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Home >> Chevrolet >> 2004 >> Impala SS >> Repair and Diagnosis >> External Pages >> Different car >> Section 545 (Cruise Control System) >> Diagnostic Information and Procedures >> DTC B3794 >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Saturn Sky. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

  1. 2:  This step determines if a condition is present.
DTC B3794

Step Action Values Yes No
Schematic Reference: Cruise Control Schematics 
Connector End View Reference: Master Electrical Component List
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With the scan tool, observe the Cruise Control Switch parameter in the body control module (BCM) data list.
Does the Cruise Control Switch parameter display Error?		 - Go to Step 3  Go to Step 4 
3
  1. Turn OFF the ignition.
  2. Remove the inflatable steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
  3. Disconnect the cruise control switch.
  4. Turn ON the ignition, with the engine OFF.
  5. With the scan tool, observe the Cruise Control Switch parameter in the BCM data list.
Does the Cruise Control Switch parameter display Error?		 - Go to Step 9  Go to Step 11 
4
  1. Turn the cruise On/Off control switch ON.
  2. With the scan tool, observe the Cruise Control Switch parameter in the body control module (BCM) data list.
Does the Cruise Control Switch parameter display Error?		 - Go to Step 7  Go to Step 5 
5
  1. Activate the cruise control set/coast switch.
  2. With the scan tool, observe the Cruise Control Switch parameter in the body control module (BCM) data list.
Does the Cruise Control Switch parameter display Error?		 - Go to Step 7  Go to Step 6 
6
  1. Activate the cruise control resume/accelerate switch.
  2. With the scan tool, observe the Cruise Control Switch parameter in the body control module (BCM) data list.
Does the Cruise Control Switch parameter display Error?		 - Go to Step 7  Go to Diagnostic Aids
7
IMPORTANT: The cruise control On/Off switch must be turned ON in order to correctly view the set/coast switch and the resume/accelerate switch resistance values with the DMM.
  1. Turn OFF the ignition.
  2. Remove the inflatable steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
  3. Disconnect the cruise control switch.
  4. With a DMM, measure the resistance of the cruise control switch between the ignition 1 voltage circuit and the cruise control set/coast and resume/accelerate switch signal circuit.
  5. Individually activate and hold the cruise control function switches while measuring the resistance value of each cruise control function switch.
Do the cruise control function switch resistance values measure between the specified values?		 Off = O.L.
On = 7.8 K-8.6 K
Resume = 2.7 K-3.0 K
Set = 1.2 K-1.3 K		 Go to Step 8  Go to Step 11 
8 Test the ignition 1 voltage circuit for a high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 10 
9 Test the cruise control set/coast and resume/accelerate switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
10 Test the cruise control set/coast and resume/accelerate switch signal circuit for a high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
11 Inspect for poor connections at the harness connector of the cruise control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 13 
12 Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
13 Replace the cruise control switch. Refer to Steering Wheel Control Switch Assembly Replacement .
Did you complete the replacement?		 - Go to Step 15  -
14 Replace the BCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 15  -
15
  1. Install the inflatable steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
  2. Enable the inflatable restraint steering wheel module. Refer to Sir Disabling And Enabling .
  3. Use the scan tool in order to clear the DTCs.
  4. Operate the vehicle within the Conditions for Running the DTC.
Does the DTC reset?		 - Go to Step 2  System OK
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