Terminals Of Ecu
- CHECK FRONT LIGHT ECU (FRONT CONTROLLER)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the A50, A51, A52 and B14 ECU connectors.
- Measure the resistance and voltage according to the value(s) in the table below.TERMINAL DESCRIPTION REFERENCE CHART
Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition A52-5 (ALTB) - Body ground L - Body ground +B power supply Always 11 to 14 V A52-1 (BATB) - Body ground P - Body ground +B power supply Always 11 to 14 V A50-1 (FMB3) - Body ground LG - Body ground +B power supply Always 11 to 14 V A50-5 (FMIG) - Body ground Y - Body ground IG power supply Engine switch on (IG) 11 to 14 V A50-2 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the A50, A51, A52 and B14 ECU connectors.
- Measure the voltage according to the value(s) in the table below.TERMINAL DESCRIPTION REFERENCE CHART
Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition B14-1 (HORL) - Body ground G - Body ground Horn (low pitched) signal Horn is sounding 11 to 14 V B14-2 (HORH) - Body ground G - Body ground Horn (high pitched) signal Horn is sounding 11 to 14 V If the result is not as specified, the ECU may have a malfunction.
- CHECK STEERING PAD ECU (STEERING PAD SWITCH)
- Disconnect the z7 ECU connector.
- Measure the voltage according to the value(s) in the table below.TERMINAL DESCRIPTION REFERENCE CHART
Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition z7-10 (+B) - Body ground B - Body ground +B power supply Always 11 to 14 V If the result is not as specified, there may be a malfunction on the wire harness side.