Dtc Description

DTC Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

Confirm if DTC is PAST or CRNT. If DTC is CRNT, proceed with Diagnosis Procedure. If DTC is PAST, clear DTC. Do not replace the ABS actuator and electric unit (control unit) for a PAST DTC.

FAIL-SAFE

The following functions are suspended:

• Brake assist function

Confirmation Procedure

Confirmation Procedure

1. PRECONDITIONING

   1. If “Confirmation Procedure” has been previously conducted, always place the ignition switch in the OFF position and wait at least 10 seconds before conducting the next test.

   >>

   GO TO 2.

2. CHECK DTC DETECTION

   1. CONSULT

      1. Ignition switch OFF.

         Note:

         Wait at least 10 seconds after placing ignition switch in the OFF position.

      2. Start the engine.

         Note:

         Wait at least 10 seconds after start the engine.

      3. Select "Self Diagnostic Result" mode of "ABS".

   Is DTC “C1073-01” detected?

   YES >>

   “CRNT” is displayed: Refer to DTC Diagnosis Procedure.

   YES >>

   “PAST” is displayed: Inspection End. (Erase "Self Diagnostic Result" mode of "ABS".)

   NO >>

   To check malfunction symptom before repair: Refer to Intermittent Incident.

   NO >>

   Confirmation after repair: Inspection End.

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

1. CHECK CONNECTOR

   1. 1. Ignition switch OFF.

      2. Check the vacuum sensor harness connector for disconnection or looseness.

      3. Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.

   Is the inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   Repair / replace harness or connector, and GO TO 2.

2. CHECK TERMINAL

   1. 1. Ignition switch OFF.

      2. Disconnect vacuum sensor harness connector.

      3. Check the vacuum sensor pin terminals for damage or loose connection with harness connector.

      4. Disconnect ABS actuator and electric unit (control unit) harness connector.

      5. Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Repair / replace harness, connector, or terminal.

3. CHECK VACUUM SENSOR CIRCUIT

   1. 1. Ignition switch OFF.

      2. Disconnect vacuum sensor harness connector.

      3. Disconnect ABS actuator and electric unit (control unit) harness connector.

      4. Check the continuity between vacuum sensor harness connector and ABS actuator and electric unit (control unit) harness connector.

         Vacuum sensor		ABS actuator and electric unit (control unit)		Continuity
         Connector	Terminal	Connector	Terminal
         E31	1	E33	32	Yes
         	2		35
         	3		4

      5. Check the continuity between vacuum sensor harness connector and ground.

         Vacuum sensor		—	Continuity
         Connector	Terminal
         E31	1	Ground	No
         	2
         	3

   Is the inspection result normal?

   YES >>

   GO TO 4.

   NO >>

   Repair / replace harness or connector.

4. REPLACE VACUUM SENSOR

   1. CONSULT

      1. Connect ABS actuator and electric unit (control unit) harness connector.

      2. Replace the vacuum sensor.

         CAUTION:

         Always replace brake booster because vacuum sensor cannot be disassembled. Refer to Removal and Installation.

      3. Erase "Self Diagnostic Result" mode of “ABS”.

      4. Ignition switch OFF → ON → OFF.

         Note:

         Wait at least 10 seconds after placing ignition switch in the OFF or ON position.

      5. Start engine.

         Note:

         Wait at least 10 seconds after start the engine.

      6. Select "Self Diagnostic Result" mode of "ABS".

   Is DTC “C1073-01” detected?

   YES >>

   Replace the ABS actuator and electric unit (control unit). Refer to Removal and Installation.

   NO >>

   Inspection End.