When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSTIC FUNCTION
When a short to power supply is detected in the wiring harness in between the inside and outside transmission antenna assembly, KOS-ECU sets the DTC B2419.
note
When the DTC B2419 is set, KOS-ECU does not perform the certification with the keyless operation key.
TECHNICAL DESCRIPTION (COMMENT)
When an abnormality is found with the wiring harness in between the inside and outside transmission antenna assembly, KOS-ECU determines that a problem has occurred.
TROUBLESHOOTING HINTS
Damaged wiring harness and connectors
Malfunction of the KOS-ECU
DIAGNOSIS
Required Special Tools:
MB991223: Harness Set
MB992006: Extra Fine Probe
STEP 1. Check the wiring harness between KOS-ECU connector and each inside and outside transmission antenna assembly connector.
Check the following wiring harnesses for short to power supply.
Check of short to power supply, short to ground, and open circuit in EDRP, EDRG line between KOS-ECU connector and outside transmission antenna assembly (driver’s side) connector
Check of short to power supply, short to ground, and open circuit in EASP, EASG line between KOS-ECU connector and outside transmission antenna assembly (passenger’s side) connector
Check of short to power supply, short to ground, and open circuit in INFP, INFG line between KOS-ECU connector and inside transmission antenna assembly (front) connector
Check of short to power supply, short to ground, and open circuit in INRP, INRG line between KOS-ECU connector and inside transmission antenna assembly (rear) connector
Check of short to power supply, short to ground, and open circuit in EGTP, EGTG line between KOS-ECU connector and outside transmission antenna assembly (liftgate) connector
Is the check result normal?
Go to Step 2.
Repair the connectors or wiring harness.
STEP 2. Check whether the diagnostic trouble code is set again.
(1) Erase the DTC.
(2) Turn the power supply mode of the electric motor switch from OFF to ON.
(3) Check if the DTC is set.
Is the DTC set?
Replace KOS-ECU and register the ID codes (Refer to ).