DTC C1562: Reverse On Fault

DTC detecting condition: 

Abnormal reverse signal

Trouble symptom: 

Hill start assist does not operate.

Wiring diagram: 

Back-up light system Ref. to WIRING SYSTEM>BACK-UP LIGHT SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK LAN SYSTEM  .

   Check the LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

   Is the check result OK?

   Yes:  Go to  2.

   No:  Perform the diagnosis for LAN system.

2. CHECK REVERSE SIGNAL USING SUBARU SELECT MONITOR  .

   Using the Subaru Select Monitor, read data of [Reverse Signal] in the [Data Monitor] of [Brake Control]. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DATA MONITOR .

   Is "OFF" displayed when the shift lever is placed in any position other than reverse, and is "ON" displayed in reverse position?

   Yes:  Go to  5.

   No:  Go to  3.

3. CHECK BACK-UP LIGHT ILLUMINATION  .
   1. Turn the ignition switch to ON.
   2. Place the shift lever in reverse position.

   Does the back-up light illuminate?

   Yes:  Go to  4.

   No:  Repair the back-up light circuit.

4. CHECK HARNESS BETWEEN BODY INTEGRATED UNIT AND BACK-UP LIGHT SWITCH (CHECK FOR OPEN CIRCUIT)  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the connectors from body integrated unit and back-up light switch.
   3. Measure the resistance of harness between body integrated unit and back-up light switch connector.

      Connector & terminal 

      (B73) No. 18 - (T45) No. 1:

   Is the resistance less than 1 Ω?

   Yes:  Replace the back-up light switch. Ref. to MANUAL TRANSMISSION AND DIFFERENTIAL (TY75)>SWITCHES AND HARNESS .

   No:  Repair the harness between body integrated unit and back-up light switch connector.

5. CHECK VDCCM & H/U  .
   1. Connect all connectors.
   2. Using the Subaru Select Monitor, perform the clear memory of [Brake Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .
   3. Execute the inspection mode. Ref. to BRAKE CONTROL (DIAGNOSTICS)>INSPECTION MODE .
   4. Read the DTC of [Brake Control] using the Subaru Select Monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is the same DTC displayed?

   Yes:  Replace the VDCCM & H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U) .

   No:  Go to  6.

6. CHECK DETECTION OF OTHER DTCS FOR VDC  .

   Read the DTC of [Brake Control] using the Subaru Select Monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is any other DTC displayed?

   Yes:  Perform the diagnosis according to the DTC. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

   No:  Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.