DTC C1505: Steering angle sensor (detected by ASC side); DTC C1506: Steering angle sensor error (detected by itself): Diagnosis

Required Special Tools: 

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827 M.U.T.-III USB Cable
  • MB991910 M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. 
   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
   1. Connect scan tool MB991958 to the data link connector.
   2. Turn the ignition switch to the "ON" position.
   3. Diagnose the CAN bus line.
   4. Turn the ignition switch to the "LOCK" (OFF) position.

      Q: Is the CAN bus line found to be normal? 

      1. YES:  Go to Step  3.
      2. NO:  Repair the CAN bus line (Refer to DIAGNOSIS . Then go to Step 2.
         Fig 1: Connecting Special Tool MB991910 To Data Link Connector

         Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Recheck for diagnostic trouble code. 
   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
   1. Turn the ignition switch to the "ON" position.
   2. Erase the DTC.
   3. Turn the ignition switch to the "LOCK" (OFF) position.
   4. Turn the ignition switch to the "ON" position.
   5. Check if the DTC is set.
   6. Turn the ignition switch to the "LOCK" (OFF) position.

      Q: Is DTC C1505 or C1506 set? 

      1. YES <C1505 is set>:  Go to Step 3.
      2. YES <C1506 is set>:  Check the steering wheel sensor DTC, and diagnose the DTC (Refer to DIAGNOSTIC TROUBLE CODE PROCEDURES <STEERING WHEEL SENSOR>  .
      3. NO:  The procedure is complete.
         Fig 2: Connecting Special Tool MB991910 To Data Link Connector

         Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
3. STEP 3. Using scan tool MB991958, check data list item 11: Steering angle. 
   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
   1. Connect scan tool MB991958 to the data link connector.
   2. Turn the ignition switch to the "ON" position.
   3. Set scan tool MB991958 to data reading mode for item 11, Steering angle.
      • Correct angle is displayed as the steering wheel is turned.

      Q: Does the steering wheel sensor send correct steering angle? 

      1. YES:  Go to step  6.
      2. NO:  Align the steering wheel sensor neutral point and carry out calibration (Refer to STEERING WHEEL SENSOR  . Then go to Step 4.
         Fig 3: Connecting Special Tool MB991910 To Data Link Connector

         Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. STEP 4. Recheck for diagnostic trouble code. 

   Check again if the DTC is set.

   1. Turn the ignition switch to the "ON" position.
   2. Erase the DTC.
   3. Turn the ignition switch to the "LOCK" (OFF) position.
   4. Turn the ignition switch to the "ON" position.
   5. Check if the DTC is set.
   6. Turn the ignition switch to the "LOCK" (OFF) position.

      Q: Is DTC C1505 set? 

      1. YES:  Go to Step 5.
      2. NO:  The procedure is complete.
         Fig 4: Connecting Special Tool MB991910 To Data Link Connector

         Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
5. STEP 5. Recheck for diagnostic trouble code after the steering wheel sensor is replaced. 
   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

   Replace the steering wheel sensor (Refer to STEERING WHEEL SENSOR  ), and check whether DTC C1505 is reset.

   1. Replace the steering wheel sensor.
   2. Connect scan tool MB991958 to the data link connector.
   3. Turn the ignition switch to the "ON" position.
   4. Erase the DTC.
   5. Turn the ignition switch to the "LOCK" (OFF) position.
   6. Turn the ignition switch to the "ON" position.
   7. Check if the DTC is set.
   8. Turn the ignition switch to the "LOCK" (OFF) position.

      Q: Is DTC C1505 set? 

      1. YES:  Replace the hydraulic unit (integrated with TCL/ASC-ECU). Then go to Step  7.
      2. NO:  The procedure is complete.
         Fig 5: Connecting Special Tool MB991910 To Data Link Connector

         Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
6. STEP 6. Recheck for diagnostic trouble code. 

   Check again if the DTC is set.

   1. Turn the ignition switch to the "ON" position.
   2. Erase the DTC.
   3. Turn the ignition switch to the "LOCK" (OFF) position.
   4. Turn the ignition switch to the "ON" position.
   5. Check if the DTC is set.
   6. Turn the ignition switch to the "LOCK" (OFF) position.

      Q: Is DTC C1505 set? 

      1. YES:  Replace the hydraulic unit (integrated with TCL/ASC-ECU). Then go to Step 7.
      2. NO:  It can be assumed that this malfunction is intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .
         Fig 6: Connecting Special Tool MB991910 To Data Link Connector

         Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
7. STEP 7. Recheck for diagnostic trouble code. 

   Check again if the DTC is set.

   1. Turn the ignition switch to the "ON" position.
   2. Erase the DTC.
   3. Turn the ignition switch to the "LOCK" (OFF) position.
   4. Turn the ignition switch to the "ON" position.
   5. Check if the DTC is set.
   6. Turn the ignition switch to the "LOCK" (OFF) position.

      Q: Is DTC C1505 set? 

      1. YES:  Go to Step  1.
      2. NO:  The procedure is complete.
         Fig 7: Connecting Special Tool MB991910 To Data Link Connector

         Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.