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05-1799
DIAGNOSTICS - WIRELESS DOOR LOCK CONTROL SYSTEM
059TQ-02
TERMINALS OF ECU
1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU)
Vehicle Rear Side Vehicle Front Side
1K
B6 B7 B9 B8
1L
1C
1A 1P
Multiplex Network
Body ECU
1K
B6 B7
1L
1C
B9 B8
1A 1P
B67998
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1982
05-1800
DIAGNOSTICS - WIRELESS DOOR LOCK CONTROL SYSTEM
(a) Disconnect the B6, B7 and B9 ECU connectors.
(b) Disconnect the 1A, 1C, 1K,1L and 1P J/B connectors.
(c) Check the voltage and resistance between each terminal of the wire harness side connectors and body
ground.
Standard:
Symbols (Terminal No.) Wiring Color Condition Specified Condition
IG (1A-1) -
W - Body ground Constant 10 to 14 V
Body ground
ACC (1A-1) -
W - Body ground Constant 10 to 14 V
Body ground
BECU (1C-24) -
W-L - Body ground Constant 10 to 14 V
Body ground
ALTB (1C-30) -
B - Body ground Constant 10 to 14 V
Body ground
KSW (B6-21) - 10 k or higher
L-B - Body ground No key in ignition key cylinder Key inserted
Body ground Below 1
DCTY (B9-14) - 10 k or higher
R-Y - Body ground Driver side door CLOSED OPEN
Body ground Below 1
PCTY (B7-23) - 10 k or higher
R-Y - Body ground Passenger side door CLOSED OPEN
Body ground Below 1
RCTY (B9-16) - 10 k or higher
R-W - Body ground Rear door RH CLOSED OPEN
Body ground Below 1
LCTY (1P-19) - 10 k or higher
GR - Body ground Rear door LH CLOSED OPEN
Body ground Below 1
BCTY (B7-25) - 10 k or higher
G-W - Body ground Back door CLOSED OPEN
Body ground Below 1
GND1 (1L-16) -
W-B - Body ground Constant Below 1
Body ground
GND2 (1K-17) -
W-B - Body ground Constant Below 1
Body ground
If the result is not as specified, there may be a malfunction on the wire harness side.
(d) Reconnect the B6, B7 and B9 ECU connectors.
(e) Reconnect the 1A, 1C, 1K,1L and 1P J/B connectors.
(f) Check the voltage between each terminal of the connectors and the body ground.
Standard:
Symbols (Terminal No.) Wiring Color Condition Specified Condition
HAZ (B6-2) - Below 1 V
G-O - Body ground Answer-back OFF Answer-back ON
Body ground Pulse generation
BZR (B8-2) - Below 1 V
G - Body ground Wireless buzzer OFF ON
Body ground Pulse generation
Below 1 V
RDA (B9-12) - No key in ignition key cylinder, all doors closed and
P-L - Body ground Approx. 6 to 7 V
Body ground transmitter switch OFF ON
Below 1 V
If the result is not as specified, the J/B assy (body ECU) may have a malfunction.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1983
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