For 1990-2009 cars

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Test the heated seat. Is the heated seat operative? | -- | System OK | Go to Step 2
2 | Inspect fuse F20. Is fuse F20 open? | -- | Go to Step 3 | Go to Step 4
3 |

1. Test for a short circuit and repair the short circuit, if necessary.
2. Replace the fuse F20.

Is the repair complete?

--

System OK

--

4 | Use a voltmeter to test the voltage at terminal 5 of both the left and the right heated seat switch. Is the voltage within the specified value? | 11-14 V | Go to Step 6 | Go to Step 5
5 | Repair the open circuit between the fuse F20 and terminal 5 of the heated seat switch. Is the repair complete? | -- | System OK | --
6 |

1. Turn the ignition switch ON.
2. Turn the heated seat switch ON.
3. Use the voltmeter to test the voltage at terminal 2 of both the left and the right heated seat switch.

Is the voltage within the specified value?

11-14 V

Go to Step 8

Go to Step 7

7 | Replace the heated seat switch. Refer to Front Seat Heater Switch Replacement . Is the repair complete? | -- | System OK | --
8 |

1. Turn the ignition switch ON.
2. Turn the heated seat switch ON.
3. Use the voltmeter to test the voltage at terminal 1 of the heated seat.

Is the voltage within the specified value?

11-14 V

Go to Step 10

Go to Step 9

9 | Repair the open circuit between terminal 1 and terminal 2 of the left or the right heated seat. Is the repair complete? | -- | System OK | --
10 |

1. Turn the ignition switch ON.
2. Turn the heated seat switch ON.
3. Use the voltmeter to test the voltage at terminal 2 of the heated seat.

Is the voltage within the specified value?

11-14 V

Go to Step 12

Go to Step 11

11 | Replace the left or the right heated seat. Refer to Front Seat Heater Element Replacement . Is the repair complete? | -- | System OK | --
12 | Replace the open ground circuit. Is the repair complete? | -- | System OK | --