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PB-122 < DTC/CIRCUIT DIAGNOSIS > U0401 ECM SIGNAL U0401 ECM SIGNAL DTC Description INFOID:0000000010833707 DTC DETECTION LOGIC POSSIBLE CAUSE • ECM FAIL-SAFE Automatic apply and release are prohibited. DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn the ignition switch OFF >> GO TO 2. 2. CHECK DTC DETECTION With CONSULT 1. Turn the ignition switch OFF to ON. CAUTION: Be sure to wait for 10 seconds after turning ignition switch OFF or ON. 2. Push the parking brake switch. CAUTION: • Set the select lever in the P position. 3. Pull the parking brake switch. 4. Perform self-diagnosis for “EHS/PKB”. Is DTC “U0401” detected? YES >> Proceed to NO-1 >> To check malfunction symptom before repair: Refer to GI-44, "Intermittent Incident" . NO-2 >> Confirmation after repair: INSPECTION END Diagnosis Procedure INFOID:0000000010833708 1. ERFORM SELF-DIAGNOSIS (1) With CONSULT Perform self-diagnosis for “ENGINE”. Is DTC detected? YES >> Check the DTC. NO >> GO TO 2. 2. PERFORM SELF-DIAGNOSIS (2) With CONSULT 1. Turn the ignition switch OFF to ON. CAUTION: Be sure to wait for 10 seconds or more after turning the ignition switch OFF. 2. Erase self-diagnosis result for “EHS/PKB”. 3. Repeat the parking brake switch operation (pull and push) five times. DTC Display Item (Trouble diagnosis content) Malfunction detected condition U0401 VCM When a malfunction is detected in ECM system. |