Suzuki Baleno Manual page 1689

A-3 MALFUNCTION INDICATOR LAMP ("CHECK ENGINE" LIGHT) CIRCUIT
CHECK
("CHECK ENGINE" LIGHT DOESN'T FLASH OR JUST REMAINS ON EVEN WITH SERVICE WIRE
CONNECTED TO DIAGNOSIS SWITCH TERMINAL AND GROUND TERMINAL.)
1. Battery positive voltage
2. Main fuse
3. Ignition switch
4. "IG" fuse in J/B
5. Malfunction indicator lamp
("CHECK ENGINE" light)
6. Combination meter
7. ECM (PCM)
8. Diagnosis switch terminal
9. Diagnosis connector-1
10. Relay/fuse box
STEP
1) Disconnect ECM (PCM) couplers with ignition switch
turned OFF.
1
2) Does malfunction indicator lamp ("CHECK ENGINE"
light) turn ON at ignition switch ON?
Is coupler connected "A" (terminal "A1") connected to ECM
2
(PCM) properly?
1) Using service wire, ground terminal "A1" with coupler
connected to ECM (PCM).
3 2) Does malfunction indicator lamp ("CHECK ENGINE"
light) flash at ignition switch ON?
Fig. for STEP 3
ELECTRONIC FUEL INJECTION SYSTEM (G13/G16 ENGINE WITHOUT WU TWC) 6E1-25
ACTION
1. ECM (PCM) coupler disconnected
2. Body ground
3. Service wire
YES
"V" wire circuit Go to Step 2.
shorted to ground.
Go to Step 3. Poor connection.
D Service wire open Substitute a known-
D "V/Y" wire circuit good ECM (PCM)
open and recheck.
Poor "B" wire
grounding
NO