Dtc P1510: Ecm Back-Up Power Supply Malfunction - Suzuki SX4 Service Manual

DTC P1510: ECM Back-Up Power Supply Malfunction

Wiring Diagram
3
80A 50A
15 14 13 12 11
30 29 28 27 26
44
45 43 42 41
60 59 58 57 56
1. ECM
Circuit Description
Battery voltage is supplied so that DTC memory, values for engine control learned by ECM, etc. are kept in ECM even
when the ignition switch is turned OFF.
DTC Detecting Condition and Trouble Area
Back-up power circuit voltage is less than specified value for 5 seconds while engine
is running.
(1 driving cycle detection logic)
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.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions for DTC Troubleshooting".
Step
1 Was "Engine and Emission Control System Check"
performed?
WHT
E01
10 9 8 7 6 5 4 3
25 24 23 22 21 20 19 18
40 39 38 37 36 35 34 33
55 54 53 52 51 50 49 48
2. "DOME" fuse
DTC detecting condition
Action
Engine General Information and Diagnosis:
WHT/RED
2
2 1 15 14 13 12 11
17 16 30 29 28 27 26
44
32 31 45 43 42 41
47 46 60 59 58 57 56
Go to Step 2.
1
E01-2
C01
10 9 8 7 6 5 4 3
25 24 23 22 21 20 19 18
40 39 38 37 36 35 34 33
55 54 53 52 51 50 49 48
3. Main fuse box
Trouble area
Battery voltage supply circuit
Yes
Go to "Engine and
Emission Control
System Check".
1A-143
S7RW0A1104058
2 1
17 16
32 31
47 46
I6RW0D110046-02
No