TERMINALS OF ECU
1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)
(a) Disconnect the 2C, 2F and 2K main body ECU (driver side junction block assembly) connectors.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
2C-24 (BECU) - Body ground |
L - Body ground |
Battery power supply |
Always |
11 to 14 V |
2C-30 (ALTB) - Body ground |
BR - Body ground |
Battery power supply |
Always |
11 to 14 V |
2F-16 (GND1) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
2K-17 (GND2) - Body ground |
W - Body ground |
Ground |
Always |
Below 1 Ω |
If the result is not as specified, there may be a malfunction in the wire harness.
(c) Reconnect the 2C, 2F and 2K main body ECU (driver side junction block assembly) connectors.
(d) Measure the voltage according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
D50-24 (DCTY) - Body ground |
V - Body ground |
Driver side door courtesy switch input |
Driver side door open |
Below 1 V |
D50-24 (DCTY) - Body ground |
V - Body ground |
Driver side door courtesy switch input |
Driver side door close |
Pulse generation |
D49-21 (PCTY) - Body ground |
V - Body ground |
Front passenger side door courtesy switch input |
Front passenger side door open |
Below 1 V |
D49-21 (PCTY) - Body ground |
V - Body ground |
Front passenger side door courtesy switch input |
Front passenger side door close |
Pulse generation |
2O-19 (LCTY) - Body ground |
R - Body ground |
Rear door LH courtesy light switch input |
Rear door LH open |
Below 1 V |
2O-19 (LCTY) - Body ground |
R - Body ground |
Rear door LH courtesy light switch input |
Rear door LH close |
Pulse generation |
D49-7 (RCTY) - Body ground |
GR - Body ground |
Rear door RH courtesy light switch input |
Rear door RH open |
Below 1 V |
D49-7 (RCTY) - Body ground |
GR - Body ground |
Rear door RH courtesy light switch input |
Rear door RH close |
Pulse generation |
D49-25 (BCTY) - Body ground |
GR - Body ground |
Back door courtesy light switch input |
Back door open |
Below 1 V |
D49-25 (BCTY) - Body ground |
GR - Body ground |
Back door courtesy light switch input |
Back door closed |
Pulse generation |
2J-3 (L1) - Body ground |
G - Body ground |
Front passenger side door control switch input |
Front passenger side door control switch lock side pressed |
Below 1 V |
2J-3 (L1) - Body ground |
G - Body ground |
Front passenger side door control switch input |
Front passenger side door control switch off |
11 to 14 V |
2J-4 (UL1) - Body ground |
L - Body ground |
Front passenger side door control switch input |
Front passenger side door control switch unlock side pressed |
Below 1 V |
2J-4 (UL1) - Body ground |
L - Body ground |
Front passenger side door control switch input |
Front passenger side door control switch off |
11 to 14 V |
2K-2 (ACT+) - Body Ground |
R - Body Ground |
Door lock motor lock drive output (Driver side) |
Power window regulator master switch assembly or driver side door key cylinder off |
Below 1 V |
2K-2 (ACT+) - Body Ground |
R - Body Ground |
Door lock motor lock drive output (Driver side) |
Power window regulator master switch assembly or driver side door key cylinder lock |
11 to 14 V |
D50-5 (ACTD) - Body Ground |
LG - Body Ground |
Door lock motor unlock drive output (Driver side) |
Power window regulator master switch assembly or driver side door key cylinder off |
Below 1 V |
D50-5 (ACTD) - Body Ground |
LG - Body Ground |
Door lock motor unlock drive output (Driver side) |
Power window regulator master switch assembly or driver side door key cylinder unlock |
11 to 14 V |
2J-1 (ACT+) - Body Ground |
R - Body Ground |
Door lock motor lock drive output (Front passenger side) |
Power window regulator master switch assembly or driver side door key cylinder off |
Below 1 V |
2J-1 (ACT+) - Body Ground |
R - Body Ground |
Door lock motor lock drive output (Front passenger side) |
Power window regulator master switch assembly or driver side door key cylinder lock |
11 to 14 V |
2J-2 (ACT-) - Body Ground |
SB - Body Ground |
Door lock motor unlock drive output (Front passenger side) |
Power window regulator master switch assembly off |
Below 1 V |
2J-2 (ACT-) - Body Ground |
SB - Body Ground |
Door lock motor unlock drive output (Front passenger side) |
Power window regulator master switch assembly unlock |
11 to 14 V |
2F-11 (ACT+) - Body Ground |
LG - Body Ground |
Door lock motor lock drive output (Rear right door) |
Power window regulator master switch assembly or driver side door key cylinder off |
Below 1 V |
2F-11 (ACT+) - Body Ground |
LG - Body Ground |
Door lock motor lock drive output (Rear right door) |
Power window regulator master switch assembly or driver side door key cylinder lock |
11 to 14 V |
2F-30 (ACT-) - Body Ground |
R - Body Ground |
Door lock motor unlock drive output (Rear right door) |
Power window regulator master switch assembly off |
Below 1 V |
2F-30 (ACT-) - Body Ground |
R - Body Ground |
Door lock motor unlock drive output (Rear right door) |
Power window regulator master switch assembly unlock |
11 to 14 V |
2O-17 (ACT+) - Body Ground |
GR - Body Ground |
Door lock motor lock drive output (Rear left door) |
Power window regulator master switch assembly or driver side door key cylinder off |
Below 1 V |
2O-17 (ACT+) - Body Ground |
GR - Body Ground |
Door lock motor lock drive output (Rear left door) |
Power window regulator master switch assembly or driver side door key cylinder lock |
11 to 14 V |
2O-6 (ACT-) - Body Ground |
R - Body Ground |
Door lock motor unlock drive output (Rear left door) |
Power window regulator master switch assembly off |
Below 1 V |
2O-6 (ACT-) - Body Ground |
R - Body Ground |
Door lock motor unlock drive output (Rear left door) |
Power window regulator master switch assembly unlock |
11 to 14 V |
D50-9 (LSWD) - Body Ground |
P - Body Ground |
Driver side door position switch input |
Driver side door unlock |
Below 1 V |
D50-9 (LSWD) - Body Ground |
P - Body Ground |
Driver side door position switch input |
Driver side door lock |
Pulse generation |
D49-27 (LSWP) - Body ground |
P - Body ground |
Front passenger side door lock position switch input |
Front passenger side door unlock |
Below 1 V |
D49-27 (LSWP) - Body ground |
P - Body ground |
Front passenger side door lock position switch input |
Front passenger side door lock |
Pulse generation |
2O-5 (LSR) - Body ground |
BR - Body ground |
Rear door LH lock position switch input |
Rear door LH unlock |
Below 1 V |
2O-5 (LSR) - Body ground |
BR - Body ground |
Rear door LH lock position switch input |
Rear door LH lock |
Pulse generation |
2F-5 (LSR) - Body ground |
Y - Body ground |
Rear door RH lock position switch input |
Rear door RH unlock |
Below 1 V |
2F-5 (LSR) - Body ground |
Y - Body ground |
Rear door RH lock position switch input |
Rear door RH lock |
Pulse generation |
If the result is not as specified, the main body ECU (driver side junction block assembly) may have a malfunction.
Precaution
PRECAUTION
1. WHEN DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL
NOTICE:
When disconnecting the cable from the negative (-) battery terminal, initialize
the following systems after the cable is reconnected.
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