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DTC C2328 Radar PWR.supply VOLT.(Below 9V)
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
OPERATION
BSW-ECU (master) power supply is provided from the battery via ETACS-ECU.
 
 
CHECK CONDITION
Ignition switch is in the "ON" position.
 
 
DIAGNOSTIC FUNCTION AND TROUBLE JUDGMENT
When system voltage remains less than 9 volts, the BSW-ECU (master) will set DTC C2328.
 
 
TROUBLESHOOTING HINTS
  • Battery failure
  • Loose battery terminal
  • Malfunction of charging system
  • Malfunction of ETACS-ECU (power supply circuit system)
  • Malfunction of BSW-ECU (master) (power supply circuit system)
  • Malfunction of BSW-ECU (master)
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Check the battery.
Refer to Battery Test .
Is the check result normal?
Go to Step 2.
Charge or replace the battery.
 
STEP 2. Resistance measurement at BSW-ECU (master) connector terminal GND.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the BSW-ECU (master) connector terminal GND and body ground.
OK: Is the measured resistance 2 ohms or less
Is the check result normal?
Go to Step 3.
Repair the ground line circuit {between the BSW-ECU (master) and body ground}.
 
STEP 3. Voltage measurement at BSW-ECU (master) connector terminal IG.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check the voltage between the BSW-ECU (master) connector terminal IG and body ground.
OK: Is the measured voltage approximately 12 volts (battery positive voltage)
Is the check result normal?
Go to Step 4.
Repair the power supply circuit {between the BSW-ECU (master) and ETACS-ECU}.
 
STEP 4. 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 ).