System Operation Check

Trouble shooting of a power seat and/or seat heater system complaint begins with verification of the customer problem. If problem occurs, go to step 3. If problem does not occur, go to next step.
If problem does not occur, review conditions under which problem occurred for customer and try to duplicate those conditions. For example, if the problem occurs on rainy days or during high humidity conditions, sprinkle water onto vehicle and see if malfunction occurs. DO NOT sprinkle water directly into engine compartment or onto electronic components. Visually inspect for signs of mechanical and electrical damage. Inspect for blown fuses and damaged relays. Inspect for loose or corroded connections, damaged wiring harnesses and/or switches. Check for a broken or partially broken wire inside insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected. Ensure any aftermarket electronic equipment is properly installed. If fault is found, repair as necessary.

Determine problem symptom. See PROBLEM SYMPTOM INDEX table.

PROBLEM SYMPTOM INDEX

Symptom

Suspected Area ⁽¹⁾

Power Seat Control System

Driver's Seat Does Not Operate

⁽²⁾⁽³⁾⁽⁴⁾

Slide Operation Does Not Operate

⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁹⁾

Front Vertical Operation Does Not Operate

⁽³⁾⁽⁴⁾⁽⁶⁾⁽⁹⁾

Lifter Operation Does Not Operate

⁽³⁾⁽⁴⁾⁽⁷⁾⁽⁹⁾

Reclining Operation Does Not Operate

⁽³⁾⁽⁴⁾⁽⁸⁾⁽⁹⁾

Seat Heater System

Driver's &/Or Passenger's Seat Heater Does Not Operate

⁽¹⁰⁾⁽¹¹⁾⁽¹²⁾⁽⁴⁾

Seat Heater Temperature Is Too Hot

⁽¹²⁾

⁽¹⁾	Perform test procedures in order listed under suspected area.

⁽²⁾	Check the P/SEAT fuse located in the engine room No. 1 relay block.

⁽³⁾	Check the power seat switch. See POWER SEAT SWITCH under COMPONENT TESTS and POWER SEAT SWITCH CIRCUIT under CIRCUIT TESTS.

⁽⁴⁾	Check the wiring harness.

⁽⁵⁾	Check the slide motor. See POWER SEAT MOTOR (SLIDE, FRONT VERTICAL, LIFTER & RECLINING) under COMPONENT TESTS.

⁽⁶⁾	Check the front vertical motor. See POWER SEAT MOTOR (SLIDE, FRONT VERTICAL, LIFTER & RECLINING) under COMPONENT TESTS.

⁽⁷⁾	Check the lifter motor. See POWER SEAT MOTOR (SLIDE, FRONT VERTICAL, LIFTER & RECLINING) under COMPONENT TESTS.

⁽⁸⁾	Check the reclining motor. See POWER SEAT MOTOR (SLIDE, FRONT VERTICAL, LIFTER & RECLINING) under COMPONENT TESTS.

⁽⁹⁾	Check the appropriate MOTOR PTC THERMISTOR opertion. See COMPONENT TESTS .

⁽¹⁰⁾	Check the SEAT HTR fuse located in the driver side junction block.

⁽¹¹⁾	Check the seat heater switch. See SEAT HEATER SWITCH under COMPONENT TESTS.

⁽¹²⁾	Check the seat heater. See SEAT HEATER BACK and SEAT HEATER CUSHION under COMPONENT TESTS.

After repairs have been completed, confirm that problem has been eliminated. Operate the system under same conditions recorded for original complaint. If problem is no longer present, repair has corrected problem. If problem is still present, further diagnosis and repair is required.