6-1-136 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 ENGINE)
DTC P1510 ECM Back-Up Power Supply Malfunction
WIRING DIAGRAM
CIRCUIT DESCRIPTION
Battery voltage is translated to 5 V in ECM (PCM) back-up circuit. The voltage is supplied to keep DTC memory,
values that ECM (PCM) has learned to control engine, etc. in ECM (PCM) even when ignition switch is turned
OFF.
DTC DETECTING CONDITION AND TROUBLE AREA
DTC CONFIRMATION PROCEDURE
1) With ignition switch OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC by using scan tool if any.
3) Start engine and run it for 10 sec.
4) Check DTC by using scan tool.
[A] : Terminal arrangement of ECM (PCM) coupler viewed from harness side
1. “RADIO DOME” fuse
DTC DETECTING CONDITION
TROUBLE AREA
Back-up circuit voltage is out of specification.
Battery voltage supply circuit
ECM (PCM)
NOTE:
Check to make sure that following conditions are satisfied when using this DTC CONFIRMATION PRO-
CEDURE.
• Intake air temperature : between –14°C and 70°C (6.8°F and 158°F)
• Atmospheric pressure : higher than 560 mmHg (Altitude : lower than 2790 m (9150 ft))
Содержание Engine 2002 GRAND VITARA SQ625
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