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For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2000 🢒 Grand Am 🢒 Brakes 🢒 Antilock Brake System 🢒 DTC C1214 Brake Control Relay Contact Circuit Open

Object Number: 255756 Size: SF
ABS Components
Antilock Brake System Schematics
Handling ESD Sensitive Parts Notice

Circuit Description

Ignition voltage is supplied to terminal 86 of the Electronic Brake Control Relay. The above condition enables the EBCM to energize the pull in coil by completing the ground circuit at connector terminal 2 of the EBCM. The magnetic field created closes the Electronic Brake Control Relay contacts. The magnetic field also allows battery voltage and current through the Electronic Brake Control Relay terminal 30 to be supplied to the EBCM through connector C1 terminal B3. Connector C1 terminal B3 supplies power to the EBCM, which supplies power to the motors and solenoids.

Conditions for Setting the DTC

DTC C1214 can set anytime after the EBCM commands the Electronic Brake Control Relay ON. The command occurs during the three second bulb check.

DTC C1214 monitors the availability of current/voltage to the motors and solenoids.

The above malfunction indicates voltage is not available. The malfunction will not allow ABS operation.

Action Taken When the DTC Sets
    • A malfunction DTC stores.
    • ABS is disabled.
    • The amber ABS warning indicator is turned ON.

Conditions for Clearing the DTC
    • The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTCs function is used.
    • 100 drive cycles pass with no DTCs detected. A drive cycle consists of starting the vehicle, driving the vehicle over 16 km/h (10 mph), stopping and then turning the ignition OFF.

Diagnostic Aids

The following conditions may cause an intermittent malfunction:

    • A poor connection
    • Rubbed-through wire insulation
    • A broken wire inside the insulation

Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction.

Thoroughly inspect any circuitry that may be causing the intermittent complaint for the following conditions:

    • Backed out terminals
    • Improper mating
    • Improperly formed or damaged terminals
    • Poor terminal-to-wiring connections
    • Physical damage to the wiring harness

Vibration and Temperature Effects
    • Use the following procedure in order to inspect for vibration effects by performing the Relay Test function of the Scan Tool:
        1. With the Relay Test commanded on, lightly tap the top and sides of the Electronic Brake Control Relay while monitoring the Electronic Brake Control Relay voltage.
        2. If the Electronic Brake Control Relay voltage changes significantly, replace the Electronic Brake Control Relay.
    • If DTC C1214 only sets when the vehicle is initially started in cold ambient conditions (temperature less than 0°C (32°F)), replace the Electronic Brake Control Relay.

Test Description

  1. This test checks to see if the EBCM is sensing battery voltage at terminal C.

    2.

  2. This test checks for proper operation of the electronic brake control relay and related circuitry.

    3.

  3. This test checks for excessive resistance in the switched battery input circuitry.

    4.

  4. This test checks for excessive resistance in the battery feed circuit.

    5.

  5. This test checks for excessive resistance in the ABS relay contacts.

    6.

  6. This test determines if the malfunction is caused by poor terminal contact.

    7.

  7. This test determines if the malfunction is caused by the EBCM.

    8.

  8. This test checks for excessive resistance in the electronic brake control relay control circuitry.

    9.

  9. This test checks for proper battery voltage.

    10.

  10. This test checks for an open in the battery feed circuit.

    11.

  11. This test checks for an open in the switched battery input circuit.

    12.

  12. This test checks for excessive resistance in the electronic brake control relay coil.

    13.

  13. This test checks for excessive resistance in the electronic brake control relay control circuit between the relay and the EBCM.

Step

Action

Value(s)

Yes

No

Important: Zero the J 39200 test leads before making any resistance measurements. Refer to the J 39200 user's manual.

1

Was the ABS Diagnostic System Check performed?

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Go to Step 2

Go to Diagnostic System Check - ABS

2
  1. Turn the ignition switch to the OFF position.
  2. Install a Scan Tool .
  3. Turn the ignition switch to the ON position.

    4. Do not start the engine.

    Use the Scan Tool in order to read the DTCs.

Is DTC C1216 present (either as a current DTC or a history DTC)?

--

Go to DTC C1216 Brake Control Relay Coil Circuit Open

Go to Step 3

3

  1. Select Data Display on the Scan Tool .
  2. Select ABS Data.
  3. Select and observe Battery Voltage.

Is the voltage equal to or greater than the specified voltage?

10 V

Go to Step 25

Go to Step 4

4

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the EBCM connector.
  3. Connect a fused jumper wire (such as a J 36169-A ) with a 3A fuse between the EBCM harness connector terminal 2 and ground.
  4. Turn the ignition switch to the ON position.

    5. Do not start the engine.

  5. Use the J 39200 in order to measure the voltage between the EBCM harness connector terminal C and ground.

Is the voltage equal to or greater than the specified voltage?

10 V

Go to Step 5

Go to Step 10

5

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the fused wire jumper.
  3. Disconnect the Electronic Brake Control Relay.
  4. Use the J 39200 with the J 35616 in order to measure the resistance between the Electronic Brake Control Relay connector terminal 87 and the EBCM harness connector terminal C.

Is the resistance within the specified range?

0-2 ohms

Go to Step 6

Go to Step 19

6

  1. Disconnect the negative battery cable.
  2. Disconnect the positive battery cable.
  3. Use the J 39200 in order to measure the resistance between the positive battery cable terminal and the Electronic Brake Control Relay connector terminal 30.

Is the resistance within the specified range?

0-2 ohms

Go to Step 7

Go to Step 20

7

  1. Connect a jumper wire between the Electronic Brake Control Relay connector terminal 86 to ground.
  2. Connect a fused jumper wire (such as a J 36169-A ) with a 3A fuse between the Electronic Brake Control Relay terminal 85 and battery voltage.
  3. Use the J 39200 in order to measure the resistance between the Electronic Brake Control Relay terminal 30 and terminal 87.

Is the resistance within the specified range?

0-2 ohms

Go to Step 8

Go to Step 22

8

  1. Turn the ignition switch to the OFF position.
  2. Inspect the following components:
    3. • The EBCM connector
    • The EBCM harness connector
    • The Electronic Brake Control Relay
    • The Electronic Brake Control Relay connector
  3. Inspect the above components for signs of the following conditions:
    4. • Damage
    • Poor terminal contact
    • Terminal corrosion
  4. Inspect the following components:
    5. • The positive battery terminal
    • The positive battery cable terminal
    • The negative battery terminal
    • The negative battery cable terminal
  5. Inspect the above components for signs of the following conditions:
    6. • A poor connection
    • A poor terminal contact

Are there signs of poor terminal contact, corrosion, or damaged terminal(s)?

--

Go to Step 17

Go to Step 9

9

  1. Remove all of the jumpers.
  2. Reconnect the EBCM connector.
  3. Reconnect the Electronic Brake Control Relay
  4. Reconnect the positive battery cable.
  5. Reconnect the negative battery cable.
  6. Turn the ignition switch to the ON position.

    7. Do not start the engine.

  7. Use the Scan Tool in order to look for current DTCs.

Does DTC C1214 set as a current DTC?

--

Go to Step 24

Go to Step 25

10

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the negative battery cable.
  3. Disconnect the positive battery cable.
  4. Turn the ignition switch to the ON position.

    5. (This action completes the ignition circuit to the Electronic Brake Control Relay.)

  5. Use the J 39200 with the J 35616 in order to measure the resistance between the EBCM harness connector terminal 2 and the positive battery cable terminal.

Is the resistance within the specified range?

60-95 ohms

Go to Step 11

Go to Step 14

11

Use the J 39200 in order to measure the voltage between the positive battery terminal and the negative battery terminal.

Is the voltage equal to or greater than the specified voltage?

10 V

Go to Step 12

Go to Step 23

12

  1. Turn the ignition switch to the OFF position.
  2. Reconnect the positive battery cable.
  3. Reconnect the negative battery cable.
  4. Disconnect the Electronic Brake Control Relay.
  5. Use the J 39200 with the J 35616 in order to measure the voltage between the Electronic Brake Control Relay connector terminal 30 and ground.

Is the voltage equal to or greater than the specified voltage?

10 V

Go to Step 13

Go to Step 20

13

Use the J 39200 with the J 35616 in order to measure the voltage between the Electronic Brake Control Relay connector terminal 87 and the EBCM harness connector terminal C.

Is the resistance within the specified range?

0-2 ohms

Go to Step 7

Go to Step 19

14

  1. Disconnect the Electronic Brake Control Relay.
  2. Use the J 39200 with the J 35616 in order to measure the resistance between the Electronic Brake Control Relay terminal 86 and the Electronic Brake Control Relay terminal 85.

Is the resistance within the specified range?

60-95 ohms

Go to Step 15

Go to Step 22

15

Use the J 39200 with the J 35616 in order to measure the resistance between the Electronic Brake Control Relay connector terminal 85 and the EBCM harness connector terminal 2.

Is the resistance within the specified range?

0-2 ohms

Go to Step 16

Go to Step 18

16

Use the J 39200 with the J 35616 in order to measure the resistance between the Electronic Brake Control Relay connector terminal 86 and the positive battery cable terminal.

Is the resistance within the specified range?

0-2 ohms

Go to Step 8

Go to Step 21

17

Replace all of the terminals and the connectors that exhibit signs of poor terminal contact, corrosion, or damaged terminal(s).

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

18

Repair the open or high resistance in CKT 1632.

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

19

Repair the open or high resistance in CKT 1633.

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

20

Repair the open or high resistance in CKT 342.

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

21

Repair the open or high resistance in the following components as necessary:

    • CKT 139
    • CKT 3
    • The ignition switch
    • The battery feed CKT 242 to the ignition switch

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

22

Replace the Electronic Brake Control Relay. Refer to Electronic Brake Control Relay Replacement .

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

23

Repair the low voltage condition.

Refer to Charging System Check in Engine Electrical.

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

24

Replace the EBCM. Refer to Electronic Brake Control Module Replacement .

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

25

The malfunction is intermittent or is not present at this time.

Refer to Diagnostic Aids for more information.

Is the action complete?

--

System OK

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