GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 SRX 🢒 Body 🢒 Seats 🢒 Power Third Row Seat Inoperative

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step ensures that the correct procedures are used when attempting to verify the operation of the rear folding seat. The rear seat module (RSM) must be enabled before the rear folding seat system will operate. Enabling the RSM using the remote keyless entry transmitter or the driver door/passenger door lock switch unlock sequence allows for the system to operate for 120 seconds before timing out. The RSM will restart the timing procedure after each time the recline or stow switch is pressed. Enabling the RSM by placing the ignition in either the ON or ACCESSORY positions allows for continuous operation of the folding seat system without the time out feature.

    2.

  2. This step verifies if the rear seat module (RSM) is calibrated. The module must be calibrated in order for the folding seat system to operate.

    3.

  3. This step determines from which stow switch the folding seat is inoperative.

    4.

  4. This step checks the existing state of the back panel position switch by using the current state of the switch parameter. If the power folding seat is in a position other than the seated or stowed position, the back panel position switch should be open and the Back Panel Position Switch parameter should display Inactive.

    5.

  5. This step checks the existing state of the load floor position switch by using the current state of the switch parameter. When the back panel is in the folded position the load floor position switch should be closed to voltage and the Load Floor Position Switch parameter should display Inactive.

Step

Action

Values

Yes

No

Schematic Reference: Rear Seat Schematics

Connector End View Reference: Power Seat Connector End Views

DEFINITION: The power folding rear seat is inoperative from just one or both of the seat stow switches.

1

Did you perform the Diagnostic System Check - Vehicle?

--

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Enable the RSM by placing the gear selector in PARK, opening the rear liftgate or the right rear passenger door, and performing one of the following:
    2. • Turn On the ignition, with the engine Off.
    • Press the remote keyless entry transmitter unlock button 3 times within 5 seconds.
    • Press the driver or passenger door lock switch unlock button 3 times within 5 seconds.
  2. Verify that the Power Seat Inoperative - Folding Seat complaint is present.

Does the power folding seat operate as described in the system description and operation?

--

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Is the rear folding seat inoperative from both stow switches?

--

Go to Step 4

Go to Step 6

4

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Calibrated parameter in the Rear Seat Module data list.

Does the Calibrated parameter display Yes?

--

Go to Step 5

Go to Power Folding Seat Calibration

5
  1. With a scan tool, clear all DTC Information in the Rear Seat Module data list.
  2. With a scan tool, observe the History Diagnostic Trouble Code(s) list in the Rear Seat Module data list.
  3. Attempt to operate the power folding seat.

Did the RSM set a history overcurrent DTC?

--

Go to Diagnostic Trouble Code (DTC) List - Vehicle

Go to Step 9

6

Is the rear folding seat inoperative from just the front stow switch?

--

Go to Step 7

Go to Step 8

7
  1. Open the right rear passenger door.
  2. With a scan tool, observe the Rt. Rear Door Jamb Sw. parameter in the Right Rear Door Module data list.

Does the Rt. Rear Door Jamb Sw. parameter display On?

--

Go to Step 16

Go to Door Ajar Indicator Malfunction

8
  1. Open the liftgate.
  2. With a scan tool, observe the Liftgate Ajar Indicator Switch parameter in the Rear Integration Module data list.

Does the Liftgate Ajar Indicator Switch parameter display Ajar?

--

Go to Step 16

Go to Rear Hatch/Gate Ajar Indicator Inoperative

9

Is the folding seat stuck in a position other than the seated or stowed positions?

--

Go to Step 10

Go to Step 11

10

With a scan tool, observe the Back Panel Position Switch parameter in the Rear Seat Module data list.

Does the scan tool display Active?

--

Go to Step 14

Go to Step 11

11

With a scan tool, observe the Load Floor Switch parameter in the Rear Seat Module data list.

Does the scan tool display Active?

--

Go to Step 13

Go to Step 12

12
  1. With a scan tool, observe either one of the Stow Switch parameters in the Rear Seat Module data list.
  2. Press the observed Stow Switch.

Does the observed Stow Switch parameter display Active?

--

Go to Step 24

Go to Step 15

13
  1. Disconnect the rear seat module connector C2.
  2. Verify that the seat back panel is in the folded position.
  3. Measure the resistance between the load floor position switch supply voltage circuit and the load floor position switch signal circuit of the module connector.

Does the resistance measure less than the specified value?

5 ohms

Go to Step 24

Go to Step 20

14
  1. Disconnect the rear seat module connector C2.
  2. Measure the resistance between the back panel position switch supply voltage circuit and the back panel position switch signal circuit of the module connector.

Does the resistance measure less than the specified value?

5 ohms

Go to Step 22

Go to Step 19

15
  1. Disconnect either one of the stow switch connectors.
  2. Connect a test lamp from the battery positive voltage circuit of the switch connector to a good ground.

Does the test lamp illuminate?

--

Go to Step 24

Go to Step 25

16
  1. Disconnect the inoperative stow switch connector.
  2. Connect a test lamp from the battery positive voltage circuit of the switch connector to a good ground.

Does the test lamp illuminate?

--

Go to Step 17

Go to Step 25

17
  1. With a scan tool, observe the inoperative Stow Switch parameter in the Rear Seat Module data list.
  2. Connect a 3-amp fused jumper wire between the battery positive voltage circuit of the switch connector and the switch signal circuit of the connector.

Does the observed Stow Switch parameter display Active?

--

Go to Step 23

Go to Step 18

18

Test the signal circuit of the inoperative stow switch for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 30

Go to Step 24

19

Test the signal circuit of the back panel position switch for a short to battery voltage. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 30

Go to Step 24

20

Test the supply voltage circuit and the signal circuit of the load floor position switch for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 30

Go to Step 21

21

Inspect for poor connections at the harness connector of the load floor position switch. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 30

Go to Step 26

22

Inspect for poor connections at the harness connector of the back panel position switch. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 30

Go to Step 26

23

Inspect for poor connections at the harness connector of the inoperative folding seat stow switch. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 30

Go to Step 28

24

Inspect for poor connections at the harness connector of the rear seat module (RSM). Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 30

Go to Step 29

25

Repair the short to ground or open in the battery positive voltage circuit of the folding seat stow switch. Refer to Wiring Repairs .

Did you complete the repair?

--

Go to Step 30

--

26

Replace the seat back panel load floor position switch. Refer to Rear Seat Number 2 Seat Back Presence Sensor Replacement .

Did you complete the replacement?

--

Go to Step 30

--

27

Replace the seat back panel position switch. Refer to Rear Seat Number 2 Folding Actuator Seat Position Switch Replacement .

Did you complete the replacement?

--

Go to Step 30

--

28

Replace the inoperative folding seat stow switch. Refer to Rear Seat Number 2 Folding Actuator Switch Replacement - Rear Quarter Trim Rear or Rear Seat Number 2 Folding Actuator Switch Replacement - Rear Quarter Trim Front .

Did you complete the replacement?

--

Go to Step 30

--

29

Replace the RSM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

--

Go to Step 30

--

30

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2