Suzuki GRAND VITARA Owner's Manual page 1717

Description
The keyless start control module detects DTC by using signals from the key reminder and driver side door request
switches. The keyless start control module makes the key indicator lamp in the combination meter flash on and off by
using CAN communication.
Troubleshooting
Step
1 Combination meter power and ground circuit check
1) Turn ignition switch to ON position.
Do warning lamps in combination meter other than key
indicator lamp light up?
2 Driver side door request switch and its circuit check
1) Check driver side door request switch and its circuit
referring to "DTC No. 51 / No. 52 / No. 53: Driver Side /
Passenger Side / Rear End Door Request Switch
Failure: ".
Is it in good condition?
3 Key reminder switch and its circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connector from ignition switch.
3) Check key reminder switch for operation referring to
"Ignition Switch Inspection: in Section 9C".
4) If OK, check for open, short and high resistance in key
reminder switch circuit.
Is it in good condition?
4 Keyless start control module power supply and ground
circuit
1) Check keyless start control module power and ground
circuit for condition referring to "Keyless Start Control
Module Power and Ground Circuit Check: ".
Is it in good condition?
5 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules
communicating by means of CAN.
3) Check CAN communication circuit between control
modules for open, short and high resistance.
Is each CAN communication circuit in good condition?
Action
Keyless Start System:
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Go to Step 5.
Substitute a known-
good keyless start
control module and
recheck.
10E-20
No
Check main fuse, circuit
fuse, combination meter
power and ground
circuit.
Repair or replace
malfunction part.
Repair or replace
malfunction part.
Repair circuit.
Repair circuit.