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Central Processing Unit (CPU)

NOTE: Remove CPU when measuring voltages at terminals 3C and 3F of CPU 14-pin connector.

With CPU connectors connected, measure voltage at specified terminal of CPU connectors. SeeFig 1 . See CPU TERMINAL VOLTAGES  . If voltages are not as specified, replace CPU.

CPU TERMINAL VOLTAGES

Terminal Application Test Condition Volts
1K Door/Trunk Opener Relay Other 12
1O Door/Trunk Opener Relay Other Greater Than Zero
1P Keyless Unit 1 Other Zero
2F Pass. Door Lock Actuator Locked Approx. 5
2F Pass. Door Lock Actuator Unlocked Zero
2H Driver Door Lock Actuator Locked Approx. 5
2H Driver Door Lock Actuator Unlocked Zero
2I Keyless Unit 2 Other Zero
2J Rear Door Lock Actuator Locked Approx. 5
2J Rear Door Lock Actuator Unlocked Zero
2L Door Key Cylinder Switch Locked 2.5
2L (Passenger Side) Unlocked Zero
2L (Passenger Side) Other 5
2P Door Lock Switch Locked 2.5
2P Door Lock Switch Unlocked Zero
2P Door Lock Switch Other 5
2R Door Key Cylinder Switch Unlocked Zero
" (Driver Side) Other 5
3C Door Lock Timer Unit (Lock) Constant (1) 12
3F Door Lock Timer Unit (Unlock) Constant (1) 12
(1) Remove CPU when measuring voltages.
Fig 1: Identifying Terminals Of CPU Connectors
G94H47099Courtesy of MAZDA MOTORS CORP.