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DTC C2254: IG SW malfunction
 
 
 
 
OPERATION
The IG1 signal is delivered from the ETACS-ECU (IG1 relay) through the multi-purpose fuse to the electric parking brake ECU.
 
 
DTC SET CONDITIONS
If the IG1 signal circuit remains open or short to ground for at least three seconds, the DTC will be set.
 
 
TROUBLESHOOTING HINTS
  • Damaged wiring harness or connector
    • Open or short to ground in the wires between the ETACS-ECU and the electric parking brake ECU, or high resistance in a connector
    • Blown fuse
  • Malfunction of the electric parking brake ECU
 
 
DIAGNOSIS
Required Special Tools:
  • MB992006: Extra Fine Probe
STEP 1. Measure the voltage at the electric parking brake ECU connector.
(1) Disconnect the electric parking brake ECU connector and measure at the wiring harness side.
(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between the IG1 terminal and body ground.
OK: Battery voltage
Is the check result normal?
Go to Step 2.
The IG1 signal circuit may be open or short to ground. Repair the wiring harness wires or connectors between the electric parking brake ECU connector and the ETACS-ECU.
 
STEP 2. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Check again if the DTC is set.
(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 to the LOCK (OFF) position.
(4) Turn the ignition switch to the ON position.
(5) Operate the electric parking brake switch to apply the electric parking brake.
(6) Check the DTC.
Is the DTC C2254 set?
Replace the electric parking brake ECU (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).