Pinpoint Test S: The Heated Seat Does Not Operate Correctly - Left Rear Heated Seat Indicator is Always On

Seats

Pinpoint Test S: The Heated Seat Does Not Operate Correctly - Left Rear Heated Seat Indicator is Always On

Normal Operation

Pressing the left rear heated seat switch once in either the high or low mode will activate the left rear heated seat. Voltage is then supplied from the heated seat module to the appropriate switch indicator circuit CHS48 (YE) (high heat mode) or CHS49 (VT) (low heat mode) to illuminate the switch indicator. Pressing the switch button again (in the same mode) will deactivate the seat and indicator.

A new heated seat module must be configured after installation for correct operation. To configure, press the low heat mode button on the either rear heated seat switch. Module configuration will occur automatically after the low heat mode button is pressed. Until the module is correctly configured, the heated seats will operate incorrectly when selecting the high heat mode by following a sequence of high, low and off with each button press. The system will operate correctly after the heated seat module receives a low heat request on either of the low heat request circuits and rear heated seat module configuration is activated.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Heated seat module

PINPOINT TEST S : THE HEATED SEAT DOES NOT OPERATE CORRECTLY - LEFT REAR HEATED SEAT INDICATOR IS ALWAYS ON

S1 CHECK CIRCUITS CHS49 (VT) AND CHS48 (YE) FOR A SHORT TO VOLTAGE

- Disconnect: Heated Seat Module C3304a.

Did the affected high or low indicator LED turn off when the heated seat module was disconnected?

Yes
INSTALL a new heated seat module. REFER to Heated Seat Module - Rear . TEST the system for normal operation.

No
REPAIR circuit CHS49 (VT) or CHS48 (YE) for a short to voltage. TEST the system for normal operation.