NOTE: Use a digital multimeter to make all electrical measurements.
PINPOINT TEST C: POWER SEAT DOES NOT WORK
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STATES |
DETAILS/RESULTS/ACTIONS |
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C1: CHECK VOLTAGE SUPPLIED TO POWER SEAT CONTROL SWITCH |
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1 Enter the OFF position. |
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2 Disconnect Inoperative power seat control switch - C715. |
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3 Drive the ON position. |
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4 Measure the voltage between C715 pin 2 of the power seat control switch, circuit 29-AH6 (orange/yellow), on the wiring harness side, and "weight". |
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• Is the voltage over 10 V? |
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→ Yes |
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Go to C2 |
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→ No |
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REPAIR Circuit 29-AH6 (orange/yellow). CHECK the system is working properly. |
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C2: INSPECT POWER SEAT CONTROL SWITCH GROUND CIRCUIT FOR OPEN |
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1 Enter the OFF position. |
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2 Measure the resistance between C715 pin 3 of the power seat control switch, circuit 31-AH6 (black), on the wiring harness side, and "weight". |
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• Is the resistance less than 5 ohms? |
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→ Yes |
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Go to C3 |
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→ No |
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REPAIR Circuit 31-AH6 (black). CHECK the system is working properly. |
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C3: CHECK LOWER CIRCUIT VOLTAGE SUPPLIED TO ELECTRIC SEAT HEIGHT ADJUST MOTOR |
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1 Connect Inoperative Power Seat Control Switch - C715. |
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2 Disconnect Inoperative Power Seat Height Motor - C761. |
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3 Drive the ON position. |
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4 Press the power seat control switch to the DOWN position. |
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5 Measure the voltage between C761 pin 1 of the power seat height adjustment motor, circuit 32-AH10 (white/black), on the wiring harness side, and "weight". |
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• Is the voltage over 10 V? |
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→ Yes |
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Go to C4 |
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→ No |
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REPAIR Circuit 32-AH10 (white/black). CHECK the system is working properly. |
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C4: CHECK LIFT CIRCUIT VOLTAGE SUPPLIED TO ELECTRIC SEAT HEIGHT ADJUST MOTOR |
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1 Push the power seat control switch to the UP position. |
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2 Measure the voltage between C761 pin 2 of the power seat height adjustment motor, circuit 33-AH10 (yellow/black), on the wiring harness side, and "weight". |
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• Is the voltage over 10 V? |
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→ Yes |
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INSTALL a new power seat height motor. CHECK the system for correct operation. |
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→ No |
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REPAIR Circuit 33-AH10 (yellow/black). CHECK the system is working properly. |
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PINPOINT TEST D: SEAT HEATING DOES NOT WORK
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STATES |
DETAILS/RESULTS/ACTIONS |
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D1: CHECK THE VOLTAGE SUPPLIED TO THE HEATED SEAT SWITCH |
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1 Drive the ON position. |
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2 Press the seat heating switch. |
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• Is the seat heating switch LED on? |
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→ Yes |
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Go to D2 |
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→ No |
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Go to D6 |
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D2: CHECK VOLTAGE SUPPLIED TO HEATED SEAT OUT OF WORK MATS |
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1 Enter the OFF position. |
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2 Disconnect Non-functional heated seat - C30 or C31. |
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3 Drive the ON position. |
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4 Press the seat heating switch. |
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5 Measure the voltage between: - pin 5 C30 driver's seat cushion with electric and heated (LHD), electrical circuit 15S-HC8 (green/red), on the wiring harness side, and "weight". – pin 5 C31 passenger seat cushion with electric and heated (LHD), electrical circuit 15S-HC11 (green/white), on the wiring harness side, and "weight". - pin 5 C31 driver's seat cushion with electric and heated (RHD), electrical circuit 15S-HC11 (green/white), on the wiring harness side, and "weight". - pin 5 C30 passenger seat cushion with electric and heated (RHD), electrical circuit 15S-HC8 (green/red), on the wiring harness side, and "weight". |
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• Is the voltage over 10 V? |
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→ Yes |
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Go to D3 |
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→ No |
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REPAIR circuit 15S-HC8 (green/red) or electrical circuit 15S-HC11 (green/white). CHECK the system is working properly. |
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D3: INSPECT SEAT CUSHION HEATER MAT GROUND CIRCUIT FOR OPEN |
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1 Enter the OFF position. |
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2 Measure the resistance between: – pin 12 C30 for the backrest of the driver's seat with electric drive and non-working heating (LHD), electrical circuit 31-HC8 (black), on the wiring harness side, and "weight". – pin 12 C31 of the backrest of the passenger seat with electric drive and non-working heating (LHD), electrical circuit 31-HC11 (black), on the wiring harness side, and "weight". – pin 12 C31 of the backrest of the driver's seat with electric drive and non-working heating (RHD), electrical circuit 31-HC11 (black), on the wiring harness side, and "weight". – pin 12 C30 of the passenger seat backrest with electric drive and non-working heating (RHD), electrical circuit 31-HC8 (black), on the wiring harness side, and "weight". |
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• Is the resistance less than 5 ohms? |
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→ Yes |
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Go to D4 |
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→ No |
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REPAIR Circuit 31-HC8 (black) or electrical circuit 31-HC11 (black). CHECK the system is working properly. |
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D4: INSPECT SEAT CUSHION HEATER MAT CIRCUIT FOR OPEN |
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1 Measure the resistance of the heating elements between: – pin 5 C30 driver's seat cushion with electric adjustment and non-working heating (LHD), electrical circuit 15S-HC8 (green/red), on the side of the element, and pin 6 C30 seat cushion, heated, electrical circuit 15S-HC7 (green/blue), from the side of the element. – pin 5 C31, power passenger seat cushion with non-functional heating (LHD), electrical circuit 15S-HC11 (green/white), on the side of the element, and pin 6 C31 of the non-functional heated seat cushion, electrical circuit 15S-HC10 (green/orange), from the side of the element. – pin 5 C31 driver's seat cushion with electric adjustment and non-working heating (RHD), electrical circuit 15S-HC11 (green/white), on the side of the element, and pin 6 C31 of the non-functional heated seat cushion, electrical circuit 15S-HC10 (green/orange), from the side of the element. – pin 5 30 of the passenger seat cushion with electric drive and non-working heating (RHD), electrical circuit 15S-HC8 (green/red), on the side of the element, and pin 6 C30 of the non-functioning heated seat cushion, electrical circuit 15S-HC7 green/blue), from the side of the element. |
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• Resistance is 9 ohms (resistance of one heater mat)? |
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→ Yes |
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Go to D5 |
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→ No |
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INSTALL a new heater mat. CHECK the system is working properly. |
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D5: INSPECT SEAT-BACK HEATER MAT CIRCUIT FOR OPEN |
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1 Measure the resistance of the heating elements between: - pin 11 C30 for the driver's seat backrest with electric drive and non-working heating (LHD), electrical circuit 15S-HC7 (green/blue), on the side of the element, and pin 12 C30 of the backrest of the inoperative heated seat, electrical circuit 31-HC8 (black), from the side of the element. – pin 11 C31 of the backrest of the passenger seat with electric drive and non-working heating (LHD), electrical circuit 15S-HC10 (green/orange), on the side of the element, and pin 12 C31 of the backrest of the inoperative heated seat, electrical circuit 31-HC11 (black), from the side of the element. – pin 11 C31 of the backrest of the driver's seat with electric drive and non-working heating (RHD), electrical circuit 15S-HC10 (green/orange), on the side of the element, and pin 12 C31 of the backrest of the inoperative heated seat, electrical circuit 31-HC11 (black), from the side of the element. – pin 11 C30 of the backrest of the passenger seat with electric drive and non-working heating (RHD), electrical circuit 15S-HC7 (green/blue), on the side of the element, and pin 12 C30 of the backrest of the inoperative heated seat, electrical circuit 31-HC8 (black), from the side of the element. |
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• Resistance is 9 ohms (resistance of one heater mat)? |
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→ Yes |
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REPAIR circuit 15S-HC7 (green/blue) or electrical circuit 15S-HC10 (green/orange). CHECK the system is working properly. |
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→ No |
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INSTALL a new heater mat. CHECK the system is working properly. |
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D6: CHECK IGNITION VOLTAGE AT HEATED SEAT SWITCH |
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1 Enter the OFF position. |
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2 Disconnect Inoperative seat heating switch - C694 or C695. |
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3 Drive the ON position. |
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4 Measure the voltage between: - Pin 2 C694 of the power driver's seat heating switch inoperative (LHD), electrical circuit 15-HC6 (green/yellow), on the wiring harness side, and "weight". – pin 2 C695 of the inoperative power passenger seat heating switch (LHD), electrical circuit 15-HC9 (green/black), on the wiring harness side, and "weight". - Pin 2 C695 of the inoperative power driver's seat heating switch (RHD), electric circuit 15-HC9 (green/black), on the wiring harness side, and "weight". – pin 2 C694 of the inoperative power passenger seat heating switch (RHD), electric circuit 15- HC6 (green/yellow), on the wiring harness side, and "weight". |
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• Is the voltage over 10 V? |
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→ Yes |
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Go to D7 |
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→ No |
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REPAIR Circuit 15-HC6 (green/yellow) or electrical circuit 15-HC9 (green/black). CHECK the system is working properly. |
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D7: INSPECT HEATED SEAT SWITCH GROUND CIRCUIT FOR OPEN |
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1 Enter the OFF position. |
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2 Measure the resistance between: - Pin 4 C694 of the power driver's seat heating switch inoperative (LHD), electrical circuit 31-LH29 (black), on the wiring harness side, and "weight". – pin 4 C695 of the inoperative power passenger seat heating switch (LHD), electrical circuit 31-LH43 (black), on the wiring harness side, and "weight". – pin 4 C695 of the inoperative power driver seat heating switch (RHD), electrical circuit 31- LH43 (black), on the wiring harness side, and "weight". – pin 4 C695 of the inoperative power passenger seat heating switch (RHD), electrical circuit 31- LH43 (black), on the wiring harness side, and "weight". |
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• Check the legitimacy of the customer's complaint. |
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→ Yes |
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REPAIR chain 32-AJ26 (white). |
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→ No |
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REPAIR circuit 31-LH29 (black) or electrical circuit 31-LH43 (black). CHECK the system is working properly. |
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