Kia Carens. Manual — part 304

Schematic diagram

PIN

Description

PIN

Description

2a

REAR DEF S/W

1a

Coil (+)

2b

GND

1b

NC (Not connected)

2c

IMMO indicator

1c

Coil (-)

2d

Serial communication(diagnosis)

2f

ECM ECU

2h

Horn

2l

B (+)

2j

(+) IG1

1) While performing a coding procedure, the period of ON and OFF must maintain approximately two seconds in

order to confirmed communication time between ICU and ECU.

2) After completing to perform a coding procedure, if engine does not start in spite that "IMMO" indicator is normal,

disconnect the antenna coil connector from the ICU and then perform a limphome procedure. In case of observing
that "IMMO" indicator is normal, the ICU is normal. So, check for ECU including the starting system.

3) After a neutralization or replacement of ICU, must perform "Normal Coding" procedure with the original correct

PIN.

4) When performing a "Key Only Matching" procedure, must code key one by one.
5) With the ignition switch ON, perform a limphome procedure through a "IMMO" indicator by RR. DEF switch. If

succeed, "IMMO" indicator blinks from 2Hz to 0.5Hz. If not, "IMMO" indicator goes out.

6) If a limphome procedure is succeed, must turn the ignition switch to OFF and then start engine within 20 seconds.
7) After performing neutralization, must turn the ignition switch OFF and ON.
8) In case of virgin ICU, the Key Only Matching service is not allowed.

2001 > 1.8L DOHC >

Diagnostic function

The diagnostic communication is initiated by an external diagnostic tool (Hi-Scan Pro). Its purpose is to:

• Perform an end-of-line test at the car assembly plant consisting of:
• Programming the PIN
• Matching the ECM to the ICU
• Matching the transponder keys
• doing a complete check of the system
• Program a replacement ECM or ICU (neutralization)
• Program replacement keys

Diagnostic service

Refer to Hi-Scan Pro Tool Manual.

• Normal coding
• Neutralization
• Code change
• key only matching
• VIM check
• ECM check

Passcode (or PIN) request

This service is used to enter the PIN.

Test sequence request

This frame is sent immediately after the Passcode frame and starts a test sequence either with or without transponder
key matching. If the test sequence request is not received before the end of the time-out, the ICU sends a response
frame containing ＄FF FF as status.

This service can be allowed only when the ICU status is not learnt by setting an EEPROM in case of learnt status,
the sequence is not processed and the PIN is not changed.

Consider a virgin ICU. By performing a full test sequence:

• either without key matching,
• or with key matching,

the ICU becomes learnt, and unlocked. The ICU will remain unlocked while the ignition ON. However, if a full test
sequence is performed with key matching (and two keys are matched : the sequence was successful), then the ICU is
learnt and unlocked, but a passive arming is armed. In that case, once the passive arming is elapsed, or if ignition is ON
with an unknown key, the ICU is locked.

Key management

In case of key matching (from a full test sequence or a key matching only).

• no key is learnt : the previous keys are kept
• at least 1key is learnt : the previous keys are erased, and replaced by the new ones.

Case of virgin ICU

In virgin status the key matching service is not allowed.

DIAGNOSTIC SEQUENCE

1. The operation inserts a transponder key.

2. The test tool sends the PIN with option full test (program PIN) and a diagnostic request to the ICU.

3. The PIN is programmed and the ICU status changes to learnt

4. The ICU activates the horn for 50ms (Parameter 1)

5. The operator turns the key to IG ON position

6. The ICU communicates with the ECM and unlocks it.

7. The operator turns the key to IG OFF position.

8. The operator depresses theRR DEF SE for 500ms minimum.

9. The horn sounds for 50ms.

10. The operator turns the key to IG ON position

11. The first transponder key is learned.

12. If the programming was OK, The lamp is ON for 250ms.

13. The operator starts the engine.

14. The operator turns the key to IG OFF position and replaces it by the second key in less than 10 seconds

15. The operator turns the key to IG ON position.

16. The second transponder key is learned

17. If the programming was OK, the lamp is ON for 250ms and the horn is activated for 50ms (Parameter 1)

18. The operator starts the engine.

19. The operator turns the key to IG OFF position.

20. 20. The status of the ICU is sent to the test tool (Hi-Scan Pro Tool).

Transponder key matching only

Transponder matching sequence : this procedure corresponds to matching keys procedure

1. The operator inserts a transponder key

2. The test tool sends the PIN to the ICU with option transponder matching and the number of keys to be programmed.

3. The ICU activates the horn for 50ms.

4. The operator turns the key to IG ON position

5. The first transponder key is learnt.

6. The lamp lights

7. The operator turns the key to IG OFF position and replaces it by the next key

8. The operator turns the key to IG ON position

9. The second transponder key is learned

10. The almp lights

11. Step 7 to 10 are repeated depending on the number of keys to be programmed

12. The status of the ICU is sent to the test tool.

Also, during the ignition test, the VIM detects the ECM type connected to it and stores the type in EEPROM.

ECM (or ECU) communication

The ECM communication is initiated by the ECM. The ICU decrypts this request to get three bytes of fix code; it
compares this fix code with ICU's MIN. If they are different or if the ICU is in the locked condition, ICU answers ECM with
dummydata. Otherwise, the answer is got from encrypted different code according the ICU status.
The ECM type is extracted front the ECM request and stored in EEPROM of ICU.

Relay communication

This function allows the communication between tester and ECM by shorting W-line and K-line together.
The ICU controls a relay, which permits to connect the K (Diagnostic)-line with the W (ECM serial data)-line and
disconnect the internal W-line pull-up, to allow communication between the ECM and an external tester.
If the ICU recognizes at falling edge on the K-line, with a low level lasting more than 10ms, it will close the relay and then
disable the pull-up.
If the request is a 5 bauds wake-up addressed to the ICU, or if the K-line is seen idle for 10 seconds or a falling edge ON
ignition input appaers, the pull-up is re-enabled and then the relay is released.

In key immobilizer

The product described in these specifications is a transponder-based immobilizer for vehicle. This product called
ICU(Inkey Control Unit) communicates with the engine management system in order to allow or not the engine start
depending therecognition or not of the transponder inserted in the key. This product complies with European directives
applicable inanti-theft systems for vehicles. The transpoder inserted in the key; two key are associated to vehicle. The
identification of a transponder by the ICU is done by reading-by magnetic coupling-the identifier code engraved on the
transponder identifier puts the ICU in an unlocked state until a falling edgd in ignition input; otherwise, it is in the locked