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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1540 (Hydraulic Brake System) >> Diagnostic Information and Procedures >> DTC C1247 >> Diagnostic Aids

Diagnostic Aids

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Inspect the master cylinder reservoir for the proper brake fluid level.

DTC C1247

Step Action Yes No
Schematic Reference:  Brake Warning System Schematics  
Connector End View Reference:  Hydraulic Brakes Connector End Views   or  Instrument Panel, Gages, and Console Connector End Views 
1 Did you perform the Hydraulic Brake Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Hydraulic Brakes 
2 Inspect the brake fluid level.
Is the brake fluid level OK?		 Go to Step 3  Go to Brake Fluid Loss 
3
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Brake Fluid Level parameter in the Instrument Panel Cluster data list.
Does the scan tool indicate that the Brake Fluid Level parameter is OK?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 4 
4
  1. Turn OFF the ignition.
  2. Disconnect the brake fluid level switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Brake Fluid Level parameter.
Does the scan tool indicate that the Brake Fluid Level parameter is OK?		 Go to Step 6  Go to Step 5 
5 Test the signal circuit of the brake fluid level 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 10  Go to Step 7 
6 Inspect for poor connections at the harness connector of the brake fluid level 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 10  Go to Step 8 
7 Inspect for poor connections at the harness connector of the instrument cluster (IPC). 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 10  Go to Step 9 
8 Replace the brake fluid level switch. Refer to Master Cylinder Fluid Level Sensor Replacement .
Did you complete the repair?		 Go to Step 10  -
9 Replace the instrument cluster (IPC). Refer to Instrument Panel Cluster (IPC) Replacement in Instrument Panel, Gauges and Console.
Did you complete the repair?		 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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