Schematic Reference: Passenger Seat Schematics

Connector End View Reference: Power Seat Connector End Views

Did you review the description and operation and perform the necessary inspections?

Go to Step 2

Go to Sit-N-Lift Mobility Seat Description and Operation

Verify the fault is present.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

Determine if the mobility seat module has any stored trouble codes. Refer to On-Board Diagnostic Features .

Does the mobility seat module flash a code 11?

Go to Step 4

Go to Diagnostic Trouble Code (DTC) List - Vehicle

1. Open the RR sliding door.
2. Attempt to turn on the hand held remote by pressing the red power button.

Does the red LED on the hand held remote illuminate?

Go to Step 5

Go to Step 9

1. Place the transmission in the PARK position.
2. Turn the ignition OFF.
3. Open the RR sliding door.
4. Disconnect the mobility seat module connector C2.
5. Using a test lamp connected to a good ground test the park switch signal circuit in the module harness connector.

Does the test lamp illuminate?

Go to Step 6

Go to Step 12

1. With the transmission in the PARK position, turn the ignition ON.
2. Close the RR sliding door.
3. Using a test lamp connected to a good ground test the park switch signal circuit in the module harness connector.

Does the test lamp illuminate?

Go to Step 7

Go to Step 13

1. Open the RR sliding door.
2. Turn the hand held remote power ON.
3. Using a DMM measure the voltage of the remote hand held down switch signal circuit in the module harness connector C2.
4. Press and release the down switch on the hand held remote.

Does the signal circuit voltage change from low to high when the switch is pressed?

Go to Step 8

Go to Step 14

1. Using a DMM measure the voltage of the remote hand held up switch signal circuit in the module harness connector C2.
2. Press and release the up switch on the hand held remote.

Does the signal circuit voltage change from high to low when the switch is pressed?

Go to Step 24

Go to Step 15

1. Open the RR sliding door.
2. Disconnect the hand held remote to mobility seat harness connector.
3. Connect a test lamp from the voltage supply circuit terminal in the seat harness connector to a good ground.

Does the test lamp illuminate?

Go to Step 10

Go to Step 11

Connect a test lamp from battery voltage to the hand held remote ground circuit terminal in the seat harness connector to a good ground.

Does the test lamp illuminate?

Go to Step 21

Go to Step 18

1. Disconnect the door jamb switch relay.
2. Using a test lamp connected to ground test the battery voltage supply circuit terminals 5 and 2 to the relay.

Does the test lamp illuminate on both terminals?

Go to Step 16

Go to Step 19

1. Place the transmission in the PARK position.
2. Disconnect the door jamb switch relay.
3. Using a test lamp connected to ground test the park switch signal circuit terminal 7 to the relay.

Does the test lamp illuminate?

Go to Step 17

Go to Step 20

1. Disconnect the ignition relay.
2. Test the park switch signal circuit from the relay connector terminal 6 to the module for an open or short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 26

Go to Step 22

1. Disconnect the hand held remote to mobility seat harness connector.
2. Test the down switch signal circuit to the module for an open or short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 26

Go to Step 21

1. Disconnect the hand held remote to mobility seat harness connector.
2. Test the up switch signal circuit to the module for an open or short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 26

Go to Step 21

Test the voltage supply circuit from the door jamb switch relay to the hand held remote connector for an open or short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 26

Go to Step 23

Test the park switch signal circuit from the door jamb switch relay to the module for an open or short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 26

Go to Step 23

Repair the hand held remote ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Is the repair complete?

Go to Step 26

--

Repair the battery voltage supply circuit to the door jamb switch relay for an open or short to ground. Refer to Circuit Testing and Wiring Repairs .

Is the repair complete?

Go to Step 26

--

Repair the park switch signal circuit to the door jamb switch relay for an open or short to ground. Refer to Circuit Testing and Wiring Repairs .

Is the repair complete?

Go to Step 26

--

Replace the hand held remote.

Is the repair complete?

Go to Step 26

--

Replace the ignition relay.

Is the repair complete?

Go to Step 26

--

Replace the door jamb switch relay.

Is the repair complete?

Go to Step 26

--

Inspect for poor connections at the mobility seat module harness connectors. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 26

Go to Step 25

Replace the mobility seat module. Refer to Sit-N-Lift Control Module Replacement .

Is the repair complete?

Go to Step 26

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3