GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Spark 🢒 Brakes 🢒 Antilock Brake System 🢒 DTC 1610

Circuit Description

When the brake pedal is pressed, the contacts on the brake light switch close to illuminate the brake lights. Battery voltage is also applied to terminal 24 of the electronic brake control module (EBCM), which signals the antilock brake system (ABS) controller that the brakes are applied and ABS may be needed.

Conditions for Running the DTC

When the EBCM senses the fast deceleration signal through the wheel speed sensor but is not input the stoplamp switch operation signal, the historic fault code is input to the EBCM.

Conditions for Setting the DTC

The stoplamp switch circuit is open.

Action Taken When the DTC Sets

The ABS warning lamp is OFF.

The ABS is operative and the ABS warning lamp is turned OFF. The proportioning is operation.

Step

Action

Values

Yes

No

Schematic Reference: Antilock Brake System Schematics

Connector End View Reference: Antilock Brake System Connector End Views

1
  1. Turn the ignition switch to OFF.
  2. Disconnect the EBCM harness connector.
  3. Turn the ignition switch to ON.
  4. Connect a test light between terminal 24 of the EBCM connector and ground.
  5. Apply firm pressure to the brake pedal and observe the test light.

Is the test light on?

--

Go to Step 2

Go to Step 4

2
  1. Turn the ignition switch to OFF.
  2. Connect the EBCM harness connector.
  3. Monitor the stoplamp switch status from the ABS Data List on the scan tool.
  4. Turn the ignition switch to ON.
  5. Apply light pressure to the brake pedal while monitoring the stoplamp switch status on the scan tool.

Does the scan tool indicate the stoplamp switch is ON?

--

System OK

Go to Step 3

3

Replace the EBCM.

Is the repair complete?

--

System OK

--

4
  1. Remove the fuse Ef2 in the engine fuse block.
  2. Check for an open in fuse Ef2.

Is the fuse OK?

--

Go to Step 6

Go to Step 5

5

Replace the fuse Ef2.

Is the repair complete?

--

System OK

--

6
  1. Remove the fuse F5 in the I/P fuse block.
  2. Check for an open in fuse F5.

Is the fuse OK?

--

Go to Step 8

Go to Step 7

7

Replace the fuse F5.

Is the repair complete?

--

System OK

--

8

Check for a poor connection at terminal 2 of the connector C207.

Is the connection OK?

--

Go to Step 10

Go to Step 9

9

Repair the poor connection at terminal 2 of the connector C207.

Is the repair complete?

--

System OK

--

10
  1. Disconnect the stoplamp switch connector.
  2. Use a digital voltmeter (DVM) to measure the voltage between ground and terminal 2 of the stoplamp switch connector.

Is the voltage within the specified value?

10.5-13.5 V

Go to Step 12

Go to Step 11

11

Repair the open or short to ground between battery voltage and terminal 2 of the stoplamp switch connector.

Is the repair complete?

--

System OK

--

12
  1. Connect the stoplamp switch connector.
  2. Connect the test light between terminal 2 of the stoplamp switch connector and ground.
  3. Apply firm pressure to the brake pedal and observe the test light.

Is the test light on?

--

Go to Step 14

Go to Step 13

13

Replace the stoplamp switch.

Is the repair complete?

--

System OK

--

14
  1. Disconnect the connector C205.
  2. Connect the test light between terminal 15 of the connector C205 and ground.
  3. Apply firm pressure to the brake pedal and observe the test light.

Is the test light on?

--

Go to Step 15

Go to Step 16

15
  1. Connect the test light between terminal 24 of the EBCM connector and ground.
  2. Apply firm pressure to the brake pedal and observe the test light.

Is the test light on?

--

System OK

Go to Step 16

16

Repair the open between terminal 1 of the stoplamp switch connector and terminal 24 of the EBCM connector.

Is the repair complete?

--

System OK

--