Suzuki Wagon R Manual page 3553

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8G-2 IMMOBILIZER CONTROL SYSTEM (G10/M13 ENGINE MODELS)

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)

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 its coil antenna from ignition key.

2) Immobilizer control module compares FC read in step 1 and that registered in immobilizer control module

and checks if they match.

3) ECM sends variable (generated randomly) to transponder via immobilizer control module, and then ECM

calculates it with SECRET KEY (SKC) stored in its memory according to specified algorithm. On the other

hand, transponder also calculates received variable with SKC stored in memory by means of same algo-

rithm 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

Wiring Circuit for M13 Engine Model

3. FI fuse (20 A)

4. Ignition switch

5. Main relay

General Description

6. DOME RADIO fuse (15 A)

7. STOP fuse (15 A)

8. IG COIL fuse (15 A)

9. METER fuse (10 A)

10. Immobilizer indicator lamp

11. Data link connector (DLC)

12. Immobilizer Control Module

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