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Home >> Chevrolet >> 2005 >> Aveo Base, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Antilock Brake System) >> Diagnostic Information and Procedures >> ABS Indicator Always On (Mando) >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

Typical causes of the ABS warning lamp ON with no DTCs set:

ABS Indicator Always On (Mando)

Step Action Value(s) Yes No
1 Did you perform a Diagnostic System Check - ABS? - Go to Step 2  Go to Diagnostic System Check - ABS 
2
  1. Turn the ignition switch OFF.
  2. Disconnect the electronic brake control module (EBCM) harness from the EBCM.
  3. Turn ON the ignition, with the engine OFF.
  4. Connect a fused jumper wire between terminal 23 of the EBCM harness and body ground.
Did the amber ABS lamp turn OFF?		 - Go to Step 3  Go to Step 4 
3 Replace the EBCM. Refer to Brake Modulator Assembly Replacement (Delphi)  or Brake Modulator Assembly Replacement (Mando) .
Did you completer the replacement?		 - System OK -
4
  1. Turn the ignition switch OFF.
  2. Remove the cluster assembly from the instrument panel (I/P).
  3. Disconnect the white cluster harness connector from the cluster assembly.
  4. Disconnect the lamp driver module (LDM) harness connector from the LDM.
  5. Connect an ohmmeter to cluster harness terminal 4 and then to body ground.
Was the resistance within the specific value?		 OL (open circuit) Go to Step 6  Go to Step 5 
5 Find and repair the short to ground between the cluster harness and the LDM harness.
Did you find and complete the repair?		 - System OK -
6
  1. Turn the ignition switch OFF.
  2. Disconnect the EBCM harness from the EBCM.
  3. Disconnect the LDM harness from the LDM.
  4. Connect an ohmmeter to terminal D of the LDM harness and then to EBCM harness terminal 16.
Was the resistance measured less than the specific value?		 2 Ω Go to Step 8  Go to Step 7 
7 Repair the open or high resistance between the LDM and the EBCM.
Did you find and correct the condition?		 - System OK -
8 Replace the LDM.
Did you complete the replacement?		 - System OK -
9 Replace the cluster assembly. Refer to Instrument Panel Cluster (IPC) Replacement in Instrument Panel, Gages, and Console.
Did you complete the replacement?		 - System OK -
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