Terminals Of Ecu
1. CHECK STEERING LOCK ECU
(a) Disconnect the F68 steering lock ECU connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
F68-1 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
F68-6 (IG2) - F68-1 (GND) |
W - W-B |
IG2 signal input |
Engine switch off → engine switch on (IG) |
Below 1 V → 11 to 14 V |
F68-7 (B) - F68-1 (GND) |
GR - W-B |
Power source |
Always |
11 to 14 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the F68 steering lock ECU connector.
(d) Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
F68-3 (IGE) - F68-1 (GND) |
GR - W-B |
Power source for motor drive |
When all conditions are met:
|
11 to 14 V (Steering lock motor not operating) → Below 1 V (Steering lock motor operating) → 11 to 14 V (Steering lock motor not operating) |
F68-4 (SLP1) - F68-1 (GND) |
SB - W-B |
Unlock position sensor output signal |
Steering lock locked → steering lock unlocked |
11 to 14 V → Below 1.2 V |
If the result is not as specified, there may be a malfunction in the steering lock ECU.
Test yourself
A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.