Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 20dwf cimg4
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05-1541
DIAGNOSTICS - COMBINATION METER 056ED-05
MALFUNCTION IN TACHOMETER
WIRING DIAGRAM
C10
ECM Combination Meter Assy
J19
J/C
5
75 115 37
TACH E4
B-O B-O
30
BR
IF
I35756
INSPECTION PROCEDURE
1 PERFORM ACTIVE TEST BY HAND-HELD TESTER(COMBINATION METER)
(a) Operate the hand-held tester according to the steps on the display and perform the "ACTIVE TEST".
Item Test Details Diagnostic Note
0rpm / 1000rpm / 2000rpm / 3000rpm / 4000rpm /
TACHOMETER -
5000rpm / 6000rpm / 7000
NG CHECK AND REPLACE COMBINATION METER
ASSY
OK
2 READ VALUE OF HAND-HELD TESTER(COMBINATION METER)
(a) Operate the hand-held tester according to the steps on the display and select "DATA LIST".
Item Test Details Diagnostic Note
Almost same at the meter rpm
TACHO METER Engine speed / Min.: 0 rpm, Max.: 12,750 rpm
(When engine is running)
OK CHECK AND REPLACE COMBINATION METER
ASSY
NG
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1724
05-1542
DIAGNOSTICS - COMBINATION METER
3 READ VALUE OF HAND-HELD TESTER(ECM)
(a) Operate the hand-held tester according to the steps on the display and select "DATE LIST".
Item Test Details Diagnostic Note
TACHO METER Engine peed / Min.: 0 rpm, Max.: 12,750 rpm -
NG GO TO ENGINE CONTROL SYSTEM
OK
4 INSPECT COMBINATION METER ASSY
(REFERENCE) INSPECTION USING OSCILLOSCOPE
(a) Check the input signal waveform.
(1) Remove the combination meter assy.
(2) Connect the oscilloscope to the terminals C10-37
and C10-30 of the combination meter connector.
(3) Start the engine.
(4) Check the signal waveform.
C10-37 C10-30 I34622
Item Contents
Tool setting 5 V/ DIV, 10 ms/ DIV
Vehicle condition Engine idle speed
OK CHECK AND REPLACE COMBINATION METER
ASSY
A05138
NG
5 CHECK HARNESS AND CONNECTOR(BETWEEN ECM AND COMBINATION
METER ASSY)
(a) Remove the combination meter assy.
(b) Disconnect the connector from ECM.
(c) Check the continuity between the terminal E4-5 (TACH) of ECM and the terminal C10-37 of the com-
bination meter connector (See Page 05-1535 ).
Standard: Continuity.
OK CHECK AND REPLACE ECM
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1725
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