AEM 30-8760 CAS Trigger Disc User Manual
WARNING:
!
This installation is not for the tuning novice nor the PC illiterate!
Use this system with EXTREME caution! The AEM EMS System
allows for total flexibility in engine tuning. Misuse of this
product can destroy your engine! If you are not well versed in
engine dynamics and the tuning of management systems or are
not PC literate, please do not attempt the installation. Refer the
installation to a AEM trained tuning shop or call 800-423-0046
for technical assistance. You should also visit the AEM EMS
Tech Forum at http://www.aempower.com
NOTE: AEM holds no responsibility for any engine damage that
results from the misuse of this product!
Installation Instructions for:
Crank Angle Sensor replacement for EMS P/N 30-6600
89-94 Nissan 240SX S13 KA24DE
91-94 Nissan Sentra B13 GA16DE
90-94 Nissan Pulsar GTi-R N14 SR20DET
91-93 Nissan NX B13 GA16DE
93-94 Nissan Altima U13 KA24DE
89-95 Nissan Bluebird U13 SR20DET
91-93 Infiniti G20 P10 SR20DE
This product is legal in California for racing vehicles only and should never
be used on public highways.
2010 ADVANCED ENGINE MANAGEMENT INC.
2205 126th Street Unit A Hawthorne, CA. 90250
Phone: (310) 484-2322 Fax: (310) 484-0152
http://www.aempower.com
Instruction Part Number: 10-6600-A supplement
Page 1 of 9
**Cam / Crank Angle Sensor: AEM trigger disc MUST be used
Discrepancies have been observed in the OEM cam/crank angle trigger discs between
model years and/or trim levels; to avoid confusion the Series 2 EMS does not support the
OEM Nissan trigger pattern. A replacement trigger disc is now included with every Nissan
EMS and must be installed before attempting to start the engine. The following installation
was performed on a stock Nissan S13 240SX so your installation may require more or less
removal of parts, but the procedure for the CAS disc change should be identical.
Tools/parts required:
Replacement trigger disc for Nissan GA/KA/SR cam angle sensor
(AEM P/N 35-8760, supplied with 30-6600, 30-6601, 30-6602, 30-6610, 30-6611,
30-6620, and 30-6623 EMS)
8mm and 10mm socket with ratchet and extension
10mm combination wrench
Medium pry bar
¼” flat screwdriver
No. 2 Phillips screwdriver
No. 1 Phillips screwdriver
Red threadlocker
WARNING:
Failure to perform the following procedure correctly could result in permanent damage to
mechanical and electrical sensor components, which could result in engine damage.
Please read all instructions carefully before attempting this procedure, and do not attempt
the install if you feel you may not be able to perform all operations safely without
damaging components. AEM will not be held liable for any damage that occurs as a result
of these instructions.
Page 2 of 9
Instructions with photos on the following pages:
Remove the MAF sensor assembly as shown in figure 1. The arrow points to a mount that
may or may not be present on your vehicle which was removed using a 10mm
combination wrench and 10mm socket. The hose clamp is removed with the ¼” flat
screwdriver.
Figure 1: MAF assembly removal
Figure 2 shows the location of the CAS sensor (inside the distributor assembly).
Figure 2: Location of CAS sensor (underneath distributor cap)
Page 3 of 9
Remove the plastic cover as shown in figure 3.
Figure 3: Plastic wire cover removed
Remove the back part of the outer plastic cover on the distributor and remove the
distributor cap as shown in figure 4.
Figure 4: Plastic wire cover removed and distributor cap removed
Page 4 of 9
Remove the distributor rotor with carefully with the pry bar as shown in figure 5, taking
note of how the rotor was oriented on the shaft. (The photo shows a different distributor
that has the same type of rotor installation)
Figure 5: Distributor rotor removed with pry bar
Remove the internal plastic cover shown in figure 6.
Figure 6: Internal plastic cover to be removed
Page 5 of 9
Remove the internal CAS disc cover shown in figure 7 with a #2 Phillips screwdriver.
Figure 7: Removal of internal CAS disc cover
Remove the screw holding the CAS disc and collar as shown in figure 8 with the #2
Phillips screwdriver (Make sure screwdriver is firmly planted since this screw will be very
tight).
Figure 8: Original CAS disc removal
Page 6 of 9
Figure 9 shows the original CAS disc with the collar that holds it in place removed. The
original disc can be removed now. For future use, the original disc should be marked UP
to remember what the original orientation of the disc is.
Figure 9: Original CAS disc with collar removed
The new AEM trigger disc is installed as shown in figure 10, orientation up or down is not
important, only the D-shaped mounting on the shaft.
Figure 10: AEM CAS trigger disc installed
Page 7 of 9
The collar and screw can be reinstalled as shown in figure 11.
Figure 11: Trigger disc and collar reinstalled
The internal CAS disc cover can be reinstalled with two screws that held it in place as
shown in figure 12.
Figure 12: Trigger disc cover reinstalled
Page 8 of 9
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