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DI-583
DIAGNOSTICS - CRUISE CONTROL SYSTEM
DI08R-24
DTC 32 Control Switch Circuit (Cruise Control
Switch)
CIRCUIT DESCRIPTION
This circuit carries the SET/COAST, RESUME/ACCEL and CANCEL signals (each voltage) to the ECU.
DTC No. Detection Item Trouble Area
S Cruise control switch
S Harness or connector between cruise control ECU and
32 Short in control switch circuit.
cruise control switch, cruise control switch and body ground
S Cruise control ECU
WIRING DIAGRAM
Cruise Control ECU
10
C13 W
C15 CCS
Cruise Control SW 5
CCS
RES/ACC
SET/COAST
ECC
4
CANCEL
J/B No.3
1
W-B
3B
10 10 16
W-B W-B
3C 3B C15 GND
IG
I19516
2001 SIENNA (RM787U)
Author : Date : 737
DI-584
DIAGNOSTICS - CRUISE CONTROL SYSTEM
INSPECTION PROCEDURE
1 Input signal check.
PREPARATION:
See input signal check on page DI-563 .
Input Signal Indicator Light CHECK:
Blinking Pattern Check the indicator light operation when each of the SET/
2 Pulses COAST, RESUME/ACCEL and CANCEL is turned on.
SET/COAST ON OK:
switch
OFF SET/COAST, RESUME/ACCEL switch
3 Pulses The signals shown in the table on the left should be
RESUME/ACCEL ON
output when each switch is ON. The signal should
switch
OFF disappear when the switch is turned OFF.
SW OFF CANCEL switch
ON
CANCEL switch The indicator light goes off when the cancel switch is
OFF SW ON
turned ON.
OK Wait and see.
NG
2 Check voltage between terminals CCS of cruise control ECU connector and body
ground.
PREPARATION:
ON (a) Remove the ECU with connector still connected.
(b) Turn ignition switch ON.
CHECK:
CCS
Measure voltage between terminal 18 of ECU connector and
body ground, when each of the SET/COAST, RESUME/AC-
CEL and CANCEL is turned ON.
Switch position Resistance (V)
Neutral 10 - 16 V
RES/ACC 0.8 - 3.7 V
(-) (+)
SET/COAST 2.5 - 6.3 V
CANCEL 4.2 - 8.8 V
AB0119
I00168
I00171
NG Proceed to next circuit inspection shown on
problem symptom table (See page DI-572 )
OK
2001 SIENNA (RM787U)
Author : Date : 738
DI-585
DIAGNOSTICS - CRUISE CONTROL SYSTEM
3 Check control switch.
4 3 PREPARATION:
(a) Remove steering wheel center pad.
(b) Disconnect the control switch connector.
CHECK:
Measure resistance between terminals 3 and 4 of control switch
connector when control switch is operated.
Switch position Resistance ()
Neutral (No continuity)
N16045
RES/ACC 50 - 80
SET/COAST 180 - 220
CANCEL 400 - 440
NG Replace control switch.
OK
4 Check harness and connector between cruise control ECU and cruise control switch,
cruise control switch and body ground (See page IN-31 ).
NG Repair or replace harness or connector.
OK
5 Input signal check (See step 1).
OK Wait and see.
NG
Check and replace cruise control ECU (See
page IN-31 ).
2001 SIENNA (RM787U)
Author : Date : 739
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