How to Troubleshoot the ABS

ABS Indicator



To determine the actual cause of the problem, question the customer about the problem, taking the above conditions into consideration.

Diagnostic Trouble Code (DTC)



Self-diagnosis



Kickback


The pump motor operates when the ABS is functioning, and the fluid in the reservoir is forced out to the master cylinder, causing kickback at the brake pedal.

Pump Motor


How to Troubleshoot ABS DTCs


The troubleshooting flowchart procedures assume that the cause of the problem is still present and the ABS indicator is still on. Following the flowchart when the ABS indicator does not come on can result in incorrect diagnosis.
The connector illustrations show the female terminal connectors with a single outline and the male terminal connectors with a double outline.

1.Question the customer about the conditions when the problem occured, and try to reproduce the same conditions for troubleshooting. Find out when the ABS indicator came on, such as during ABS control, after ABS control, when the vehicle was at a certain speed, etc.

2.When the ABS indicator does not come on during the test-drive, but troubleshooting is done based on the DTC, check for loose connectors, poor terminal contact, etc., before you start troubleshooting.

3.After troubleshooting, clear the DTC and test-drive the vehicle. Be sure the ABS indicator does not come on.

How to Retrieve ABS DTCs


Honda PGM Tester Method:

1.With the ignition switch OFF, connect the Honda PGM Tester (A) to the 16P Data Link Connector (DLC) (B) right side of the under-dash fuse/relay box.

 

2.Turn the ignition switch ON (II), and follow the prompts on the PGM Tester to display the DTC (s) on the screen. After determining the DTC, refer to the DTC Troubleshooting Index.

NOTE: See the Honda PGM Tester user's manual for specific instructions.

SCS Short Connector Method (EU Model):


1.With the ignition switch OFF, connect the SCS short connector (A) to the service check connector (2P) (B) right side of the under-dash fuse/relay box.

 

2.Turn the ignition switch ON (II) without pressing the brake pedal.

NOTE: If you press the brake pedal when turning the ignition switch ON (II), the system shifts to the DTC clearing mode.

3.The blinking frequency indicates the DTC. DTCs are indicated by a series of long and short blinks. One long blink equals 10 short blinks. Add the long and short blinks together to determine the DTC. After determining the DTC, refer to the DTC Troubleshooting Index.

NOTE:


The system will not indicate the DTC unless these conditions are met:

  • The ignition switch is turned ON (II).
  • The SCS circuit is shorted to body ground before the ignition switch is turned ON (II).

 

4.Turn the ignition switch OFF.

5.Disconnect the SCS short connector from the service check connector.

DLC Pin Box Method (Except EU Model):

1.With the ignition switch OFF, connect the DLC pin box (A) to the 16P Data Link Connector (DLC) (B) right side of the under-dash fuse/relay box..

 

2.Insert the plugs of the jumper wire (C) to No. 4 and No. 9 plug holes of the DLC terminal box, then push the switch.

3.Turn the ignition switch ON (II) without pressing the brake pedal.

NOTE: If you press the brake pedal when turning the ignition switch ON (II), the system shifts to the DTC clearing mode.

4.The blinking frequency indicates the DTC. DTCs are indicated by a series of long and short blinks. One long blink equals 10 short blinks. Add the long and short blinks together to determine the DTC. After determining the DTC, refer to the DTC Troubleshooting Index.

NOTE:


The system will not indicate the DTC unless these conditions are met:

  • The brake pedal is not pressed.
  • The ignition switch is turned ON (II).
  • The SCS circuit is shorted to body ground before the ignition switch is turned ON (II).

 


5.Turn the ignition switch OFF.

6.Disconnect the DLC pin box from the DLC.

How to Clear ABS DTCs


Honda PGM Tester Method:

1.With the ignition switch OFF, connect the Honda PGM Tester (A) to the 16P Data Link Connector (DLC) (B) under the driver's side of the dashboard.

 

2.Turn the ignition switch ON (II), and clear the DTC(s) by following the screen prompts on the PGM Tester.

NOTE: See the Honda PGM Tester user's manual for specific instructions.

SCS Short Connector Method (Except EU Model):

1.With the ignition switch OFF, connect the SCS short connector (A) to the service check connector (2P) (B) right side of the under-dash fuse/relay box.

 

2.Press the brake pedal.

3.Turn the ignition switch ON (II) while continuing to press the brake pedal.

4.After the ABS indicator goes off, release the brake pedal.

5.After the ABS indicator comes on, press the brake pedal again.

6.After the ABS indicator goes off, release the brake pedal.

You cannot clear the DTC unless these conditons are met:

  • The vehicle speed is 6 mph (10 km/h) or less.
  • The SCS circuit is shorted to body ground before the ignition switch is turned ON (II).
  • The brake pedal is press before the ignition switch is turned ON (II).

7.After a few seconds, the ABS indicator blinks twice and the DTC is cleared. If the indicator does not blink twice, repeat steps 1 thru 6. If the ABS indicator stays on after it blinks twice, check the DTC, because a problem was detected during initial diagnosis before shifting to DTC clearing mode.

8.Turn the ignition switch OFF.

9.Disconnect the SCS short connector from the service check connector.

DLC pin Box Method (Except EU Model):

1.With the ignition switch OFF, connect the DLC pin box (A) to the 16P Data Link Connector (DLC) (B) right side of the under-dash fuse/relay box.

 

2.Insert the plugs of the jumper wire (C) to No. 4 and No. 9 plug holes of the DLC pin box, then push the switch.

3.Press the brake pedal.

4.Turn the ignition switch ON (II) while continuing to press the brake pedal.

5.After the ABS indicator goes off, release the brake pedal.

6.After the ABS indicator comes on, press the brake pedal again.

7.After the ABS indicator goes off, release the brake pedal.

You cannot clear the DTC unless these conditions are met:

  • The vehicle speed is 6 mph (10 km/h) or less.
  • The SCS circuit is shorted to body ground before the ignition switch is turned ON (II).
  • The brake pedal is pressed before the ignition switch is turned ON (II).

8.After a few seconds, the ABS indicator blinks twice and the DTC is cleared. If the indicator does not blink twice, repeat steps 1 thru 7. If the ABS indicator stays on after it blinks twice, check the DTC, because a problem was detected during initial diagnosis before shifting to DTC clearing mode.

9.Turn the ignition switch OFF.

10.Disconnect the DLC pin box from the DLC.