Suzuki Wagon R Manual page 3043

6-2-144 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
DTC P1510 ECM Back-up Power Supply Malfunction
Wiring Diagram
3
60A
80A
E23
7 6 5 4
17 16 15 14 13 12
27 26 25 24 23 22
34 33 32
1. ECM
2. "DOME RADIO" fuse
3. Relay box
Circuit Description
Battery voltage is supplied so that diagnostic trouble code 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
DTC Detecting Condition
Back-up circuit voltage is less than specified value 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.
WHT
E22
3 2 1 7 6 5 4 3
11 10 9 8 19 18 17 16 15 14 13 12
21 20 19 18 27 26 25 24
31 30 29 28 35 34 33 32
2
E21
2 1 6 5 4 3
11 10 9 8 16 15 14 13 12 11 10 9
23 22 21 20 27 26 25 24 23 22 21 20
31 30 29 28 35 34 33 32 31
Battery voltage supply circuit
1
WHT/BLU E21-16
2 1
7
8
19 18 17
30 29 28
Trouble Area