DTC C1562 Reverse On Fault: Wiring diagram

Back-up light system Ref. to WIRING SYSTEM>Back-up Light System>WIRING DIAGRAM>NON-TURBO MODEL .

CAN communication system Ref. to WIRING SYSTEM>CAN Communication System>WIRING DIAGRAM>NON-TURBO MODEL .

Fig 1: CAN Communication System Wiring Diagram (Reverse ON Fault)

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK LAN SYSTEM. 

   Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure .

   Is there any fault in LAN system?

   • Yes  : Perform the diagnosis according to DTC for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>List of Diagnostic Trouble Code (DTC) .
   • No  : Go to 2. 
2. CHECK REVERSE SIGNAL USING SUBARU SELECT MONITOR. 
   1. Using the Subaru Select Monitor, select Data monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Subaru Select Monitor>OPERATION>DATA MONITOR .
   2. Read [Reverse Signal] indicated on the display screen.

   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 

      (B281) No. 12 - (B24) No. 1:

   Is the resistance less than 1 Ω?

   • Yes  : Replace the back-up light switch. Ref. to MANUAL TRANSMISSION AND DIFFERENTIAL(6MT)>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. Clear the memory. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Clear memory .
   3. Perform the Inspection Mode. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Inspection Mode .
   4. Read the DTC. Ref. to BRAKE CONTROL (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC) .

   Is the same DTC displayed?

   • Yes  : Replace the VDCCM only. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)>REPLACEMENT .
   • No  : Go to 6. 
6. CHECK DETECTION OF OTHER DTCS FOR VDC. 

   Ref. to BRAKE CONTROL (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC) .

   Is any other DTC displayed?

   • Yes  : Perform the diagnosis according to DTC. Ref. to BRAKE CONTROL (DIAGNOSTICS)>List of Diagnostic Trouble Code (DTC) .
   • No  : Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.