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Inspection & Verification

  1. Verify customer concern by operating vehicle and applying brakes under different conditions to attempt to duplicate problem. Inspect following first to eliminate any mechanical or electrical problem first:
    • Parking Brake Cable
    • Improperly Inflated Tires
    • Mismatched Wheels Or Tires
    • ABS Fuse (50-Amp) in Power Distribution Box
    • Fuse No. 15 (10-Amp) in Fuse Junction Panel
    • Damaged Or Disconnected Connectors
  2. If fault is not visually evident, connect New Generation Star (NGS) tester (007-00500) to Data Link Connector (DLC) beneath instrument panel. Select vehicle to be tested from NGS menu. If there is no communications with vehicle, check for proper program card and installation, connection to DLC and ignition switch in proper position.
  3. If NGS still does not communicate with vehicle, refer to tester manual.
  4. If communications exists, perform DATA LINK DIAGNOSTIC TEST on NGS menu. If NGS responds with CKT914, CKT915, or CKT70=ALL ECUS NO RESP/NOT EQUIP, see appropriate MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT. If NGS responds with NO RESP/NOT EQUIP FOR ABCM, go to TEST A . If NGS responds with SYSTEM PASSED, retrieve and record continuous Diagnostic Trouble Codes (DTC) and perform self-test diagnostics for ABCM.
  5. If retrieved DTCs are related to ABS concern, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are related to concern, go to symptom chart. See Fig 1.
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC (1) (Affected Circuit) Proceed To Test
No Communication With ABCM A 
B1342 (ABCM) (2)
B1484 & B1485 (Brake Pedal Position Switch) F 
B1676 (Battery Voltage) G 
C1095 (Hydraulic Pump Motor Circuit) C 
C1145 (RF Wheel Speed Input Circuit) D 
C1155 (LF Wheel Speed Input Circuit) D 
C1165 (RR Wheel Speed Input Circuit) D 
C1175 (LR Wheel Speed Input Circuit) D 
C1222 (Mismatched Wheels Or Damaged Tone Ring) (3)
C1233 & C1296 (No LF Wheel Speed Signal) E 
C1234 & C1297 (No RF Wheel Speed Signal) E 
C1235 & C1298 (No RR Wheel Speed Signal) E 
C1236 & C1299 (No LR Wheel Speed Signal) E 
C1266 (ABS Valve Power Relay Circuit Failure) (4)
C1805 (PCM And ABS/TC Modules Do Not Match) (5)
U1009 (SCP Invalid Or Missing Torque Data) (6)
U1027 (SCP Invalid Or Missing RPM Data) (6)
U1041 (SCP Invalid Or Missing Speed Data) (7)
U1043 (SCP Invalid Or Missing Traction Data) (8)
U1059 (SCP Invalid Or Missing Trans. Data) (6)
U1123 (SCP Invalid Or Missing Odometer Data) (8)
U1262 (SCP Invalid Or Missing Traction Control Data) (8)
(1) If DTCs not listed in table are present, check Powertrain Control Module (PCM) for stored codes and service as necessary.
(2) Replace ABCM.
(3) Make sure the tires are the same size and correctly inflated. Inspect tone rings.
(4) Install a new Hydraulic Control Unit (HCU). Repeat the self test.
(5) Check the part numbers. Install the correct module.
(6) Carry out PCM Self-Test.
(7) Carry out Hybrid Electronic Cluster (HEC) Self-Test. It may also be necessary to test EATC, air suspension, speed control and other speed-reactive systems.
(8) Carry out Hybrid Electronic Cluster (HEC) Self-Test.
Fig 1: ABS Symptom Chart
G99E04298Courtesy of FORD MOTOR CO.
Fig 2: Identifying 25-Pin ABCM Connector Terminals
G99I04295Courtesy of FORD MOTOR CO.
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