SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C1500, 5.3 ZREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMESEATSSEAT SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESHEATED/COOLED SEATS INOPERATIVE
2006 Chevrolet Suburban C1500, 5.3 Z

Heated/Cooled Seats Inoperative

2006 Chevrolet Suburban C1500, 5.3 ZSECTION Heated/Cooled Seats Inoperative
Heated/Cooled Seats Inoperative

Step Action Values Yes No
Schematic Reference: Driver Seat Schematics , Passenger Seat Schematics , and Rear Seat Schematics 
DEFINITION: One or more of a heated/cooled seat function is inoperative but the switch indicators operate normal.
1 Did you review the Heated/Cooled Seats Description and Operation and perform the necessary inspections? - Go to Step 2  Go to Symptoms - Seats 
2 Verify the fault is present.
Does the system operate normally?		 - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3
  1. Turn the ignition ON.
  2. Operate the heat/cool seat switch in all of the operating modes and temperature levels.
Do the heat/cool seat switch indicators operate normally?		 - Go to Step 4  Go to Heated/Cooled Seat Switch Indicator Malfunction 
4 Do either of the blower motors operate for at least 4 seconds? - Go to Step 7  Go to Step 5 
5
  1. Using a DMM, measure the voltage of the mode signal circuit to the CCSM by backprobing the terminal in the body harness to seat harness inline connector.
  2. Start the engine.
  3. Operate the heat/cool seat switch through all of the operating modes.
Does the mode signal circuit voltage begin at battery positive in OFF and change each time the next operating mode is selected?		 - Go to Step 9  Go to Step 6 
6
  1. Turn the ignition OFF.
  2. Disconnect the signal converter connector C3.
  3. Using a DMM, measure the mode signal circuit voltage from the affected CCSM at the harness connector terminal.
  4. Turn the ignition ON.
Is the circuit voltage at or near the specified value?		 12 V Go to Step 31  Go to Step 8 
7
  1. Cycle the ignition OFF and ON.
  2. Operate the seat in the high heat mode and quickly switch to back only operation.
Does the back only heat mode operate normally for more than 1 minute?		 - Go to Step 12  Go to Step 13 
8 Test the mode signal circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 39  Go to Step 9 
9
  1. Disconnect the CCSM connector C1.
  2. Connect a test lamp from the battery voltage supply circuit terminal in the harness connector to a good ground.
Does the test lamp illuminate?		 - Go to Step 10  Go to Step 28 
10 Connect a test lamp from the ignition voltage supply circuit terminal in the CCSM harness connector to a good ground.
Does the test lamp illuminate?		 - Go to Step 11  Go to Step 29 
11 Connect a test lamp from battery voltage to the ground circuit terminal in the CCSM harness connector.
Does the test lamp illuminate?		 - Go to Step 32  Go to Step 30 
12
  1. Cycle the ignition OFF and ON.
  2. Operate the seat in the high cool mode.
Does the seat cushion blower motor operate for at least several seconds?		 - Go to Step 14  Go to Step 18 
13
  1. Cycle the ignition OFF and ON.
  2. Operate the seat in the high cool mode.
Does the seat back blower motor operate for at least several seconds?		 - Go to Step 16  Go to Step 20 
14
  1. Disconnect the seat cushion heat/cool ventilation blower harness connector.
  2. Measure the resistance through the seat cushion TED from the heat and cool control circuit terminals in the ventilation module connector.
Is the resistance within the specified values?		 0.5-7 Ω Go to Step 15  Go to Step 33 
15 Measure the resistance through the seat cushion temperature sensor from the heat and cool control circuit terminals in the ventilation module connector.
Is the resistance within the specified values?		 500 Ω-10K Ω Go to Step 22  Go to Step 33 
16
  1. Disconnect the seat back heat/cool ventilation blower harness connector.
  2. Measure the resistance through the seat back TED from the heat and cool control circuit terminals in the ventilation blower connector.
Is the resistance within the specified values?		 0.5-7 Ω Go to Step 17  Go to Step 34 
17 Measure the resistance through the seat back temperature sensor from the heat and cool control circuit terminals in the ventilation blower connector.
Is the resistance within the specified values?		 500 Ω-10K Ω Go to Step 23  Go to Step 34 
18
  1. Cycle the ignition OFF and ON.
  2. Using a DMM, measure the voltage between the blower motor control and low reference circuits by back probing the terminals in the seat cushion heat/cool ventilation blower harness connector.
  3. Operate the seat in the high cool mode.
Is the voltage greater than the specified value?		 4 V Go to Step 19  Go to Step 24 
19
  1. Cycle the ignition OFF and ON.
  2. Disconnect the seat cushion heat/cool ventilation blower connector.
  3. Using a DMM, measure the voltage at the blower motor logic voltage circuit terminal in the harness connector.
Is the voltage at or near the specified value?		 12 V Go to Step 33  Go to Step 25 
20
  1. Cycle the ignition OFF and ON.
  2. Using a DMM, measure the voltage between the blower motor control and low reference circuits by back probing the terminals in the seat back heat/cool ventilation blower harness connector
  3. Operate the seat in the high cool mode.
Is the voltage greater than the specified value?		 4 V Go to Step 21  Go to Step 26 
21
  1. Cycle the ignition OFF and ON.
  2. Disconnect the seat back heat/cool ventilation blower connector.
  3. Using a DMM, measure the voltage at the blower motor logic voltage circuit terminal in the harness connector.
Is the voltage at or near the specified value?		 12 V Go to Step 34  Go to Step 27 
22 Test the seat cushion TED control and temperature sensor circuits from the CCSM to the seat cushion ventilation blower connector for opens or shorts to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 39  Go to Step 32 
23 Test the seat back TED control and temperature sensor circuits from the CCSM to the seat back ventilation blower connector for opens or shorts to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 39  Go to Step 32 
24 Test the seat cushion blower control and low reference circuits from the CCSM to the seat cushion ventilation blower connector for opens or shorts to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 39  Go to Step 32 
25 Test the seat cushion blower logic voltage circuit from the CCSM to the seat cushion ventilation blower connector for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 39  Go to Step 32 
26 Test the seat back blower control and low reference circuits from the CCSM to the seat cushion ventilation blower connector for opens or shorts to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 39  Go to Step 32 
27 Test the seat back blower logic voltage circuit from the CCSM to the seat cushion ventilation blower connector for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 39  Go to Step 32 
28 Repair the battery voltage supply circuit to the CCSM for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Is the repair complete?		 - Go to Step 39  -
29 Repair the ignition voltage supply circuit to the CCSM for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Is the repair complete?		 - Go to Step 39  -
30 Repair the CCSM ground circuit for an open or high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Is the repair complete?		 - Go to Step 39  -
31 Inspect for poor connections at the heat/cool seat switch signal converter. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 39  Go to Step 35 
32 Inspect for poor connections at the CCSM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 39  Go to Step 36 
33 Inspect for poor connections at the seat cushion ventilation blower connector. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 39  Go to Step 37 
34 Inspect for poor connections at the seat back ventilation blower connector. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 39  Go to Step 38 
35 Replace the heat/cool seat switch signal converter. Refer to Module Replacement - Ventilation Heat and Cool - Seat Cushion .
Is the repair complete?		 - Go to Step 39  -
36 Replace the CCSM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Is the repair complete?		 - Go to Step 39  -
37 Replace the heat/cool seat cushion ventilation blower. Refer to Blower Replacement - Ventilation Heat and Cool - Front Seat Cushion  or to Blower Replacement - Ventilation Heat and Cool - Rear Seat Cushion .
Is the repair complete?		 - Go to Step 39  -
38 Replace the heat/cool seat back ventilation blower. Refer to Blower Replacement - Ventilation Heat and Cool - Front Seat Back  or to Blower Replacement - Ventilation Heat and Cool - Rear Seat Back .
Is the repair complete?		 - Go to Step 39  -
39 Operate the system in order to verify the repair.
Did you correct the condition?		 - System OK Go to Step 3 
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.