Retrieving Codes

NOTE: ALL references to ECM or EBCM in this article are referring to Electronic Brake Control Module.

Remove left kick panel. Ground diagnostic lead and note ANTI-LOCK indicator light operation. See Figure . ANTI-LOCK indicator light will flash if a diagnostic code is stored in ECM memory.
Count number of short flashes starting from long flash. Total number of counts indicates diagnostic code. See Figure .
Long flash will remain on for approximately 1.4 seconds and then go off for .2 second. Diagnostic code then will flash for .2 second and then go off.
NOTE: The long flash may be short because display started with count already in progress. If more than one system failure exists, only first diagnostic code will be retained in ECM memory.
Once diagnostic code is obtained, diagnostic code can be used to determine system failure. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION table. Perform test for proper diagnostic code. See DIAGNOSTIC CODE CHARTS. After repairs, clear diagnostic code. See CLEARING CODES.

DIAGNOSTIC TROUBLE CODE IDENTIFICATION

Diagnostic Trouble Code

System Failure

Open Isolation Valve Circuit Or Malfunctioning ECM

Open Dump Valve Circuit Or Malfunctioning ECM

Closed Anti-Lock Valve Switch

⁽¹⁾ System Operates Dump Valve Excessively

Erratic Speed Sensor Signal

Isolation Valve Output Missing Or Defective Valve Wiring

Dump Valve Output Missing Or Defective Valve Wiring

High Speed Sensor Resistance

Low Speed Sensor Resistance

⁽²⁾ Defective Brakelight Switch Circuit

⁽³⁾ ECM Speed Processor Check

⁽³⁾ ECM Program Check

⁽³⁾ ECM Memory Failure

⁽¹⁾	Failure occurs during normal or hard braking conditions and rear wheels may lock.

⁽²⁾	Condition exists at speeds greater than 35 MPH.

⁽³⁾	Replace ECM if diagnostic code exists, and repeat ABS FUNCTION TEST.