Mazda 2006 MX-5 - Starter Cut-Off Control Block Diagram [Lf]; Starter Cut-Off Control Operation [Lf]; Starter Cut-Off Control Outline [Lf]

CONTROL SYSTEM
01–40–36
STARTER CUT-OFF CONTROL OUTLINE [LF]
E5U014000000N49
• Theft deterrence has been improved by controlling energization to the starter relay according to an engine stop
request signal from the immobilizer system.
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STARTER CUT-OFF CONTROL BLOCK DIAGRAM [LF]
E5U014000000N50
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STARTER CUT-OFF CONTROL OPERATION [LF]
E5U014000000N51
• The PCM stops energization of the starter relay according to an engine stop request from the immobilizer
system.
When receiving engine stop request signal
— The PCM does not establish a ground to the starter circuit. Therefore, the starter motor does not rotate
because there is no energization of the starter relay even if the ignition switch is turned to the START
position, and the engine does not start.
When not receiving engine stop request signal
— The PCM establishes a ground to the starter circuit. Therefore, when the ignition switch is turned to the
START position, the starter relay is energized and the starter motor rotates. As a result, the engine starts
normally.
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INSTRUMENT CLUSTER
(IMMOBILIZER RELATED
INFORMATION)
STARTER RELAY
PCM
E5U140ZW5403
PCM
M
WHEN NOT RECEIVING ENGINE
STOP REQUEST SIGNAL
WHEN ENGINE STOP REQUEST
SIGNAL IS RECEIVED
IGNITION
SWITCH
START
SIGNAL
STARTER
RELAY
STARTER
AT
TR SWITCH
STARTER
SWITCH
MT
IG 1
B+
PCM
M
IGNITION
SWITCH
START
SIGNAL
STARTER
RELAY
STARTER
AT
TR SWITCH
STARTER
SWITCH
MT
IG 1
B+
E5U140ZT5200