Pinpoint Test 6: The Heated Seat Is Inoperative

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PINPOINT TEST 6: THE HEATED SEAT IS INOPERATIVE - HYBRID

Normal Operation

The dual automatic temperature control (DATC) module contains the heated seat control buttons and indicators. The heated seat system functions independently from the climate control system. A heated seat relay is located underside of each heated seat cushion frame. There are 2 voltage supplies to the heated seat relay. Voltage is supplied from the smart junction box (SJB) heated seat relay enable circuit (GY) to each heated seat relay coil when the ignition key is on. Ground is supplied to the opposite side of the driver or passenger relay coil by the DATC module. The driver heated seat relay drive circuit (W/L) or passenger heated seat relay drive circuit (GY/Y) is powered when a heated seat switch button is pressed to energize the affected relay. This closes the relay contact to supply battery voltage from the battery junction box (BJB) circuit (Y/R) to the driver heater element circuit (V/G) or the passenger heater element circuit (Y/G). The driver and passenger heater elements are directly connected to ground circuit (B/GY) completing the electrical circuit to heat the seats.

Possible Causes
- Fuse(s)
- Wiring, terminals or connectors
- DATC module

Diagnostic Procedure


NOTE: The air bag warning indicator illuminates when the restraints control module (RCM) fuse is removed and the key is in the ON position. This is normal operation and does not indicate a supplemental restraint system (SRS) fault.

NOTE: The supplemental restraint system (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

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