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05-1759
DIAGNOSTICS - POWER BACK DOOR SYSTEM
05BZR-01
TERMINALS OF ECU
1. 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
P13-6 (MSW) - P13-5 (MSE) L-W Power back door main switch OFF ON Below 1 10 k or higher
P13-3 (HSW) - Body ground G-B - Body ground Back door opener switch OFF ON 10 k or higher Below 1
Power back door touch sensor LH
P13-14 (OSL) - P13-15 (OSE) G-W - Y-B
FREE PRESSED Approx. 1 k Less than 100
Power back door touch sensor RH
P13-16 (OSR) - P13-15 (OSE) BR-Y - Y-B
FREE PRESSED Approx. 1 k Less than 100
P13-22 (MPX1) - Body ground R-L - Body ground BEAN line 10 k or higher
If the result is not as specified, there may be a malfunction on the wire harness side.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1942
05-1760
DIAGNOSTICS - POWER BACK DOOR SYSTEM
(b) Reconnect the ECU connectors, and check the voltage of each terminal of the connectors.
Standard:
Terminal No. Wiring Color Condition Specified Condition
G-W -
P14-4 (CTYO) - Body ground Back door CLOSED OPEN 10 to 14 V Below 1 V
Body ground
P13-2 (BZR+) - O- S Buzzer that notifies the start of opening operation sounds at 2 cycles of S 10 to 14 V
Body ground Body ground approx. 0.5 sec. when A*1 or B*2 switch is pressed so that the power back (2 cycles of approx. 0.5 sec.)
door starts opening operation
d t t i ti
P13-1 (BZR-) - LG -
S All conditions necessary for warning buzzer to sound*3 are met S 10 to 14 V (a cycle of approx. 0.3 sec.)
Body ground Body ground
Any condition necessary for warning buzzer to stop*4 is met 0V
P13-26 (DSV) - P13-23 (DSG) Y - GR Constant 10 to 14 V
P13-25 (DS1) - P13-23 (DSG) BR - GR Back door fully closed and A or B switch turned ON 0V
Back door in opening operation Alternating between 10 to 14 V and 0 V
Alt ti b t t d
P13-24 (DS2) - P13-23 (DSG) L-B - GR Back door fully open 0V
Back door fully closed and A or B switch turned ON 0V
B -
P14-1 (BD+) - Body ground Back door in opening operation 10 to 14 V
Body ground
Back door fully open 0V
Back door fully open and A or B switch turned ON 0V
W -
P14-3 (BD-) - Body ground Back door in closing operation 10 to 14 V
Body ground
Back door fully closed 0V
Back door fully open and A or B switch turned ON 0V
P -
P14-7 (CL+) - Body ground Back door in closing operation Alternating between 10 to 14 V and 0 V
Body ground
Back door fully closed 0V
Back door fully closed and A or B switch turned ON 0V
O-
P14-6 (CL-) - Body ground Back door in opening operation Alternating between 10 to 14 V and 0 V
Body ground
Back door fully open 0V
*1 Satellite switch (Back door)
*2 Transmitter switch (Back door)
*3 When all the conditions listed below are met, the warning buzzer sounds.
S Ignition switch is turned ON
S Shift lever is moved into any position except P position
S Back door is open or power back door system is activated to open
* 4 When any condition listed below is met, the warning buzzer turns off.
S Shift lever is moved into P position
S Back door is fully closed
HINT:
Use an oscilloscope to check the output voltages of the power back door main switch, buzzer and pulse sen-
sor.
If the result is not as specified, the ECU may have a malfunction.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1943
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