| 1. | Remove the driver's seat. |
| 2. | Disconnect the 4P connector (A) and 2P connector (B) from the seat heater. |
| 3. | Check for continuity between the B1 and B2 terminals of the seat-back heater 2P connector. There should be continuity. |
| 4. | Check for continuity between the A1 and A2 terminals, and the A1 and B2 terminals. There should be continuity. |
| 5. | If the continuity check is not as specified, replace the seat heater. |
| 1. | Remove the passenger's seat. |
| 2. | Disconnect the 4P connector (A) from the seat heater. |
| 3. | Check for continuity between the No.2 and No.3 terminals, and No.3 and No.4 terminals of the 4P connector. There should be continuity. |
| 4. | If the continuity is not as specified, replace the seat heater. |