Suzuki GRAND VITARA XL-7 Owner's Manual page 432

Table B-2 : "O/D OFF" Light Circuit Check ("O/D OFF" Light Comes ON
Steadily)
WIRING DIAGRAM
Refer to "TABLE B-1" in this section.
TROUBLESHOOTING
Step
1 Check O/D off switch status.
Press O/D off switch button (1).
Does "O/D OFF" lamp come ON steadily?
2 Check lamp circuit for short.
1) Turn ignition switch OFF and disconnect
PCM connectors.
2) Turn ignition switch ON.
Does "O/D OFF" lamp come ON steadily?
3 Check O/D off switch circuit.
1) Check resistance between terminal E61-33
of disconnected PCM connector and body
ground with O/D off switch button (1)
released.
Is continuity indicated?
4 Check O/D off switch for operation.
1) Remove console box.
2) Disconnect O/D off switch connector.
3) Check continuity between switch terminals
under each condition below.
O/D switch operation
With O/D off switch button (1) released :
No continuity
With O/D off switch button (1) pressed :
Continuity
Is check result satisfactory?
[A] for Step 1/[B] for Step 4
Action
AUTOMATIC TRANSMISSION (4 A/T) 7B1-23
Yes
Go to Step 2.
"WHT/BLK" circuit
shorted to ground.
Go to Step 4.
"YEL/RED" circuit shorted
to ground.
No
System is OK.
Go to Step 3.
Check PCM ground circuit
for open.
If ground circuit is OK,
substitute a known-good
PCM and recheck.
Replace O/D off switch.