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 TO POWER SEAT CONTROL SWITCH |
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1Enter the OFF position. |
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2Disconnect Inoperative Power Seat Control Switch - C715. |
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3Enter the ON position. |
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4Measure the voltage between power seat control switch C715 pin 2, circuit 29-AH6 (Orange/Yellow), harness side and ground. |
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• Is the voltage more than 10V? |
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→ Yes |
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Go to C2 |
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→ No |
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REPAIR electrical circuit 29-AH6 (orange/yellow). CHECK for proper system operation. |
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C2: CHECK POWER SEAT CONTROL SWITCH GROUND CIRCUIT FOR OPEN |
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1Enter the OFF position. |
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2Measure the resistance between pin 3 C715 of the power seat control switch, circuit 31-AH6 (Black), harness side and ground. |
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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 electrical circuit 31-AH6 (black). CHECK for proper system operation. |
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C3: CHECK VOLTAGE IN THE LOWERING CIRCUIT SUPPLIED TO THE POWER SEAT HEIGHT ADJUSTMENT MOTOR |
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1Connect Inoperative Power Seat Control Switch - C715. |
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2Disconnect Inoperative Power Seat Height Adjustment Motor - C761. |
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3Enter the ON position. |
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4Press the power seat control switch to the DOWN position. |
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5Measure the voltage between power seat height adjustment motor C761 pin 1, circuit 32-AH10 (WH/BK), harness side and ground. |
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• Is the voltage more than 10V? |
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→ Yes |
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Go to C4 |
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→ No |
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REPAIR electrical circuit 32-AH10 (white/black). CHECK for proper system operation. |
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C4: CHECK VOLTAGE IN LIFT CIRCUIT TO POWER SEAT HEIGHT ADJUSTMENT MOTOR |
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1Press the power seat control switch to the UP position. |
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2Measure the voltage between power seat height adjustment motor C761 pin 2, circuit 33-AH10 (YE/BLK), harness side and ground. |
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• Is the voltage more than 10V? |
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→ Yes |
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INSTALL a new power seat height adjustment motor CHECK the system for proper operation. |
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→ No |
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REPAIR electrical circuit 33-AH10 (yellow/black). CHECK system for proper operation. |
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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 VOLTAGE SUPPLIED TO SEAT HEATING SWITCH |
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1Enter the ON position. |
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2Press 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 THE HEATER MATS OF THE INOPERATING HEATED SEAT |
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1Enter the OFF position. |
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2Disconnect Inoperative Heated Seat - C30 or C31. |
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3Enter the ON position. |
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4Press the seat heating switch. |
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5Measure the voltage between: – pin 5 C30 driver's power heated seat cushion (LHD), electrical circuit 15S-HC8 (green/red), wiring harness side, and ground. – pin 5 C31 passenger seat cushion with electric drive and heating (LHD), electrical circuit 15S-HC11 (green/white), wiring harness side, and ground. – pin 5 C31 driver's power heated seat cushion (RHD), circuit 15S-HC11 (green/white), wiring harness side, and ground. – pin 5 C30 passenger seat cushion with electric drive and heating (RHD), electrical circuit 15S-HC8 (green/red), wiring harness side, and ground. |
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• Is the voltage more than 10V? |
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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 circuit 15S-HC11 (green/white). CHECK system operation for proper operation. |
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D3: CHECK SEAT CUSHION HEATER MAT GROUND CIRCUIT FOR OPEN |
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1Enter the OFF position. |
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2Measure the resistance between: – pin 12 C30 of the driver's seat back with electric drive and inoperative heating (LHD), electrical circuit 31-HC8 (black), on the wiring harness side, and "ground". – pin 12 C31 of the passenger seatback with electric drive and inoperative heating (LHD), electrical circuit 31-HC11 (black), on the wiring harness side, and ground. – pin 12 C31 of the driver's seat back with electric drive and inoperative heating (RHD), electrical circuit 31-HC11 (black), on the wiring harness side, and "ground". – pin 12 C30 of the passenger seatback with electric drive and inoperative heating (RHD), electrical circuit 31-HC8 (black), on the wiring harness side, and ground. |
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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 circuit 31-HC11 (black). CHECK for proper system operation. |
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D4: CHECK SEAT CUSHION HEATER MAT CIRCUIT FOR OPEN |
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1Measure the resistance of the heating elements between: – pin 5 C30 driver's heated power seat cushion inoperative (LHD), circuit 15S-HC8 (green/red), element side, and pin 6 C30 non-heated power seat cushion inoperative, circuit 15S-HC7 (green/blue), element side. – pin 5 C31 passenger power heated seat cushion (LHD), circuit 15S-HC11 (green/white), element side, and pin 6 C31 non-power heated seat cushion, circuit 15S-HC10 (green/orange), element side. – pin 5 C31 driver's heated power seat cushion (RHD), circuit 15S-HC11 (green/white), element side, and pin 6 C31 non-heated power seat cushion, circuit 15S-HC10 (green/orange), element side. – pin 5 30 of the passenger seat cushion with electric drive and inoperative heating (RHD), electrical circuit 15S-HC8 (green/red), on the element side, and pin 6 C30 of the inoperative heated seat cushion, electrical circuit 15S-HC7 (green/blue), on the element side. |
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• Is the resistance 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 for proper operation. |
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D5: CHECK SEAT BACK HEATER MAT CIRCUIT FOR OPEN |
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1Measure the resistance of the heating elements between: – pin 11 C30 driver's power seatback with inoperative heating (LHD), circuit 15S-HC7 (green/blue), element side, and pin 12 C30 inoperative heated seatback, circuit 31-HC8 (black), element side. – pin 11 C31 passenger seatback with electric drive and inoperative heated seat (LHD), electrical circuit 15S-HC10 (green/orange), element side, and pin 12 C31 inoperative heated seatback, electrical circuit 31-HC11 (black), element side. – pin 11 C31 driver's heated power seatback inoperative (RHD), circuit 15S-HC10 (green/orange), element side, and pin 12 C31 heated power seatback inoperative, circuit 31-HC11 (black), element side. – pin 11 C30 passenger seatback with power and inoperative heated seat (RHD), circuit 15S-HC7 (green/blue), element side, and pin 12 C30 passenger seatback with inoperative heated seat, circuit 31-HC8 (black), element side. |
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• Is the resistance 9 ohms (resistance of one heater mat)? |
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→ Yes |
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REPAIR circuit 15S-HC7 (green/blue) or circuit 15S-HC10 (green/orange). CHECK for proper system operation. |
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→ No |
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INSTALL a new heater mat. CHECK the system for proper operation. |
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D6: CHECK IGNITION VOLTAGE AT SEAT HEATING SWITCH |
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1Enter the OFF position. |
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2Disconnect Inoperative Seat Heater Switch - C694 or C695. |
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3Enter the ON position. |
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4Measure the voltage between: – pin 2 C694 of the inoperative driver's power seat heater switch (LHD), circuit 15-HC6 (green/yellow), harness side, and ground. – pin 2 C695 of the inoperative passenger power seat heater switch (LHD), circuit 15-HC9 (green/black), wiring harness side, and ground. – pin 2 C695 of the inoperative driver's power seat heater (RHD) switch, circuit 15-HC9 (green/black), harness side, and ground. – pin 2 C694 of the inoperative passenger power seat heater (RHD) switch, circuit 15- HC6 (green/yellow), wiring harness side, and ground. |
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• Is the voltage more than 10V? |
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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 circuit 15-HC9 (green/black). CHECK for proper system operation. |
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D7: CHECK SEAT HEATING SWITCH GROUND CIRCUIT FOR OPEN |
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1Enter the OFF position. |
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2Measure the resistance between: – pin 4 C694 of the inoperative driver's power seat heater switch (LHD), circuit 31-LH29 (black), wiring harness side, and ground. – pin 4 C695 of the inoperative passenger power seat heater switch (LHD), circuit 31-LH43 (black), wiring harness side, and ground. – pin 4 C695 of the inoperative driver's power seat heater switch (RHD), electrical circuit 31- LH43 (black), wiring harness side, and ground. – pin 4 C695 of the inoperative passenger power seat heater switch (RHD), electrical circuit 31- LH43 (black), wiring harness side, and ground. |
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• Check the validity 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 circuit 31-LH43 (black). CHECK for proper system operation. |
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