Power Seat Inoperative. Cadillac CTS 2005

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2005 🢒 CTS 🢒 Body 🢒 Seats 🢒 Power Seat Inoperative

Power Seat Inoperative w/o A45

Step	Action	Yes	No
Schematic Reference: Driver Seat Schematics or Passenger Seat Schematics Connector End View Reference: Power Seat Connector End Views DEFINITION: One or more of the power seat functions are inoperative.
1	Did you review the power seat system description and operation and perform the necessary inspections?	Go to Step 2	Go to Symptoms - Seats
2	Verify that the power seat inoperative complaint is present. Attempt to operate all of the power seat motors through their full range of adjustment. Does the power seat system operate as described in the system description and operation?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Are all of the power seat motors inoperative?	Go to Step 4	Go to Step 6
4	Disconnect the seat adjuster switch. 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 5	Go to Step 10
5	Connect a test lamp from the battery positive voltage circuit of the switch connector to the ground circuit of the switch connector. Does the test lamp illuminate?	Go to Step 9	Go to Step 11
6	Disconnect the inoperative seat motor. Connect a test lamp between the motor control circuits of the harness connector. Operate the appropriate seat switch in both directions. Does the test lamp illuminate in both directions?	Go to Step 8	Go to Step 7
7	Test the motor control circuits for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 9
8	Inspect for poor connections at harness connector of the inoperative seat motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 13
9	Inspect for poor connections at harness connector of the seat adjuster switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 12
10	Repair the short to ground or open in the battery positive voltage circuit of the seat adjuster switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems. Did you complete the repair?	Go to Step 14	--
11	Repair the open in the ground circuit of the seat adjuster switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems. Did you complete the repair?	Go to Step 14	--
12	Replace the seat adjuster switch . Refer to Power Seat Switch Replacement . Did you complete the replacement?	Go to Step 14	--
13	Replace the seat motor. Refer to Seat Adjuster Motor Replacement - Horizontal , Seat Adjuster Motor Replacement - Vertical , or Front Seat Recliner Actuator Motor Replacement . Did you complete the replacement?	Go to Step 14	--
14	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Power Seat Inoperative with A45

Test Description

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

This step tests the integrity of the signal circuits of the seat adjuster switch. If the fuse in the jumper wire opens when you perform this test, a short to ground may have occurred.

Step	Action	Yes	No
Schematic Reference: Driver Seat Schematics Connector End View Reference: Power Seat Connector End Views DEFINITION: One or more of the power seat functions are inoperative.
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Verify that the power seat inoperative complaint is present. Attempt to operate all of the power seat motors through their full range of adjustment. Does the power seat system operate as described in the system description and operation?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Are all of the power seat motors inoperative?	Go to Step 4	Go to Step 7
4	Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe any seat switch parameter in the Memory Seat Module (MSM) data list. Operate the seat switch in the direction of the observed parameter. Does the observed seat switch parameter change state?	Go to Step 14	Go to Step 5
5	Probe the battery positive voltage circuit of the seat adjuster switch with a test lamp that is connected to a good ground. Does the test lamp illuminate?	Go to Step 6	Go to Step 15
6	Probe any one of the seat switch signal circuits of the seat adjuster switch with a test lamp that is connected to a good ground. Operate the appropriate seat switch. Does the test lamp illuminate?	Go to Step 14	Go to Step 13
7	Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the inoperative seat switch parameters in the Memory Seat Module data list. Operate the appropriate seat switch in both directions. Does the seat switch parameters change state in both directions?	Go to Step 9	Go to Step 8
8	Disconnect the seat adjuster switch. Connect a 3-amp fused jumper wire between the battery voltage circuit of the harness connector and the suspect switch signal circuit of the harness connector. With a scan tool, observe the appropriate seat switch parameter. Does the seat switch parameter change state?	Go to Step 13	Go to Step 10
9	Disconnect the inoperative seat motor. Connect a test lamp between the motor control circuits of the harness connector. Operate the appropriate seat switch in both directions. Does the test lamp illuminate in both directions?	Go to Step 12	Go to Step 11
10	Test the suspect switch signal circuit between the seat adjuster switch and the MSM for an open. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 14
11	Test the motor control circuits between the MSM and the inoperative seat motor for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 14
12	Inspect for poor connections at the harness connector of the inoperative seat motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 17
13	Inspect for poor connections at the harness connector of the seat adjuster switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 16
14	Inspect for poor connections at the harness connector of the memory seat module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 18
15	Repair the short to ground or open in the battery positive circuit of the seat adjuster switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	--
16	Replace the seat adjuster switch. Refer to Power Seat Switch Replacement . Did you complete the replacement?	Go to Step 19	--
17	Replace the inoperative seat motor. Refer to Seat Adjuster Motor Replacement - Horizontal , Seat Adjuster Motor Replacement - Vertical , or Front Seat Recliner Actuator Motor Replacement . Did you complete the replacement?	Go to Step 19	--
18	Replace the MSM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement?	Go to Step 19	--
19	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2