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HOMESERVICE MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 56 (POWER SEAT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESMEMORY SEAT FEATURE INOPERATIVE
2009 Chevrolet Tahoe Base, 4.8 C

Memory Seat Feature Inoperative

2009 Chevrolet Tahoe Base, 4.8 CSECTION Memory Seat Feature Inoperative
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Memory Seat Feature Inoperative

Step Action Values Yes No
Schematic Reference: Driver Seat Schematics 
Connector End View Reference: Power Seat Connector End Views 
DEFINITION: One or more of the memory recall functions are inoperative.
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2 Attempt to set and recall memory 1, memory 2, and exit seat position settings.
Does the system operate normally?		 - Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3
  1. Install a scan tool.
  2. Observe the Memory Switch parameter in the driver door switch data list.
  3. Press the memory 1 switch.
Does the scan tool display the memory 1 switch as Active only while the switch is pressed?		 - Go to Step 4  Go to Step 6 
4
  1. Observe the Memory Switch parameter in the driver door switch data list.
  2. Press the memory 2 switch.
Does the scan tool display the memory 2 switch as Active only while the switch is pressed?		 - Go to Step 5  Go to Step 7 
5
  1. Observe the Memory Switch parameter in the driver door switch data list.
  2. Press the EXIT switch.
Does the scan tool display the EXIT switch as Active only while the switch is pressed?		 - Go to Step 11  Go to Step 8 
6
  1. Disconnect the memory switch connector from the driver door switch.
  2. Using a DMM, test the resistance through the memory switch from the switch supply voltage circuit terminal to the memory switch signal circuit terminal in the pigtail connector. Refer to Circuit Testing and to Wiring Repairs .
  3. Press the memory 1 switch.
Is the resistance at or near the specified value only while the switch is pressed?		 2.26K Ω Go to Step 12  Go to Step 10 
7
  1. Disconnect the memory switch connector from the driver door module.
  2. Using a DMM, test the resistance through the memory switch from the switch supply voltage circuit terminal to the memory switch signal circuit terminal in the pigtail connector. Refer to Circuit Testing and to Wiring Repairs .
  3. Press the memory 2 switch.
Is the resistance at or near the specified value only while the switch is pressed?		 4.26K Ω Go to Step 12  Go to Step 10 
8
  1. Disconnect the memory switch connector from the driver door module.
  2. Using a DMM, test the resistance through the memory switch from the switch supply voltage circuit terminal to the memory switch signal circuit terminal in the pigtail connector. Refer to Circuit Testing and to Wiring Repairs .
  3. Press the EXIT switch.
Is the resistance at or near the specified value only while the switch is pressed?		 9.25K Ω Go to Step 9  Go to Step 10 
9 Test the memory switch signal circuits in the switch harness for a short to ground or voltage. Refer to Circuit Testing .
Are either of the switch signal circuits shorted to ground or voltage?		 - Go to Step 13  Go to Step 12 
10 Inspect for poor connections at the memory switch connector. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 13 
11 Inspect for poor connections at the driver seat module connectors. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 14 
12 Inspect for poor connections at the driver door switch connector. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 15 
13 Replace the memory switch. Refer to Heated Seat Switch Replacement - Front (w/o KB6) .
Is the repair complete?		 - Go to Step 16  -
14 Replace the driver seat module. Refer to Control Module References for replacement, setup, and programming.
Is the repair complete?		 - Go to Step 16  -
15 Replace the driver door switch. Refer to Control Module References for replacement, setup, and programming.
Is the repair complete?		 - Go to Step 16  -
16 Operate the memory seat system to verify the repair.
Did you correct the condition?		 - System OK Go to Step 3 
RENDER: 1.0x

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