Operation CHARM: Car repair manuals for everyone.
Home >> Mazda >> 1993 >> MX-3 V6-1844cc 1.8L DOHC >> Repair and Diagnosis >> Powertrain Management >> Transmission Control Systems >> Relays and Modules - Transmission and Drivetrain >> Relays and Modules - A/T >> Control Module >> Testing and Inspection
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Control Module: Testing and Inspection

EC-AT CONTROL UNIT (K8 DOHC and B6 SOHC [California])

Inspection




1. Disconnect the EC-AT control unit connectors.
2. Connect the SSTs (Engine Signal Monitor and Adapter Harness) to the EC-AT control unit as shown.




3. Place the SST (Sheet) on the Engine Signal Monitor.
4. Turn the ignition switch ON, and check the EC-AT control unit terminal voltage, referring to the Terminal Voltage Chart.
5. If any EC-AT control unit terminal voltage is incorrect, check the related input or output devices and wiring. If no problem is found in these devices, replace the EC-AT control unit.






CAUTION: Never apply voltage to SST terminal A and B.

Terminal Voltage Chart (K8 DOHC) Part 1:




Terminal Voltage Chart (K8 DOHC) Part 2:




Terminal Voltage Chart (K8 DOHC)

Terminal Voltage Chart (B6 SOHC (California)) Part 1:




Terminal Voltage Chart (B6 SOHC (California)) Part 2:




Terminal Voltage Chart (B6 SOHC)

pro multis · About Operation CHARM