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DTC C2328 Radar PWR.supply VOLT.(Below 9V)
 
 
cautionBefore replacing the ECU, ensure that the input and output signal circuits are normal.
 
 
OPERATION
BSW-ECU (slave) power supply is provided from the battery via ETACS-ECU.
 
 
CHECK CONDITION
Ignition switch is in the ON position.
 
 
DIAGNOSTIC FUNCTION AND JUDGMENT CRITERIA
When system voltage remains less than 9 volts, the BSW-ECU (slave) will set DTC C2328.
 
 
TROUBLESHOOTING HINTS
  • Battery failure
  • Loose battery terminal
  • The charging system may be defective
  • The ETACS-ECU (power supply circuit system) may be defective
  • The BSW-ECU (slave) (power supply circuit system) may be defective
  • The BSW-ECU (slave) may be defective
 
 
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. Connector check: BSW-ECU (slave) connector G-24
Is BSW-ECU (slave) connector G-24 in good condition?
Go to Step 3.
The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
 
STEP 3. Resistance measurement at BSW-ECU (slave) connector G-24 (terminal No.6)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the BSW-ECU (slave) connector G-24 (terminal No.6) and body ground.
OK: Continuity exists (2 ohms or less)
Is the check result normal?
Go to Step 4.
The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
 
STEP 4. Voltage measurement at BSW-ECU (slave) connector G-24 (terminal No.1)
(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 (slave) connector G-24 (terminal No.1) and body ground.
OK: Battery positive voltage
Is the check result normal?
Go to Step 5.
The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
 
STEP 5. Check whether the DTC is set again.
Check again if the DTC is set in the BSW-ECU (slave).
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III). Refer to "How to connect Scan Tool (M.U.T.-III) ."
(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 (slave).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).