Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm di eg ecmpower
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DI-138
DIAGNOSTICS - ENGINE
DI6VQ-02
ECM Power Source Circuit
CIRCUIT DESCRIPTION
When the ignition switch is turned ON, battery positive voltage is applied to the coil, closing the contacts of
the EFI relay (Making: EFI) and supplying power to the terminal +B of the ECM.
WIRING DIAGRAM
I10 Instrument
Ignition Panel J/B
Switch
6 3
W-R B-R 1O B-R
1A
5 AM1 IG2 6
1O 1
ECM
Instrument
Panel J/B
B-Y
1A 7
W-R
1 1 Engine Room 1 1
R/B No. 1
2 2 1 5
AM2 EFI EFI Engine Room
Relay R/B No. 1
1 1
2 3
Instrument
1 1 1 Panel J/B
B-L B-Y 11 8 12
F6 2 1A 1H B-R E4 +B
Fusible
MAIN Link Block W-B
14
BR
E7 E1
Battery
EC EB
A09140
2002 ECHO (RM884U)
Author : Date : 308
DI-139
DIAGNOSTICS - ENGINE
INSPECTION PROCEDURE
1 Check voltage between terminals + B and E1 of ECM connector.
ON PREPARATION:
E1 +B (a) Remove the connector cover from the ECM.
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals + B and E1 of the ECM
connector.
OK:
(-) (+) Voltage: 9 - 14 V
A09046
OK Proceed to next circuit inspection shown on
Problem symptoms table (See page DI-21 ).
NG
2 Check for open in harness and connector between terminal E1 of ECM and body
ground (See page IN-29 ).
NG Repair or replace harness or connector.
OK
3 Check EFI relay (Marking: EFI) (See page SF-47 ).
NG Replace EFI relay.
OK
2002 ECHO (RM884U)
Author : Date : 309
DI-140
DIAGNOSTICS - ENGINE
4 Check EFI fuse.
Engine Room J/B PREPARATION:
Remove IGN fuse from engine room J/B.
CHECK:
Check continuity of EFI No. 1 fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
EFI Fuse B07780
nents connected to EFI fuse.
OK
5 Check for open in harness and connector between EFI relay (Marking: EFI) and
battery, EFI relay (Marking: EFI) and ECM (See page IN-29 ).
NG Repair or replace harness or connector.
OK
6 Check ignition switch (See page BE-15 ).
NG Replace ignition switch.
OK
Check for open in harness and connector be-
tween IG switch and EFI relay and body
ground (See page IN-29 ).
2002 ECHO (RM884U)
Author : Date : 310
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