Transmission Warning Light Circuit Check - Suzuki Swift Sport 2004 Service & Repair Manual

Step
1 Was "A/T System Check" performed?
2 Check DTC
Is DTC P0705, P0707, P0712, P0713, P0717, P0722,
P0787, P0788, P0961, P0962, P0963, P0973, P0974,
P0976, P0977, P1702, P1703, P1774, P1777, P2762,
P2763 and/or P2764 detected?
3 Brake light switch signal inspection
1) With ignition switch turned ON, check voltage between
terminal "C35-20" of ECM connector and ground.
Brake light switch signal specification
Brake pedal is released: 0 – 1 V
Brake pedal is depressed: 8 – 14 V
Is result as specified?
Transmission Warning Light Circuit Check – Light Does Not Come "ON" at Ignition Switch ON
Troubleshooting
Step
1 Combination meter power supply check
1) Turn ignition switch ON.
Does other indicator / warning lights in combination meter
comes ON?
2 TCM power and ground circuit check
1) Check referring to "TCM Power and Ground Circuit
Check".
Is it in good condition?
3 DTC check
1) Check DTC referring to "DTC Check".
Is there DTC P1774?
4 Combination meter function check
1) Turn ignition switch ON.
Does A/T selector position indicator show correct select
lever position?
Transmission Warning Light Circuit Check – Light Remains "ON" at Ignition Switch ON
Troubleshooting
Step
1 Diagnostic Trouble Code (DTC) Check
1) Check DTC referring to "DTC Check".
Is there any DTC(s)?
Action
Action
Action
Automatic Transmission/Transaxle:
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
Substitute a known-
good TCM and recheck.
Yes
Go to Step 2.
Go to Step 3.
Go to applicable DTC
diag. flow.
Replace combination
meter.
Yes
Perform DTC Flow to
repair and retry.
5A-43
No
Go to "A/T System
Check".
Go to Step 3.
Mis-adjusted brake light
switch or faulty brake
light switch.
S7RS0B5104021
No
Repair combination
meter power supply
circuit referring to "C-1
Combination Meter
Circuit Diagram (Meter)
in Section 9A".
Repair or replace.
Go to Step 4.
Substitute a known-
good TCM and recheck.
S7RS0B5104022
No
Substitute a known-
good TCM and recheck.
If OK, substitute a
known-good
combination meter and
recheck.