pressure side 1.37 to 1.57 MPa (14 to 16 kgf/cm 2 , 199 to 228 psi) NG --> See step 5 OK --> See step 6
  4. GO TO COOLING FAN SYSTEM. Refer to «Cooling Fan Circuit»(ref-551549-S38320198362013051500000)
  5. CHARGE REFRIGERANT. Refer to «REPLACEMENT - Step 2»(ref-551524-S10388289692013051500000)
  6. REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to «REMOVAL»(ref-551524-S34727240532013051500000)
  7. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-551537-S08920306892013051500000)
  1. CHECK CAN COMMUNICATION SYSTEM Using 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 3 A --> See step 2
  2. REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to «REMOVAL»(ref-551524-S34727240532013051500000)
  3. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-551537-S08920306892013051500000)
  1. GO TO CAN COMMUNICATION SYSTEM HINT: Refer to CAN Communication System. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-551537-S08920306892013051500000) . NEXT --> END

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