Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 2021t cip05715
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05-201 1
DIAGNOSTICS - DYNAMIC LASER CRUISE CONTROL SYSTEM 05BE7-02
DTC P0571/52 BRAKE SWITCH "A" CIRCUIT
CIRCUIT DESCRIPTION
When the brake pedal is depressed, the stop lamp switch assy sends a signal to the ECM. When the ECM
receives the signal, it cancels the cruise control.
Even if a malfunction occurs in the stop lamp signal circuit, a normal vehicle operation can be maintained
by the fail-safe function.
The cancel condition occurs when battery positive voltage is supplied to terminal STP.
When the brake pedal is on, battery positive voltage is normally applied through the STOP fuse and the stop
lamp switch assy to terminal STP of the ECM, and the ECM turns the cruise control OFF.
If the harness connected to terminal STP has an open circuit, terminal STP will have battery positive voltage
and the cruise control will be turned OFF.
DTC No. DTC Detection Condition Trouble Area
S The malfunction code is output when the voltage of the STP
terminal and that of the ST1- terminal on the ECM are less
than 1 V for 0.5 sec. or more.
S Stop lamp switch assy
S When the following conditions are realized, a malfunction is
P0571/52 S Stop lamp switch signal circuit
detected.
(c) The STP terminal voltage is less than 1 V. S ECM
(d) The ST1- terminal voltage is less than 1 V.
(e) For more than 0.5 sec. or more.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2194
05-2012
DIAGNOSTICS - DYNAMIC LASER CRUISE CONTROL SYSTEM
WIRING DIAGRAM
S12
Stop Lamp Switch Assy ECM
J/C 2 J/C 19
18 4 12
B-O B-O LG-R LG-R
J6 J5 J3 J4 E5 ST1-
3 4
J15 J2
J/C J/C 20 J/C 3 19
W W G-W G-W J3 G-W
J4 E5 STP
C C 2 1 A A
Driver Side J/B
16 STOP 1
1C 1A 1
I15 Ignition SW E6 E1
30 27 J/C
IGN 16 33
B-O B W-R
1K 1H J4 J3
6 IG2 AM2 5
W-R BR
FL Block Engine Room J/B
1 1 1 AM2 1
W W
F6 F8 2D 2H
1 2
FL MAIN ALT 1
W A
F7
J29
J/C
BR A
Battery
EB
I45856
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2195
05-2013
DIAGNOSTICS - DYNAMIC LASER CRUISE CONTROL SYSTEM
INSPECTION PROCEDURE
1 CHECK STOP LAMP SWITCH OPERATION
(a) Check that the stop lamp lights up when brake pedal is depressed, and goes off when the brake pedal
is released.
NG INSPECT STOP LAMP SWITCH CIRCUIT (See
page 05-1 131)
OK
2 INSPECT STOP LAMP SWITCH ASSY
(a) Disconnect the stop lamp switch assy connector.
2 1
(b) Check the continuity between each terminal of the stop
lamp switch assy.
Standard:
Switch condition Tester connection Specification
4 3 1-2 Below 1
Switch pin free
3-4 10 k or higher
Free Pushed in 1-2 10 k or higher
Switch pin pushed in
E65594
3-4 Below 1
NG REPLACE STOP LAMP SWITCH ASSY
OK
3 INSPECT ECM
(a) Remove the ECM with connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage between terminal STP (E5-19) and
E6 E5 E1 (E6-1) of ECM connector when the brake pedal is de-
pressed and released.
Standard:
Condition Voltage
E1 STP Depressed 10 to 14 V
I34219
Released Below 1 V
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2196
05-2014
DIAGNOSTICS - DYNAMIC LASER CRUISE CONTROL SYSTEM
(d) Measure the voltage between terminal ST1- (E5-12) and
E1 (E6-1) of ECM connector when the brake pedal is de-
pressed and released.
E6 E5
Standard:
Condition Voltage
Depressed Below 1 V
Released 10 to 14 V
E1 ST1-
I34219
OK REPLACE ECM (See page 10-17 )
NG
REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2197
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