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Home >> Mercury >> 1998 >> Villager LS >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System - 4WAL >> Diagnosis & Testing >> Abs Quick Test

Abs Quick Test

  1. Check for insufficient brake fluid, leaks, damaged sensors, rotors or hydraulic actuator assembly. Check ABS wiring harness for proper connections, pins, corrosion, loose wiring and/or proper routing. Check all fuses. Check ABCM (ABCM) for any physical damage. If components are okay, go to next step. If components are not okay, repair or replace as needed, then go to next step.
  2. Perform all of the following safety steps:
    • Apply parking brake.
    • Place shift lever in Park.
    • Block drive wheels.
    • Turn off all electrical loads (radio, lights, fan, A/C, etc.).

    After performing listed steps, go to next step.

  3. Turn ignition on. Observe ABS warning light. If light comes on for about 3 seconds then goes out, go to next step. If light does not come on at all, go to TEST A  . If light stays on, go to next step.
  4. Start engine. Test drive vehicle if needed to repeat problem. Observe ABS warning light. If warning light comes on, a present failure exists. Go to next step. If warning light does not come on, ABS system is operating properly, or an intermittent problem exists. Problem may also be in non-ABS portion of braking system. Go to next step.
  5. Turn ignition off. Place jumper wire between pin No. 4 of Data Link Connector (DLC) and ground. See Fig 1 . Turn ignition switch to ON position. Observe ABS warning light. Code 12 will flash (start code), then any additional Diagnostic Trouble Codes (DTCs) will be flashed in sequence. Record any codes. If any codes are present, go to DIAGNOSTIC TROUBLE CODE INDEX  . If no codes are retrieved, but warning light stays on, go to TEST D  . If warning light does not come on, go to TEST A  .
    Fig 1: Attaching Jumper Wire To DLC To Retrieve Diagnostic Trouble Codes
    G99B04292Courtesy of FORD MOTOR CO.
NOTE: To identify appropriate test, see DIAGNOSTIC TROUBLE CODE INDEX  table. To identify breakout box pins, see BREAKOUT BOX (BOB) PIN-TO-ECM PIN CHART  . If condition is not corrected at completion of specified test, refer to PRETEST CHECKS  .
DIAGNOSTIC TROUBLE CODE INDEX

Trouble Code Proceed To Test
12 Start Code (No Faults Detected) (1)B 
18 (ABS sensor Frequency Error) E 
21 (RF ABS Sensor) E 
22 (RF ABS Sensor) E 
25 (LF ABS Sensor) E 
26 (LF ABS Sensor) E 
31 (RR ABS Sensor) E 
32 (RR ABS Sensor) E 
35 (LR ABS Sensor) E 
36 (LR ABS Sensor) E 
41 (RF Solenoid) (2)
45 (LF Solenoid) (2)
55 (Rear Solenoid) (2)
61 (Hydraulic Pump Motor Circuit) C 
63 (Solenoid Relay) (2)
71 (ABCM) (3)
No Code, Light On Continuously (Hydraulic Solenoid Circuit) D 
No Code, Light Not On (ABCM Power Supply) A 
(1) Code 12 will be displayed if no other codes are indicated. Proceed to TEST B  .
(2) Code will appear after repair, or if an intermittent fault is present. ABS warning light will stay on (does not blink).
(3) Erase codes and repeat ABS QUICK CHECK. If Code 71 is received again, replace ABCM.
BREAKOUT BOX (BOB) PIN-TO-ECM PIN CHART

ABS Electronic Control Module Pin No. Breakout Box Pin No. Wire Color
1 1 Light Green
2 51 Orange
4 9, 43 Blue/Yellow
5 4 Blue/Green
8 45 White/Blue
9 44 Orange/Blue
11 56 Green
14 24 Blue/Black
17 28 Brown
18 8 Green/Red
20 52 Black
21 16 Red
24 49 Orange
25 2 Yellow
26 25 Black/Pink
27 35 Green/Yellow
28 34 White/Green
29 17 Yellow/Red
30 48 Gray/Blue
32 6 Purple
34 58 Black
35 32 Green/White
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