Abs Warning Lamp Comes On Steady: Troubleshooting

TROUBLESHOOTING STEPS

Step	Action	YES	NO
1	Perform diagnostic trouble code check. Is there any DTC(s)?	Go to applicable DTC diagnostic flow chart.	Go to Step 2.
2	Are main fuses for ABS pump motor and ABS solenoid in good condition?	Go to Step 3.	Replace fuse and check circuit for short to ground.
3	Turn ignition switch to OFF. Disconnect ABS (ESP®) control module connector. Check for proper connection to ABS (ESP®) control module connector at terminals "E03 - 7", "E03-13" and "E03-26" (or "E35-16", "E53-35" and "E53-47"). If OK then turn ignition switch to ON position and measure voltage between terminal "E03 - 7" (or "E53-35") and vehicle body ground. Is it 10 - 14 V?	Go to Step 4.	"GRN/ORN" circuit open.
4	Turn ignition switch to OFF position. Check for proper connection to ABS (ESP®) control module connector at terminals "E03 - 1" and "E03-14" (or "E53-1" and "E53-32"). If OK then turn ignition switch to ON position and measure voltage between each terminal of "E03-1", "E03-14" (or "E53-1", "E53-32") and vehicle body ground. Are they 10 - 14 V?	Go to Step 5.	"WHT/RED" and/or "WHT/BLU" circuit open.
5	Turn ignition switch to OFF and measure resistance between each terminal of "E03- 13", "E03-26" (or "E-53-1", "E53-32") and vehicle body ground. Is resistance less than 2 O?	Go to Step 6.	Ground circuit for ABS (ESP®) hydraulic unit/control module open or high resistance.
6	Check CAN communication circuit between combination meter and ABS (ESP®) control module referring to DTC U1073: CONTROL MODULE COMMUNICATION BUS OFF . Is CAN communication circuit in good condition?	Substitute a known-good combination meter and recheck. If ABS warning lamp remains ON, substitute a known-good ABS (ESP®) hydraulic unit/control module assembly and recheck.	Repair or replace.