Brake Interlock System Inspection - Suzuki Swift Sport 2004 Service & Repair Manual

Troubleshooting
Step
1 Check TCM back-up power circuit
1) Disconnect TCM connector with ignition switch OFF.
2) Check for proper connection to TCM at "C34-24"
terminal.
3) If OK, check voltage at terminal "C34-24" of
disconnected TCM connector.
Is it 10 – 14 V?
2 Check TCM power circuit
1) Disconnect TCM connector with ignition switch OFF.
2) Check for proper connection to TCM at "C34-6" terminal.
3) If OK, turn ignition switch ON and check voltage at
terminal "C34-6" of disconnected TCM connector.
Is it 10 – 14 V?
3 Check A/T relay operation
1) Check A/T relay operation referring to "A/T Relay
Inspection".
Is check result satisfactory?
4 Check TCM ground circuit
1) Turn ignition switch OFF.
2) With TCM connectors disconnected, check for proper
connection to TCM at "C34-1" / "C34-23" terminal.
3) If OK, check resistance between "C34-1" / "C34-23"
terminal of disconnected TCM connector and body
ground.
Is continuity indicated?

Brake Interlock System Inspection

1) Check that select lever cannot be moved to any
other range from "P" range position when ignition
switch key is at ACC position, at LOCK position or it
is removed from keyhole of ignition switch, or brake
pedal is not depressed.
Action
S7RS0B5104047
I4RS0A510047-01
Automatic Transmission/Transaxle:
Yes
Go to Step 2.
Go to Step 4.
"YEL/BLK", "YEL/BLU",
"LT GRN/BLK" or "BLK"
circuit for power supply
open.
TCM power and ground
circuits are in good
condition.
2) Shift select lever to "P" range position, release knob
button and check for the following.
• Ignition key can be turned between LOCK and
ACC positions back and forth and also it can be
removed from ignition switch.
5A-87
No
"WHT/RED" circuit open
or shorted to ground.
Go to Step 3.
Replace A/T relay.
"BLK" circuit for TCM
ground open.
I4RS0A510048-01