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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 956 (Entertainment System) >> Diagnostic Information and Procedures >> Steering Wheel Controls Inoperative

Steering Wheel Controls Inoperative

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Steering Wheel Controls Inoperative

Step Action Value(s) Yes No
Schematic Reference: Radio/Audio System Schematics (Base/Uplevel Radio - UQ3/UQ5) Radio/Audio System Schematics (Premium Radio - UQ7 w/o Y91) Radio/Audio System Schematics (Luxury Radio - UQ7 w/Y91) 
1 Did you perform the Diagnostic System Check - Entertainment System? - Go to Step 2  Go to Diagnostic System Check - Entertainment System 
2
  1. Turn ON the ignition, with the engine OFF.
  2. Operate the radio using the steering wheel controls (SWC).
Does the radio operate normally with the steering wheel controls?		 - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3
    CAUTION: Refer to SIR Caution in Cautions and Notices.
  1. Disable the SIR. Refer to SIR Disabling and Enabling Zone 3 in SIR.
  2. Remove the SIR assembly to expose the SWC connector.
  3. Turn ON the ignition, with the engine OFF.
  4. Test the RAP fuse supply voltage circuit of the SWC connector for an open.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 4 
4
  1. Turn OFF the ignition.
  2. Measure the resistance between the RAP fuse supply voltage circuit and the steering wheel controls signal circuit of the SWC connector attached to the SWC switches.
  3. Depress the following steering controls and record the resistance values.
    • Volume Up
    • Volume Down
    • Mute
    • Seek Up
    • Seek Down
    • Preset
Do the recorded values measure near the specified values?		 1270 Ω
294 Ω
823 Ω
715 Ω
1180 Ω
9350 Ω		 Go to Step 5  Go to Step 7 
5
  1. Turn OFF the ignition.
  2. Disconnect the Body Control Module connector with the Steering Wheel Controls circuit.
  3. Test the steering wheel controls signal circuit for a short, high resistance or an open.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 6 
6 Inspect for poor connections at the harness connector of the radio. Refer toTesting for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 9 
7 Inspect for poor connections at the harness connector of the steering wheel radio controls. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 8 
8 Replace the appropriate SWC switch. Refer to Steering Wheel Control Switch Assembly Replacement in Steering Wheel and Column.
Did you complete the replacement?		 - Go to Step 10  -
9
IMPORTANT: The radio must be programmed after replacement. Refer to Service Programming System (SPS) in Programming.
Replace the radio. Refer to Radio Replacement .Did you complete the replacement?		 - Go to Step 10  -
10 Operate the system in order to verify the repair.
Did you correct the condition?		 - System OK Go to Step 2 
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