Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 21q2h73z b1795
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05-1097
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM 05IX0-05
DTC B1795 OCCUPANT CLASSIFICATION ECU
MALFUNCTION
CIRCUIT DESCRIPTION
DTC B1795 is recorded when a malfunction is detected in the occupant classification ECU.
Troubleshoot DTC B1771 first when the DTC B1771 and B1795 are output simultaneously.
DTC No. DTC Detecting Condition Trouble Area
S Occupant classification ECU circuit malfunction
S The occupant classification ECU receives a short to S Front seat wire RH
B1795 ground signal in the passenger side buckle switch circuit S Front seat inner belt assy RH (Buckle switch RH)
for 2 seconds. S Occupant classification ECU
S Occupant classification ECU malfunction
HINT:
When DTC B1150/23 is detected as a result of troubleshooting for the supplemental restraint system, per-
form troubleshooting for DTC B1795 of the occupant classification system.
INSPECTION PROCEDURE
1 CHECK DTC
(a) Turn the ignition switch to the ON position, and wait for at least 10 seconds.
(b) Using the hand-held tester, check the DTCs (see page 05-777 ).
Result:
A: DTC B1795 is output.
B: DTC B1771 and B1795 are output.
HINT:
Codes other than codes B1771 and B1795 may be output at this time, but they are not related to this check.
B GO TO DTC B1771 (SEE PAGE 05-1032 )
A
2 CHECK FUSE
(a) Check the ECU-B fuse.
Standard: Below 1
NG REPLACE FUSE
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1280
05-1098
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 CHECK WIRE HARNESS(SOURCE VOLTAGE)
(a) Turn the ignition switch to the LOCK position.
O3 (b) Disconnect the negative (-) terminal cable from the bat-
+B GND tery, and wait for at least 90 seconds.
(c) Disconnect the "O6" connector from the occupant classifi-
cation ECU.
(d) Connect the negative (-) terminal cable to the battery.
(e) Turn the ignition switch to the ON position.
(f) Measure the voltage and resistance according to the val-
H43112 ue(s) in the table below.
Standard:
Tester connection Condition Specified condition
O3-1 (+B) - Body ground Ignition switch ON 10 to 14 V
O3-3 (GND) -
Always Below 1
Body ground
NG REPAIR OR REPLACE WIRE HARNESS OR
BATTERY
OK
4 REPLACE OCCUPANT CLASSIFICATION ECU
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Replace the occupant classification ECU (see page 60-67 ).
NEXT
5 PERFORM ZERO POINT CALIBRATION
(a) Connect the negative (-) terminal cable to the battery.
(b) Connect the hand-held tester to the DLC3.
(c) Turn the ignition switch to the ON position.
(d) Using the hand-held tester, perform "Zero point calibration" (see page 05-767 ).
OK:
The "COMPLETED" is displayed.
NEXT
6 PERFORM SENSITIVITY CHECK
(a) Using the hand-held tester, perform "Sensitivity check" (see page 05-767 ).
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
NEXT
END
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1281
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