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.
- CHECK CAN BUS LINE FOR DISCONNECTION (MAIN BODY ECU BRANCH WIRE)
- Turn the ignition switch off.Fig 1: Automatic Light Control System Connector Terminal Identifications (With And Without Smart Key System)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*A w/ Smart Key System or Automatic Light Control System *B w/o Smart Key System or Automatic Light Control System *a Front view of wire harness connector
(to Main Body ECU) - Disconnect the main body ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
w/ Smart Key System or Automatic Light Control System
w/o Smart Key and Start System or Automatic Light Control System
Tester Connection Switch Condition Specified Condition E52-15 (CANH) - E52-16 (CANL) Ignition switch off 54 to 69 Ω Tester Connection Switch Condition Specified Condition E61-23 (CANH) - E61-22 (CANL) Ignition switch off 54 to 69 Ω
NG → REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (MAIN BODY ECU BRANCH WIRE)
OK: Go to next step
- Turn the ignition switch off.
- CHECK HARNESS AND CONNECTOR (BECU, IG, GND1)
- Disconnect the instrument panel junction block connectors.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*a Front view of wire harness connector
(to Instrument Panel Junction Block) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 2E-17 (GND1) - Body ground Always Below 1 Ω - Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition 2B-30 (BECU) - Body ground Always 10 to 14 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)
- Disconnect the instrument panel junction block connectors.