Subaru Impreza 2003 Service Manual page 2445

DIAGNOSTICS PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
F: DTC 27
— OPEN OR SHORT CIRCUIT IN REAR LEFT ABS WHEEL SPEED SENSOR
CIRCUIT —
DIAGNOSIS:
• Faulty ABS wheel speed sensor (Broken wire, input voltage too high)
• Faulty harness connector
TROUBLE SYMPTOM:
• ABS does not operate.
ABS-105
ABS (DIAGNOSTICS)