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05-1595
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM
05BYX-02
TERMINALS OF ECU
1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU)
Vehicle Rear Side Vehicle Front Side
1K 1J
B6 B7 B9
1L
1C
1A 1P
Multiplex Network
Body ECU
1K
B6 B7
1L
1C
B9
1J
1A 1P
B69869
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1778
05-1596
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM
(a) Disconnect the 1C, 1J, 1L, 1K, 1P, B6, B7 and B9 J/B connectors.
(b) Check the voltage and resistance between each terminal of the wire harness side connectors and the
body ground.
Standard:
Terminal No. Wiring Color Condition Specified Condition
1L-7 (BECU) -
W-L - Body ground Constant 10 to 14 V
Body ground
1C-24 (BECU) -
W-L - Body ground Constant 10 to 14 V
Body ground
1C-30 (ALTB) -
B - Body ground Constant 10 to 14 V
Body ground
1L-16 (GND1) -
W-B - Body ground Constant Below 1
Body ground
1K-17 (GND2) -
W-B - Body ground Constant Below 1
Body ground
1K-25, 1J-3 (L1) - Door control switch (Master switch or passenger side)
R-Y - Body ground
Body ground OFF LOCK 10 k or higher Below 1
1K-22, 1J-4 (UL1) - Door control switch (Master switch or passenger side)
G - Body ground
Body ground OFF UNLOCK 10 k or higher Below 1
1K-26 (L2) -
LG - Body ground Driver side door key cylinder OFF LOCK
Body ground 10 k or higher Below 1
1J-5 (L2) -
LG - Body ground Passenger side door key cylinder OFF LOCK
Body ground 10 k or higher Below 1
B9-8 (UL3) -
L - Body ground Driver side door key cylinder OFF UNLOCK
Body ground 10 k or higher Below 1
B7-4 (UL2) -
L-Y - Body ground Passenger side door key cylinder OFF UNLOCK
Body ground 10 k or higher Below 1
B9-14 (DCTY) -
R-Y - Body ground Driver side door CLOSED OPEN
Body ground 10 k or higher Below 1
B7-23 (PCTY) -
R-Y - Body ground Passenger side door CLOSED OPEN
Body ground 10 k or higher Below 1
B9-16 (RCTY) -
R-W - Body ground Rear door RH CLOSED OPEN
Body ground 10 k or higher Below 1
1P-19 (LCTY) -
GR - Body ground Rear door LH CLOSED OPEN
Body ground 10 k or higher Below 1
B7-25 (BCTY) -
G-W - Body ground Back door CLOSED OPEN
Body ground 10 k or higher Below 1
B6-21 (KSW) -
L-B - Body ground No key in ignition key cylinder Key inserted
Body ground 10 k or higher Below 1
B7-3 (BDSU)* -
G-B - Body ground Back door opener switch OFF ON
Body ground 10 k or higher Below 1
* w/o Power back door
If the result is not as specified, there may be a malfunction on the wire harness side.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1779
05-1597
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM
(c) Reconnect the connectors, and check the voltage between each terminal of the connectors and the
body ground.
Standard:
Terminal No. Wiring Color Condition Specified Condition
1A-1 (IG) -
W - Body ground Ignition switch OFF ON 10 to 14 V Below 1 V
Body ground
1K-2 (ACT+) -
L-R - Body ground
Body ground
1J-1 (ACT+) - Door control switch (Master switch or passenger side
L-R - Body ground switch) or door key cylinder (Driver side)
Body ground
OFF Below 1 V
1P-17 (ACT+) -
L-R - Body ground LOCK 10 to 14 V
Body ground
OFF Below 1 V
B6-1 (* TR+) -
L-B - Body ground
Body ground
1J-2 - (ACT-) - Door control switch (Master switch or passenger side
L-B - Body ground
Body ground switch) or door key cylinder (Driver side)
OFF Below 1 V
1P-6 - (ACT-) - LOCK 10 to 14 V
L-B - Body ground
Body ground OFF Below 1 V
B9-4 (ACTD) -
W-R - Body ground Driver side door UNLOCK LOCK Below 1 V 10 to 14 V
Body ground
Driver side door
B9-7 (LSWD) -
BR-R - Body ground UNLOCK Below 1 V
Body ground
LOCK 10 to 14 V (or Pulse generation)
Passenger side door
B7-27 (LSWP) -
Y - Body ground UNLOCK Below 1 V
Body ground
LOCK 10 to 14 V (or Pulse generation)
Rear left door
1P-5 (LSWL) -
L-R - Body ground UNLOCK Below 1 V
Body ground
LOCK 10 to 14 V (or Pulse generation)
Rear right door
B7-5 (LSWR) -
L-R - Body ground UNLOCK Below 1 V
Body ground
LOCK 10 to 14 V (or Pulse generation)
* w/o Power Back Door
HINT:
Use an oscilloscope to check the output voltages of the terminals LSWD, LSWP, LSWL and LSWR.
If the result is not as specified, the J/B assy (body ECU) may have a malfunction.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1780
05-1598
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM
2. w/ Power back door:
CHECK POWER BACK DOOR ECU
P14 P13
B68464
(a) Disconnect the P13 and P14 ECU connectors, and check the voltage or resistance of each terminal
of the wire harness side connectors.
Standard:
Terminal No. Wiring Color Condition Specified Condition
P14-2 (B) - Body ground B-R - Body ground Constant 10 to 14 V
P13-10 (ECUB) - Body ground W-L - Body ground Constant 10 to 14 V
P13-9 (IG) - Body ground B-R - Body ground Ignition switch OFF ON 0 V 10 to 14 V
P14-8 (GND) - Body ground W-B - Body ground Constant Below 1
P13-3 (HSW) - Body ground G-B - Body ground Back door opener switch OFF ON 10 k or higher Below 1
If the result is not as specified, there may be a malfunction on the wire harness side.
(b) Reconnect the ECU connectors, and check the voltage of each terminal of the connectors.
Standard:
Terminal No. Wiring Color Condition Specified Condition
CTYO (P14-4) - Body ground G-W - Body ground
Back door CLOSED OPEN 10 to 14 V Below 1 V
FUL (P13-8) - Body ground B-W - Body ground
If the result is not as specified, the ECU may have a malfunction.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1781
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