*DIAGNOSIS AND CHECKOUT PROCEDURE FOR SEAT WEIGHT SENSORS






1. VERIFY COMPLAINT

Turn the ignition off.
Move the front passenger seat to the full rear position. Verify that the seat is empty, the seat back is in the normal upright position, and that the seat is not interfering with any interior components.
Verify that all related connectors are properly seated and locked.
Turn the ignition on.
With the scan tool in OCM, select Data Display and note the Passenger Seat Weight Sensor voltage for all four sensors (Left Front, Right Front, Left Rear and Right Rear).
Move the front passenger seat to the mid track position.
Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors.
Move the front passenger seat to the full forward position.
Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors. The voltage should be from 1.4 to 3.6 volts for each sensor in each position (full rear, mid track, and full forward).

Is any sensor's voltage reading out of the acceptable range in any position?

Yes


No

2. CHECKING FOR BENT FLOOR PAN

Turn the ignition off.
Loosen all of the mounting screws retaining the front passenger seat to the vehicle crossmembers, but do not remove them. Verify that the seat is loose and that no binding exists between the seat and the crossmembers.
Move the front passenger seat to the full rear position and then to the full forward position.
Tighten all of the mounting screws to specification. Refer to Group 23 for specification.
Move the front passenger seat to the full rear position.
Turn the ignition on.
Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors.
Move the front passenger seat to the mid track position.
Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors.
Move the front passenger seat to the full forward position.
Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors. The voltage should be from 1.4 to 3.6 volts for each sensor in each position.

Is any sensor's voltage reading out of the acceptable range in any position?

Yes


No

3. CHECKING SEAT TO RISER STRESS

Turn the ignition off.
Loosen all of the mounting screws retaining the front passenger seat track to the riser, but do not remove them. Verify that the seat track is loose and that no binding exists between the seat track and the risers.
Turn the ignition on.
Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors. The voltage should be from 1.5 to 3.5 volts for each sensor.

Is any sensor's voltage reading out of the acceptable range?

Yes


No

4. TEST SEAT FRAME

Turn the ignition off.
Remove the front passenger seat from the risers in accordance with the Service Information. Return the risers to their normal mounting position.
Turn the ignition on.
Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors. The voltage should be from 1.4 to 3.6 volts for each sensor.

Is any sensor's voltage reading out of the acceptable range?

Yes


No

5. TEST SENSOR

Turn the ignition off.
Loosen the mounting screws of all of the Seat Weight Sensors, but do not remove them. Verify that the sensors are loose and that no binding exists between the sensors and the risers.
Turn the ignition on.
Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors. The voltage should be from 1.4 to 3.6 volts for each sensor.

Is any sensor's voltage reading out of the acceptable range?

Yes


No

6. CHECKING FOR LOOSE SEAT WEIGHT SENSOR

Turn the ignition off.
Tighten all of the Seat Weight Sensor mounting screws to specification. Refer to Group 23 for specification.
Turn the ignition on.
Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors. The voltage should be from 1.4 to 3.6 volts for each sensor.

Is any sensor's voltage reading out of the acceptable range?

Yes


No

7. TEST SEAT TRACKS

Turn the ignition off.
Mount the front passenger seat on the risers in accordance with service information.
Turn the ignition on.
Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors. The voltage should be from 1.4 to 3.6 volts for each sensor.

Is any sensor's voltage reading out of the acceptable range?

Yes


No