Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

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

2: This tests the suspension control switch voltage range in various switch positions using a scan tool. Normal switch voltage range is between 0.5-2.5 volts.
3: This tests the suspension control switch signal voltage range using a scan tool with the sensor disconnected. Normal signal voltage range with the sensor disconnected is approximately 5.0 volts.
4: This tests the suspension control switch signal voltage range using a scan tool with the switch jumpered to ground. Normal signal voltage range with the switch jumpered to ground is approximately 0.5 volts.

DTC B3577

Step	Action	Value(s)	Yes	No
Schematic Reference: Suspension Controls Schematics Connector End View Reference: Suspension Controls Connector End Views
1	Did you perform the ESC Diagnostic System Check?	-	Go to Step 2	Go to Diagnostic System Check - Electronic Suspension Control
2	Install a scan tool. Turn ON the ignition, engine OFF. With a scan tool, observe the Suspension Control Select Switch parameter in the ESC data list in the following switch positions: SPORT TOUR Does the scan tool indicate that the Suspension Control Select Switch parameter is within the specified range?	SPORT: 0.5-1.5 V TOUR: 1.5-2.5 V	Go to Diagnostic Aids	Go to Step 3
3	Turn OFF the ignition. Disconnect the suspension control switch. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Suspension Control Select Switch data parameter. Does the scan tool indicate that the Suspension Control Select Switch data parameter is greater than the specified value?	4.5 V	Go to Step 4	Go to Step 5
4	Turn OFF the ignition. Connect a 3 amp fused jumper wire between the signal circuit of the suspension control switch and the ground circuit of the suspension control switch. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Suspension Control Select Switch parameter. Does the scan tool indicate that the Suspension Control Select Switch parameter is less than the specified value?	0.5 V	Go to Step 8	Go to Step 6
5	Test the signal circuit of the suspension control switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 12	Go to Step 9
6	Test the signal circuit of the suspension control switch for a short to voltage, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 12	Go to Step 7
7	Test the ground circuit of the suspension control switch for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 12	Go to Step 9
8	Inspect for poor connections at the harness connector of the suspension control 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 12	Go to Step 10
9	Inspect for poor connections at the harness connector of the ESC 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 12	Go to Step 11
10	Replace the Suspension Control Select switch. Did you complete the replacement?	-	Go to Step 12	-
11	Replace the ESC. Refer to Electronic Suspension Control Module Replacement . Did you complete the replacement?	-	Go to Step 12	-
12	Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset?	-	Go to Step 2	System OK