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 for DTC C0043:

Poor terminal contact at terminal 15
Terminal 15 ground circuit high resistance
Terminal 15 ground circuit open
BPMV pump motor malfunction
EBCM malfunction

DTC C0043

Step	Action	Values	Yes	No
1	Did you perform the Diagnostic System Check-ABS?	-	Go to Step 2	Go to Diagnostic System Check - ABS
2	Turn the ignition switch OFF. Disconnect the negative battery cable. Connect an ohmmeter to the negative battery cable and terminal 15 of the EBCM harness. Was the resistance reading less than the specified value?	2 Ω	Go to Step 4	Go to Step 3
3	Find and repair the source of high resistance between the EBCM ground circuit and the chassis ground. Did you find and correct the condition?	-	System OK	-
4	Follow the negative battery cable to the engine block and/or chassis ground connection and inspect for a good clean and tight connection. From terminal 15 of the EBCM harness follow the wire and find the location where the circuit grounds to the chassis. Inspect for a good clean and tight connection. Were both connections clean and tight?	-	Go to Step 6	Go to Step 5
5	Repair the poor ground connection. Did you find and correct the condition?	-	System OK	-
6	The EBCM harness is still disconnected. Remove the EBCM from the BPMV. Inspect the EBCM to BPMV connector for conditions such as damage, corrosion, poor terminal contact, or the presence of brake fluid. Were the terminals and connector OK, and the cavity free of brake fluid, damage, and corrosion?	-	Go to Step 8	Go to Step 7
7	If damage and/or corrosion are present, replace the EBCM and/or the BPMV as necessary. Refer to Brake Modulator Assembly Replacement (Delphi) or Brake Modulator Assembly Replacement (Mando) . If the brake fluid is present, replace both the EBCM and the BPMV. Refer to Brake Modulator Assembly Replacement (Delphi) or Brake Modulator Assembly Replacement (Mando) . Did you complete the replacement?	-	System OK	System OK
8	Connect an ohmmeter to terminal 1 and terminal 2 of the BPMV. Was the pump motor resistance reading less than the specified value?	2 Ω	Go to Step 10	Go to Step 9
9	Replace the brake pressure modulator valve. Refer to Brake Modulator Assembly Replacement (Delphi) or Brake Modulator Assembly Replacement (Mando) . Did you complete the replacement?	-	System OK	-
10	Replace the EBCM. Refer to Brake Modulator Assembly Replacement (Delphi) or Brake Modulator Assembly Replacement (Mando) . Did you complete the replacement?	-	System OK	-