Suzuki sq-416-420-625 Service Manual page 439

DIAGNOSTIC FLOW TABLE B-3
WIRING DIAGRAM
G16 / J20 Engines
H25 Engine
TROUBLESHOOTING
STEP
1 "POWER" light circuit check:
(1) With ignition switch OFF, disconnect
couplers from PCM.
(2) Using service wire, connect E61-21 (G16/
J20 engines) or E61-10 (H25 engine)
terminal of disconnected PCM coupler and
ground.
Does "POWER" light turn ON at ignition switch
ON?
"POWER" LIGHT CIRCUIT CHECK
("POWER" LIGHT DOESN'T LIGHT AT IGNITION SWITCH ON BUT
ENGINE STARTS UP)
ACTION
AUTOMATIC TRANSMISSION (4 A / T) 7B1-37
YES
Poor E61-21 (G16/J20
engines) or E61-10 (H25
engine) terminal
connection.
If OK, substitute a known-
good PCM and recheck.
1. PCM
2. J / B
3. O / D cut switch
4. P / N change switch
5. J / C
1. PCM
2. Fuse
3. O / D cut switch
4. P / N change switch
5. J / C
6. J / C
NO
Bulb burned out or faulty
"Gr/Bl", "B/W" wire.