GM Service Manual Online
For 1990-2009 cars only

Object Number: 155211  Size: SF
ABS Components
Antilock Brake System Schematics

Circuit Description

DTC C1286 is an information only DTC. DTC C1286 reflects the status of the command the EBCM/EBTCM issues to illuminate the red BRAKE warning indicator. If another DTC issues a command to illuminate the red BRAKE warning indicator, the EEPROM will store DTC C1286 as a history DTC at the conclusion of the ignition cycle.

Diagnostic Aids

The following ABS mechanical DTCs command the red BRAKE warning indicator to illuminate. The DTCs will also cause EEPROM to store DTC C1286 during shutdown:

    • C1238
    • C1241
    • C1242
    • C1246
    • C1251

If the motors are not in their home position the following electrical DTCs will also command the red BRAKE warning indicator on:

    • C1214
    • C1216
    • C1218
    • C1255
    • C1256
    • C1257
    • C1258
    • C1261
    • C1262
    • C1263
    • C1264
    • C1265
    • C1266
    • C1344
    • C1345

If any of the electrical DTCs are indicated along with DTC C1286, correct the electrical DTCs prior to addressing a DTC C1286 malfunction.

Step

Action

Value(s)

Yes

No

1

Was the Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - ABS

2

  1. Install the scan tool.
  2. Turn the ignition switch to the RUN position, engine off.
  3. Use the scan tool in order to inspect for DTCs.

Are any other DTCs set with DTC C1286 as a current and or History DTC?

--

Go to Diagnostic Trouble Code (DTC) List

Go to Step 3

3

Use the scan tool in order to clear DTC C1286.

Was DTC C1286 cleared?

--

Go to Diagnostic System Check - ABS

Go to Step 4

4

Replace the EBCM/EBTCM.

Is the repair complete?

--

Go to Diagnostic System Check - ABS

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