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DTC C2323 Mirror indicator short to ground
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
OPERATION
The BSW-ECU (master) energizes and controls the blind spot warning light (LH), which is integrated in the door mirror assembly.
 
 
CHECK CONDITION
When all of the conditions below are satisfied:
  • Ignition switch is in the "ON" position.
  • BSW-ECU (master) system voltage is at 9 - 16 volts.
 
 
DIAGNOSTIC FUNCTION AND TROUBLE JUDGMENT
The BSW-ECU (master) will set DTC C2323 when all of the following conditions are satisfied:
  • The blind spot warning light (LH) is energized
  • BSW-ECU (master) terminal AN1 voltage measures less than 1 volt
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the blind spot warning light within the door mirror assembly (LH)
  • Malfunction of the BSW-ECU (master)
  • Damaged harness wires and connectors
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Check of short to ground in AN1 line between BSW-ECU (master) connector and door mirror assembly (LH) (incorporating blind spot warning light) connector.
Is the check result normal?
Go to Step 2.
Repair the connector(s) or wiring harness. (Replace the harness assembly because the aluminum harness cannot be repaired.)
 
STEP 2. Check the blind spot warning light (LH).
Refer to GROUP 51 - Door Mirror Inspection .
Is the check result normal?
Go to Step 3.
Repair the door mirror main harness (LH) or replace the mirror (LH).
 
STEP 3. Using scan tool (M.U.T.-IIISE), read the DTC again.
Check again if the DTC is set in the BSW-ECU (master).
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Erase the DTC.
(3) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(4) Check if the DTC is set.
Is the DTC set?
Replace the BSW-ECU (master).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).