Inspection Procedure: Procedure

WARNING: This page is about a different car, the 2011 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

CLEAR DTC
1. Clear the DTC. Refer to DTC CHECK / CLEAR .
NEXT: Go to next step
CHECK FOR DTC
1. Recheck for the DTC. Refer to DTC CHECK / CLEAR .
  OK
  
  B2789 is not output.
NG → See step 3

OK → See step 7

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ID CODE BOX)

Disconnect the E36 and E22 connectors.

Fig 1: Identifying E36 And E22 Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
E36-10 (LIN) - E22-3 (LIN1)	Always	Below 1 Ω
E36-10 (LIN) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (ID CODE BOX BATTERY VOLTAGE AND GROUND)

Measure the resistance and voltage according to the value(s) in the table below.

Fig 2: Identifying E32 ID Code Box Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

Tester Connection	Condition	Specified Condition
E22-8 (GND) - Body ground	Always	Below 1 Ω

Standard Voltage

Tester Connection	Condition	Specified Condition
E22-1 (+B) - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

REPLACE ID CODE BOX (IMMOBILIZER CODE ECU)
1. Replace the ID code box (immobilizer code ECU). Refer to REMOVAL .
NEXT: Go to next step
CHECK FOR DTC
1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Recheck for the DTC.
  OK
  
  B2789 is not output.
NG → See step 8

OK → END (ID CODE BOX (IMMOBILIZER CODE ECU) IS DEFECTIVE)
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL