Pcm Construction/Operation; Neutral Switch Function (Mt); Neutral Switch Construction/Operation (Mt) - Mazda RX-8 2004 Service Highlights

PCM CONSTRUCTION/OPERATION

• Located in front area of the engine compartment.
• 122-pin connector (13B-MSP (High Power)) or 105-pin connector (13B-MSP (Standard Power)) is used for the
PCM.
3P 3M 3J
3Q 3N 3K
3R 3O
13B-MSP (HIGH POWER)
5AF
5AG
5AH
• The fresh air induction duct has been installed to
cool the PCM. During regular driving, fresh air is
induced by wind that blows against the vehicle as
it is running. When the PCM temperature is high
and the vehicle has stopped, the cooling fan
operates, inducing additional fresh air.
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NEUTRAL SWITCH FUNCTION (MT)

• The neutral switch detects the neutral position of the gearshift lever.
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NEUTRAL SWITCH CONSTRUCTION/OPERATION (MT)

• When the shift lever is in the neutral position, the contact closes (ON) and the PCM detects a voltage of 0 V.
When the shift lever is not in the neutral position, the contact opens (OFF) and the PCM detects a voltage of 12
V.
NEUTRAL SWITCH
PUSH OFF
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CONTROL SYSTEM
3G 3D 3A
2AB 2Y 2V 2P
3H 3E 3B
2AC 2Z 2W 2T 2Q
3I 3F 3C
2AD 2AA 2X 2U 2R
5AC 5Z 5U 5R 5O 5L 5D
5AD 5AA 5X 5V 5S 5P 5M 5J 5H
5AE 5AB 5W 5T 5N 5K 5I
OTHER THAN NEUTRAL
(OFF)
1V 1S
2M 2J 2G 2D 2A
1W 1T
2N 2K 2H 2E 2B
1X 1U
2O 2I 2F 2C
4X 4U 4P 4M 4J
5A
4Y 4V 4S 4Q 4N
5E 5B
4Z 4W 4T 4O
5F 5C
PCM
DUCT
NEUTRAL
(ON)
NEUTRAL
(ON)
EXCEPT ABOVE
CHU014018880S02
1M 1J 1G 1D 1A
1Q 1N 1K 1H 1E 1B
1R 1O 1L 1F 1C
4D 4A
4K 4H 4E 4B
4L 4I 4F 4C
CHU0140S079
BATTERY
CHU0140S040
CHU014017640S01
CHU014017640S02
P C M
CPU
NO
LOAD
LOAD
CHU0140S042
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01–40