Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota 4Runner 1996-2003 Approved SIL techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 024runne di eg5vzfe cip1600
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DI-141
DIAGNOSTICS - ENGINE (5VZ-FE)
DI0SG-1 1
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
Engine Room R/B
7 16
EFI L-R L-R BATT
W
2 2 IG1 E14
1 2
Battery
A03375
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the 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 deter-
mining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was
lean or rich, etc. at the time of the malfunction.
2002 4RUNNER (RM887U)
Author : Date : 317
DI-142
DIAGNOSTICS - ENGINE (5VZ-FE)
1 Check voltage between terminal BATT of ECM connector and body ground.
PREPARATION:
LOCK
Remove the glove compartment (See page SF-54 ).
BATT CHECK:
Measure the voltage between terminal BATT of the ECM con-
nector and body ground.
OK:
(-) (+) Voltage: 9 - 14 V
A15323 OK Check and replace ECM (See page IN-28 ).
NG
2 Check EFI fuse.
Engine Room R/B PREPARATION:
Remove the EFI fuse from the engine room R/B.
CHECK:
Check the continuity of the EFI fuse.
OK:
Continuity
EFI Fuse
NG Check for short in all harness and components
A15318
connected to EFI fuse.
OK
Check and repair harness or connector be-
tween battery and EFI fuse, and EFI fuse and
ECM.
2002 4RUNNER (RM887U)
Author : Date : 318
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