Mazda MX-6 1998, Workshop Manual

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SECURITY AND LOCKS
PCM Replacement
When customer does not have valid key
• Immobilizer unit needs to be replaced with PCM. Perform “Both Immobilizer unit and PCM Replacement” of
the IMMOBILIZER SYSTEM REPROGRAM PROCEDURE.
When customer has brought two or more valid keys
VALID KEYS <
KE
VALID OR
NEW KEY
KEY 3
W 6 U 9 1 4 W 8 2
Note
• If no specific time interval is given, step should be performed within 30 seconds of the previous step.
1. Cut new transponder equipped key(s) if necessary.
2. Replace PCM. (Refer to 01-40A PCM REMOVAL/INSTALLATION [FS].) (Refer to 01-40B PCM
REMOVAL/INSTALLATION [KL].)
3. Using key 1, turn ignition switch to ON, and observe security light illumination (for 1— 2 seconds) in
instrument panel.
(1) Turn key 1 to LOCK.
(2) Turn key 1 to ON then back to LOCK
six times. Key should not remain ON or LOCK for more than one
second. It is particularly important to ensure that the 6th turning is done within 1 second.
(3) Remove key 1.
4. Using key 2, turn ignition switch to ON. Observe security light illumination (for 1— 2 seconds).
(1) Turn key 2 to LOCK and remove from steering lock.
5. Using key 1, start engine. Observe security light illumination (for 1—2 seconds) and engine continues to run.
(1) Turn key 1 to LOCK and remove from steering lock.
6. Repeat step 5 with key 3.
7. If there are 4— 8 keys (valid and/or new keys), repeat step 5.
8. Wait for 30 seconds to quit reprogram mode.
9. After reprogramming, clear DTCs of PCM with NGS.
When customer has brought only one valid key (code word is required)
NEW KEYS <
? KEY 1
VALID KEY
KEY 3
3
KEY 2
W 6 U 9 1 4 W B 3
Note
• If no specific time interval is given, step should be performed within 30 seconds of the previous step.
1. Cut new transponder equipped key(s) if necessary.
2. Replace PCM. (Refer to 01-40A PCM REMOVAL/INSTALLATION [FS].) (Refer to 01-40B PCM
REMOVAL/INSTALLATION [KL].)
3. Using key 1, turn ignition switch to ON. Observe security light illumination (for 1— 2 seconds) in instrument
panel.
(1) Turn key 1 to LOCK and remove from steering lock.
4. Using key 2, turn ignition switch to ON then back to LOCK six times. Key should not remain ON or LOCK for
more than one second. It is particularly important to ensure that the 6th turning is done within 1 second.
0 9 -1 4 -2 1