Power Steering 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 CAN BUS WIRE FOR DISCONNECTION (POWER STEERING ECU BRANCH WIRE)
- Turn the ignition switch off.
- Disconnect the power steering ECU connector.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*a Front view of wire harness connector:
(to Power Steering ECU) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Switch Condition Specified Condition E51-1 (CANH) - E51-7 (CANL) Ignition switch off 54 to 69 Ω
NG → REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (POWER STEERING ECU BRANCH WIRE)
OK: Go to next step
- CHECK WIRE HARNESS (POWER STEERING ECU - BATTERY AND BODY GROUND)
- Disconnect the power steering ECU connectors.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*a Front view of wire harness connector:
(to Power Steering ECU) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A23-2 (PGND) - 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 A23-1 (PIG) - Body ground Always 10 to 14 V E51-6 (IG) - Body ground Ignition switch ON 10 to 14 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 3
- Disconnect the power steering ECU connectors.
- REPLACE POWER STEERING ECU. Refer to REMOVAL