4WD Control ECU Communication Stop Mode: Procedure
WARNING: This page is about a different car, the 2011 Toyota Matrix. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK OPEN IN CAN BUS WIRE (4WD CONTROL ECU BRANCH LINE)
- Turn the ignition switch off.
- Disconnect the 4WD control ECU connector.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*a Front view of wire harness connector:
(to 4WD Control ECU) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Switch Condition Specified Condition E17-14 (CANH) - E17-16 (CANL) Ignition switch off 54 to 69 Ω
NG → REPAIR OR REPLACE 4WD CONTROL ECU BRANCH WIRE OR CONNECTOR
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)
- Measure the voltage according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*a Front view of wire harness connector:
(to 4WD Control ECU)Standard Voltage
Tester Connection Switch Condition Specified Condition E17-11 (IG1) - Body ground Ignition switch ON 10 to 14 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE TERMINAL)
OK: Go to next step
- Measure the voltage according to the value(s) in the table below.
- CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)
- Measure the resistance according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*a Front view of wire harness connector:
(to 4WD Control ECU)Standard Resistance
Tester Connection Condition Specified Condition E17-23 (GND) - Body ground Always Below 1 Ω
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND TERMINAL)
OK → See step 4
- Measure the resistance according to the value(s) in the table below.
- REPLACE 4WD CONTROL ECU. Refer to REMOVAL