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DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
Back-up circuit voltage is less than 5 V for 5 seconds
continuously while engine running.
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC using scan tool and run engine at idle speed for 1 min.
3) Check DTC and pending DTC.
TROUBLESHOOTING
Step
1
Was "Engine and Emission Control System
Check" performed?
2
Battery voltage supply circuit check
1) Disconnect connectors from ECM with igni-
tion switch turned OFF.
2) Remove ECM from vehicle body and then
connect connectors to ECM.
3) While engine running, check voltage
between "G91-16" and ground.
Is voltage 10 – 14 V?
Action
ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-167
TROUBLE AREA
Battery voltage supply circuit
Yes
Go to Step 2.
Poor "G91-16" connec-
tion or intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection" in
Section 0A.
If wire and connections
are OK, substitute a
known-good ECM and
recheck.
No
Go to "Engine and Emis-
sion Control System
Check".
"RADIO DOME" fuse
blown "WHT/RED" circuit
open or short.
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