Suzuki Wagon R Manual page 3565

8G3-2 IMMOBILIZER CONTROL SYSTEM (Z13DT ENGINE MODEL)
Components
The immobilizer control system designed to prevent vehicle burglar and it consists of following components.
• Engine Control Module (ECM)
• Immobilizer Control Module (with coil antenna)
• Ignition key (with built-in transponder)
Operations
1) Each ignition key has its own FIX CODE (FC) stored in memory. When the ignition switch is turned to ON (II)
position, Immobilizer Control Module reads the FC through this coil antenna from ignition key switch.
2) Immobilizer Control Module compares FC read in Step 1 and that registered in Immobilizer Control Module.
Then, it checks if they match.
3) ECM sends variable (generated randomly) to transponder via Immobilizer Control Module and calculates it
with SECRET KEY CODE (SKC) stored in its memory according to specified algorithm.
On the other hand, transponder also calculates received variable with SKC stored in its memory by means of
same algorithm and sends back to ECM.
4) Only when ECM/transponder calculated values match, ECM keeps running engine.
If two calculated values do not match, ECM stops operation of injectors and ignitor to stop engine after about
1.8 seconds at the first time. After the second time, ECM does not let engine start. And, so it does when FIX
CODEs in Step 2 do not match.
Wiring Circuit
BLK/YEL
3 2
2
1
1. Battery
2. Fuse
3. FI fuse (20 A)
4. Ignition switch
5. Main relay
General Description
5
4
9
BLK/RED
8
BLK/WHT
7
6
2
6. DOME RADIO fuse (15 A)
7. STOP fuse (15 A)
8. IG COIL fuse (15 A)
9. METER fuse (10 A)
10. Service vehicle soon (SVS) lamp
G88-4
G88-5
BLK/RED
G88-6
BLU/BLK G88-80
10
G88-77
GRY/RED
G88-23
G88-88
WHT
G17-7
G17-5
G17-2
GRY/RED
GRN/RED G17-9
WHT/BLU G09-16
G09-5
BRN
11. Data link connector (DLC)
12. Immobilizer Control Module
13. ECM
13
G88-1 BRN
G88-2 BRN
G88-3 BRN
12
G17-4
BLK
G17-6
WHT/RED
11
G09-7
G09-4