TERMINALS OF ECU
NOTICE:
Click here
HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
Click here
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY
(a) Remove the power distribution box assembly and the main body ECU (multiplex network body ECU).
Click here
(b) Connect the power distribution box assembly connectors.
(c) Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|
MB-13 (GND1) - Body ground |
Ground |
Always |
Below 1 Ω |
MB-14 (GND2) - Body ground |
Ground |
Always |
Below 1 Ω |
MB-26 (BECU) - Body ground |
Auxiliary battery power supply |
Ignition switch off |
11 to 14 V |
MB-27 (IGR) - Body ground |
Ignition power supply (IG signal) |
Ignition switch ON |
11 to 14 V |
(d) Install the power distribution box assembly and the main body ECU (multiplex network body ECU).
(e) Measure the voltage and check for pulses according to the value(s) in the table below.
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|
8E-5 - Body ground |
CXPI communication line |
Ignition switch off |
Below 1 V |
Ignition switch ON |
Pulse generation |
||
8F-43 - Body ground |
Rear window defogger signal (output) |
Rear window defogger switch off |
Below 1.5 V |
Rear window defogger switch on |
8 to 14 V |
||
8F-38 - Body ground |
Back-up light output |
Ignition switch ON, shift position is not R |
Below 1.5 V |
Ignition switch ON, shift position is R |
8 to 14 V |
||
8C-4 - Body ground |
DOME CUT relay output |
Ignition switch off |
8 to 14 V |
8F-20 - Body ground |
|||
8B-2 - Body ground |
Mirror heater drive voltage (output) |
Rear window defogger switch off |
Below 1.5 V |
Rear window defogger switch on |
8 to 14 V |
||
8F-30 - Body ground |
Tail light output |
Tail light not illuminated |
Below 1.5 V |
Tail light illuminated |
8 to 14 V |
||
8F-25 - Body ground |
Front fog light output |
Tail light illuminated, front fog light switch off |
8 to 14 V |
Tail light illuminated, front fog light switch on |
Below 1.5 V |