DTC B2789: No Response from ID BOX: Procedure
WARNING: This page is about a different variant/trim than selected.
- CHECK HARNESS AND CONNECTOR (ID CODE BOX - AUXILIARY BATTERY AND BODY GROUND)
- Disconnect the L10 ID code box connector.
- Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition L10-8 (GND) - Body ground Always Below 1 Ω Standard Voltage
Tester Connection Condition Specified Condition L10-1 (+B) - Body ground Power switch off 11 to 14 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ID CODE BOX)
- Disconnect the L62 certification ECU (smart key ECU assembly) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition L62-29 (LIN) - L10-3 (LIN1) Always Below 1 Ω L62-29 (LIN) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
- Replace the ID code box (immobiliser code ECU). Refer to REMOVAL .
NEXT: Go to next step
- CHECK DTC OUTPUT
- Clear the DTC. Refer to DTC CHECK / CLEAR .
- Recheck for DTCs.
OK
DTC B2789 is not output.
NG → See step 5
OK → END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE)
- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL