Terminals Of ECM
WARNING: This page is about a different car, the 2013 Toyota FJ Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK ECM
- Disconnect the B49, E77 and E78 ECM connectors.
- Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E78-24 (BATT) - Body ground L - Body ground Power source Always 11 to 14 V E78-8 (ST1-) - Body ground R-L - Body ground Stop light switch signal circuit Ignition switch ON, brake pedal released 11 to 14 V Ignition switch ON, brake pedal depressed Below 1 V E77-18 (STP) - Body ground G-Y - Body ground Stop light switch signal circuit Brake pedal depressed 11 to 14 V Brake pedal released Below 1 V E77-11 (CCS) - Body ground L-B - Body ground Cruise control switch circuit Cruise control switch on Below 2.5 Ω Cruise control switch off 1 MΩ or higher +RES switch held on 235 to 245 Ω -SET switch held on 617 to 643 Ω CANCEL switch held on 1509 to 1571 Ω B49-12 (E1) - Body ground BR - 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 ECM connectors.
- Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition B47-27 (D) - Body ground*1 V - Body ground Park/neutral position switch signal Ignition switch ON, shift lever D or 4 positions 11 to 14 V Ignition switch ON, shift lever other than D and 4 positions Below 1 V B47-27 (D) - Body ground*2 L-B - Body ground Clutch switch input signal Ignition switch ON, depress clutch pedal Below 1 V Ignition switch ON, release clutch pedal 11 to 14 V - *1: for Automatic Transmission
- *2: for Manual Transmission
If the result is not as specified, the ECM may be malfunctioning.