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 cip1600
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DI-132
DIAGNOSTICS - ENGINE
DI6VN-04
DTC P1600 ECM BATT Malfunction
CIRCUIT DESCRIPTION
Battery positive voltage is supplied to terminal BATT of the ECM even when the ignition switch is OFF for
use by the DTC memory and air-fuel ratio adaptive control value memory, etc.
DTC No. DTC Detecting Condition Trouble Area
S Open in back up power source circuit
P1600 Open in back up power source circuit
S ECM
HINT:
If DTC P1600 appear, the ECM does not store another DTC.
WIRING DIAGRAM
ECM
13 1
B-Y B-Y B-Y BATT
ID3 E4
1 Engine Room
1 Engine Room R/B No. 1
R/B No. 1
5 1
2
EFI
EFI Relay
1 3 2
1
B-L
F6 2
Fusible
MAIN Link Block
Battery
A09061
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining
whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel ratio lean or rich, etc.
at the time of the malfunction.
2002 ECHO (RM884U)
Author : Date : 302
DI-133
DIAGNOSTICS - ENGINE
1 Check voltage between terminal BATT of ECM connector and body ground.
LOCK PREPARATION:
BATT
Remove the connector cover from the ECM.
CHECK:
Measure voltage between terminal BATT of the ECM connector
and body ground.
OK:
(-) (+) Voltage 9 - 14 V
A09050 OK Check and replace ECM (See page IN-29 ).
NG
2 Check EFI fuse.
Engine Room R/B No. 1 PREPARATION:
Remove the EFI fuse from the engine room J/B.
CHECK:
Check continuity of EFI fuse.
OK:
Continuity
NG Check for short in all the harness and
EFI Fuse B07780
components connected to EFI fuse.
OK
Check and repair harness or connector
between battery and EFI fuse and ECM
(See page IN-29 ).
2002 ECHO (RM884U)
Author : Date : 303
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