Operation CHARM: Car repair manuals for everyone.
Home >> Mazda >> 1994 >> MX-3 L4-1598cc 1.6L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Brake Signal >> 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

Brake Signal: Testing and Inspection

PREPARATION
Connect the special service tools (SST) to the powertrain control module engine (PCME).

SST Engine Signal Monitor-49 9200 162 And Harness Adapter-49 G018 903:





1. Connect the SST engine signal monitor between the PCME and the vehicle's PCME connector by using the SST adapter harness.

SST Sheet Overlay-49 G018 904:





2. Place the SST engine signal sheet overlay on the SST engine signal monitor.
3. Turn ignition switch ON.
4. Measure voltage at terminal 2L.

Condition:--Brake pedal released.
Voltage:--Below 1.0 Volt.

Condition:--Brake pedal depressed.
Voltage:--Battery voltage.

If readings are not as shown, then inspect the stoplight switch, the wiring between the stoplight switch and PCME terminal 2L.
pro multis · About Operation CHARM