Terminals Of Ecu
- CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
- Disconnect the 2A, 2B, 2C, 2E, 2F and 2G junction block connectors and E63 main body ECU connector.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Measure the resistance and voltage between each terminal of the wire harness side connectors and body ground.CONNECTOR TERMINAL REFERENCE
Tester Connection Wiring Color Terminal Description Condition Specified Condition 2G-1 (IG) - Body ground W - Body ground Ignition power supply (IG signal) Ignition switch ON → off 11 to 14 V → Below 1 V 2F-5 (ACC) - Body ground L - Body ground Ignition power supply (ACC signal) Ignition switch ACC → off 11 to 14 V → Below 1 V 2B-30 (BECU) - Body ground W - Body ground +B power supply Always 11 to 14 V 2G-1 (ALTB) - Body ground L - Body ground +B (power system alternator system) power supply Always 11 to 14 V 2E-23 (KSW) - Body ground L - Body ground Unlock warning switch input No key in ignition key cylinder (OFF) → Key inserted (ON) 10 kΩ or higher → Below 1 Ω 2E-17 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω 2C-6 (DCTY) - Body ground R - Body ground Driver side door courtesy light switch input Driver side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω 2E-20 (PCTY) - Body ground BE - Body ground Passenger side door courtesy light switch input Passenger side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω E63-13 (LCTY) - Body ground B - Body ground Rear courtesy light switch LH input Rear door LH CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω 2E-19 (RCTY) - Body ground Y - Body ground Rear courtesy light switch RH input Rear door RH CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω 2A-7 (BCTY) - Body ground LG - Body ground Luggage compartment door courtesy light switch input Luggage compartment door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the main body ECU and instrument panel junction block connectors.
- Measure the voltage between each terminal of the wire harness side connectors and body ground.CONNECTOR TERMINAL REFERENCE
Tester Connection Wiring Color Terminal Description Condition Specified Condition 2S-17 (HAZ) - Body ground BE - Body ground Turn signal flasher relay signal Any transmitter switch is pressed → released Below 1 V → 11 to 14 V* E63-15 (BZR) - Body ground R - Body ground Wireless door lock buzzer Wireless door lock buzzer OFF → ON Below 1 V → 11 to 14 V HINT:
*: Operates only when the answer back function is enabled.
- Disconnect the 2A, 2B, 2C, 2E, 2F and 2G junction block connectors and E63 main body ECU connector.