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Without Using the M-MDS

NOTE:
  • Because the PCM uses a waterproof connector, the inspection for the voltage/wave pattern cannot be performed. The following values are for reference.

Terminal voltage table (Reference) 

Fig 1: PCM Wiring Harness-Side Connector Terminals
G11274194Courtesy of MAZDA MOTORS CORP.

-: Not applicable

Terminal Signal Connected to Test condition Voltage (V) Inspection item
1A (3) CAN2_H CAN system related modules Because this terminal is for CAN, integrity determination by terminal voltage is not possible.
  • Related wiring harness
1B (3) CAN2_L CAN system related modules Because this terminal is for CAN, integrity determination by terminal voltage is not possible.
  • Related wiring harness
1C - - - - -
1D Knocking (-) KS Ignition switched ON (engine off) (Use digital type voltmeter, because measurement voltage will be detected less than true voltage when using analog type voltmeter) Approx. 1.64
  • KS
  • Related wiring harness
1E - - - - -
1F - - - - -
1G - - - - -
1H Knocking (+) KS Ignition switched ON (engine off) (Use digital type voltmeter, because measurement voltage will be detected less than true voltage when using analog type voltmeter) Approx. 3.28
  • KS
  • Related wiring harness
1I GND Sensor shield Under any condition Below 1.0
  • Related wiring harness
1J Electric variable valve timing motor (rotation direction) Electric variable valve timing motor/driver (See ELECTRIC VARIABLE VALVE TIMING MOTOR (ROTATION DIRECTION) SIGNAL .)
  • Electric variable valve timing motor/driver
  • Related wiring harness
1K (2) Neutral position Neutral switch Shift lever is at neutral position Below 1.0
  • Neutral switch
  • Related wiring harness
Shift lever is not at neutral position B+
1L (2) Back-up light Back-up light switch Shift lever is at R position Below 1.0
  • Back-up light switch
  • Related wiring harness
Shift lever is not at R position B+
1M - - - - -
1N - - - - -
1O Electric variable valve timing motor (rotation pulse) Electric variable valve timing motor/driver (See ELECTRIC VARIABLE VALVE TIMING MOTOR (ROTATION PULSE) SIGNAL .)
  • Electric variable valve timing motor/driver
  • Related wiring harness
1P Oil pressure Oil pressure switch Ignition switched ON (engine off) Below 1.0
  • Oil pressure switch
  • Related wiring harness
Idle (after warm up) B+
1Q - - - - -
1R - - - - -
1S - - - - -
1T Exhaust CMP Exhaust CMP sensor (See EXHAUST CMP SIGNAL .)
  • Exhaust CMP sensor
  • Related wiring harness
1U - - - - -
1V - - - - -
1W A/F A/F sensor Idle (after warm up) Approx. 4.18
  • A/F sensor
  • Related wiring harness
1X GND Exhaust CMP sensor Under any condition Below 1.0
  • Related wiring harness
1Y Intake CMP Intake CMP sensor (See INTAKE CMP SIGNAL .)
  • Intake CMP sensor
  • Related wiring harness
1Z - - - - -
1AA - - - - -
1AB A/F A/F sensor Idle (after warm up): 0 mA
  • A/F sensor
  • Related wiring harness
1AC GND Intake CMP sensor Under any condition Below 1.0
  • Related wiring harness
1AD CKP CKP sensor (See CKP SIGNAL .)
  • CKP sensor
  • Related wiring harness
1AE Electric variable valve timing driver (diagnostic) Electric variable valve timing motor/driver (See ELECTRIC VARIABLE VALVE TIMING DRIVER (DIAGNOSTIC) SIGNAL .)
  • Electric variable valve timing motor/driver
  • Related wiring harness
1AF Generator output voltage Generator (See GENERATOR OUTPUT VOLTAGE .)
  • Generator
  • Related wiring harness
1AG A/F A/F sensor Idle (after warm up) Approx. 4.01
  • A/F sensor
  • Related wiring harness
1AH GND CKP sensor Under any condition Below 1.0
  • Related wiring harness
1AI Purge control Purge solenoid valve (See PURGE CONTROL .)
  • Purge solenoid valve
  • Related wiring harness
1AJ IGT4 Ignition coil No. 4 (See IGT1, IGT2, IGT3, IGT4 CONTROL .)
  • Ignition coil No. 4
  • Related wiring harness
1AK ECT (No. 1) ECT sensor No. 1 Ignition switched ON (engine off) ECT 20 °C {68 °F} Approx. 3.10
  • ECT sensor No. 1
  • Related wiring harness
ECT 40 °C {104 °F} Approx. 2.16
ECT 60 °C {140 °F} Approx. 1.40
ECT 80 °C {176 °F} Approx. 0.87
ECT 100 °C {212 °F} Approx. 0.54
1AL - - - - -
1AM GND ECT sensor No. 1 Under any condition Below 1.0
  • Related wiring harness
1AN Hydraulic variable valve timing control OCV (See HYDRAULIC VARIABLE VALVE TIMING CONTROL SIGNAL .)
  • OCV
  • Related wiring harness
1AO IGT3 Ignition coil No. 3 (See IGT1, IGT2, IGT3, IGT4 CONTROL .)
  • Ignition coil No. 3
  • Related wiring harness
1AP - - - - -
1AQ - - - - -
1AR - - - - -
1AS Engine oil control Engine oil solenoid valve (See ENGINE OIL CONTROL SIGNAL .)
  • Engine oil solenoid valve
  • Related wiring harness
1AT IGT2 Ignition coil No. 2 (See IGT1, IGT2, IGT3, IGT4 CONTROL .)
  • Ignition coil No. 2
  • Related wiring harness
1AU - - - - -
1AV Ion (No. 4) Ion sensor No. 4 Idle (after warm up) Approx. 4.48
  • Ion sensor No. 4
  • Related wiring harness
1AW - - - - -
1AX - - - - -
1AY IGT1 Ignition coil No. 1 (See IGT1, IGT2, IGT3, IGT4 CONTROL .)
  • Ignition coil No. 1
  • Related wiring harness
1AZ Electric variable valve timing control Electric variable valve timing motor/driver (See ELECTRIC VARIABLE VALVE TIMING CONTROL SIGNAL .)
  • Electric variable valve timing motor/driver
  • Related wiring harness
1BA Ion (No. 3) Ion sensor No. 3 Idle (after warm up) Approx. 4.48
  • Ion sensor No. 3
  • Related wiring harness
1BB GND Sensor shield Under any condition Below 1.0
  • Related wiring harness
1BC - - - - -
1BD - - - - -
1BE Generator field coil control Generator (See GENERATOR FIELD COIL CONTROL SIGNAL .)
  • Generator
  • Related wiring harness
1BF Ion (No. 2) Ion sensor No. 2 Idle (after warm up) Approx. 4.48
  • Ion sensor No. 2
  • Related wiring harness
1BG GND Sensor shield Under any condition Below 1.0
  • Related wiring harness
1BH - - - - -
1BI - - - - -
1BJ Constant voltage (Vref) Fuel pressure sensor Ignition switched ON (engine off) Approx. 5.02
  • Related wiring harness
1BK Ion (No. 1) Ion sensor No. 1 Idle (after warm up) Approx. 4.48
  • Ion sensor No. 1
  • Related wiring harness
1BL GND Sensor shield Under any condition Below 1.0
  • Related wiring harness
1BM - - - - -
1BN Constant voltage (Vref) CKP sensor Ignition switched ON (engine off) Approx. 5.02
  • Related wiring harness
1BO Constant voltage (Vref) TP (No. 1) MAP sensor Ignition switched ON (engine off) Approx. 5.02
  • Related wiring harness
1BP TP (No. 1) TP sensor No. 1 Ignition switched ON (engine off) Accelerator pedal released Approx. 1.15
  • TP sensor No. 1
  • Related wiring harness
Accelerator pedal fully depressed Approx. 4.63
1BQ GND TP sensor No. 1, TP sensor No. 2 Under any condition Below 1.0
  • Related wiring harness
IBR - - - - -
IBS Constant voltage (Vref) TP sensor No. 1, TP sensor No. 2 Ignition switched ON (engine off) Approx. 5.02
  • Related wiring harness
1BT - - - - -
1BU TP (No. 2) TP sensor No. 2 Ignition switched ON (engine off) Accelerator pedal released Approx. 3.95
  • TP sensor No. 2
  • Related wiring harness
Accelerator pedal fully depressed Approx. 0.45
1BV - - - - -
1BW MAP MAP sensor Ignition switched ON (engine off) Approx. 4.15
  • MAP sensor
  • Related wiring harness
Idle (after warm up) Approx. 1.96
Racing (Engine speed: 2, 000 rpm) Approx. 1.33
1BX GND MAP sensor, IAT sensor No. 2 Under any condition Below 1.0
  • Related wiring harness
1BY A/F sensor heater control A/F sensor heater (See A/F SENSOR HEATER CONTROL SIGNAL .)
  • A/F sensor heater
  • Related wiring harness
1BZ GND GND Under any condition Below 1.0
  • Related wiring harness
1CA Fuel pressure Fuel pressure sensor Ignition switched ON (engine off) Approx. 1.51
  • Fuel pressure sensor
  • Related wiring harness
Idle (after warm up) Approx. 1.13
1CB GND Fuel pressure sensor Under any condition Below 1.0
  • Related wiring harness
ICC Drive-by-wire control (-) Throttle valve actuator Ignition switched ON (engine off) Approx. 11.23
  • Throttle valve actuator
  • Related wiring harness
Idle (after warm up) B+
1CD - - - - -
1CE IAT (No. 2) IAT sensor No. 2 Ignition switched ON (engine off) IAT 20 °C {68 °F} Approx. 3.57
  • IAT sensor No. 2
  • Related wiring harness
IAT 40 °C {104 °F} Approx. 2.70
IAT 60 °C {140 °F} Approx. 1.87
1CF - - - - -
1CG Drive-by-wire control (+) Throttle valve actuator (See DRIVE-BY-WIRE CONTROL (+) SIGNAL .)
  • Throttle valve actuator
  • Related wiring harness
1CH - - - - -
1CI - - - - -
1CJ - - - - -
1CK Battery voltage Main relay Ignition switched ON (engine off) B+
  • Main relay
  • Related wiring harness
1CL GND GND Under any condition Below 1.0
  • Related wiring harness
1CM - - - - -
1CN - - - - -
1CO Battery voltage Fuel injector relay Ignition switched ON (engine off) B+
  • Fuel injector relay
  • Related wiring harness
1CP GND GND Under any condition Below 1.0
  • Related wiring harness
1CQ - - - - -
1CR - - - - -
1CS Battery voltage Fuel injector relay Ignition switched ON (engine off) B+
  • Fuel injector relay
  • Related wiring harness
1CT GND GND Under any condition Below 1.0
  • Related wiring harness
1CU - - - - -
1CV - - - - -
1CW Battery voltage Fuel injector relay Ignition switched ON (engine off) B+
  • Fuel injector relay
  • Related wiring harness
1CX GND GND Under any condition Below 1.0
  • Related wiring harness
1CY - - - - -
1CZ - - - - -
1DA Battery voltage Fuel injector relay Ignition switched ON (engine off) B+
  • Fuel injector relay
  • Related wiring harness
1DB GND GND Under any condition Below 1.0
  • Related wiring harness
1DC - - - - -
1DD - - - - -
1DE - - - - -
1DF - - - - -
1DG Battery voltage Fuel injector relay Ignition switched ON (engine off) B+
  • Fuel injector relay
  • Related wiring harness
1DH GND GND Under any condition Below 1.0
  • Related wiring harness
1DI - - - - -
1DJ - - - - -
1DK Battery voltage Fuel injector relay Ignition switched ON (engine off) B+
  • Fuel injector relay
  • Related wiring harness
1DL GND GND Under any condition Below 1.0
  • Related wiring harness
1DM - - - - -
1DN - - - - -
1DO Fuel injection control (-) Fuel injector No. 1 (See FUEL INJECTION CONTROL (-) SIGNAL .)
  • Fuel injector No. 1
  • Related wiring harness
1DP Fuel injection control (+) Fuel injector No. 1 (See FUEL INJECTION CONTROL (+) SIGNAL .)
  • Fuel injector No. 1
  • Related wiring harness
1DQ - - - - -
1DR - - - - -
1DS Fuel injection control (-) Fuel injector No. 4 (See FUEL INJECTION CONTROL (-) SIGNAL .)
  • Fuel injector No. 4
  • Related wiring harness
1DT Fuel injection control (+) Fuel injector No. 4 (See FUEL INJECTION CONTROL (+) SIGNAL .)
  • Fuel injector No. 4
  • Related wiring harness
1DU - - - - -
1DV - - - - -
1DW Fuel injection control (-) Fuel injector No. 2 (See FUEL INJECTION CONTROL (-) SIGNAL .)
  • Fuel injector No. 2
  • Related wiring harness
1DX Fuel injection control (+) Fuel injector No. 2 (See FUEL INJECTION CONTROL (+) SIGNAL .)
  • Fuel injector No. 2
  • Related wiring harness
1DY - - - - -
1DZ - - - - -
1EA Fuel injection control (-) Fuel injector No. 3 (See FUEL INJECTION CONTROL (-) SIGNAL .)
  • Fuel injector No. 3
  • Related wiring harness
1EB Fuel injection control (+) Fuel injector No. 3 (See FUEL INJECTION CONTROL (+) SIGNAL .)
  • Fuel injector No. 3
  • Related wiring harness
1EC - - - - -
1ED - - - - -
1EE High pressure fuel pump control (+) High pressure fuel pump (See HIGH PRESSURE FUEL PUMP CONTROL (+) SIGNAL .)
  • High pressure fuel pump
  • Related wiring harness
1EF High pressure fuel pump control (-) High pressure fuel pump (See HIGH PRESSURE FUEL PUMP CONTROL (-) SIGNAL .)
  • High pressure fuel pump
  • Related wiring harness
1EG - - - - -
1EH - - - - -
1EI - - - - -
1EJ - - - - -
2A - - - - -
2B - - - - -
2C HO2S heater control HO2S heater (See HO2S HEATER CONTROL SIGNAL .)
  • HO2S heater
  • Related wiring harness
2D - - - - -
2E - - - - -
2F (1) ECT (No. 2) ECT sensor No. 2 Ignition switched ON (engine off) ECT 20 °C {68 °F} Approx. 3.10
  • ECT sensor No. 2
  • Related wiring harness
ECT 40 °C {104 °F} Approx. 2.16
ECT 60 °C {140 °F} Approx. 1.40
ECT 80 °C {176 °F} Approx. 0.87
ECT 100 °C {212 °F} Approx. 0.54
2G Brake (No. 1) Brake switch (No. 1 signal) Brake pedal released Below 1.0
  • Brake switch (No. 1 signal)
  • Related wiring harness
Brake pedal fully depressed B+
2H Ignition (IG1) IG1 relay Ignition switched ON (engine off) B+
  • IG1 relay
  • Related wiring harness
2I Ambient temperature Ambient temperature sensor Ignition switched ON (engine off) AAT 20 °C {68 °F} Approx. 2.70
  • Ambient temperature sensor
  • Related wiring harness
AAT 30 °C {104 °F} Approx. 1.80
2J (2) CPP CPP switch, start stop unit Clutch pedal fully depressed Below 1.0
  • CPP switch
  • Start stop unit
  • Related wiring harness
Clutch pedal released B+
2K Main relay control Main relay Ignition switched ON (engine off) Approx. 0.83
  • Main relay
  • Related wiring harness
2L - - - - -
2M - - - - -
2N - - - - -
2O Battery voltage Battery Under any condition B+
  • Battery
  • Related wiring harness
2P - - - - -
2Q - - - - -
2R Brake (No. 2) Brake switch (No. 2 signal) Brake pedal released Below 1.0
  • Brake switch (No. 2 signal)
  • Related wiring harness
Brake pedal fully depressed B+
2S Battery voltage Main relay Ignition switched ON (engine off) B+
  • Main relay
  • Related wiring harness
2T Battery voltage Main relay Ignition switched ON (engine off) B+
  • Main relay
  • Related wiring harness
2U IAT (No. 1) IAT sensor No. 1 Ignition switched ON (engine off) IAT 20 °C {68 °F} Approx. 2.64
  • IAT sensor No. 1
  • Related wiring harness
IAT 40 °C {104 °F} Approx. 1.27
IAT 60 °C {140 °F} Approx. 0.66
2V - - - - -
2W - - - - -
2X Fan control Fan control module Switch ignition ON (engine off) Approx. 0.61
  • Fan control module
  • Related wiring harness
2Y (1) Fuel tank pressure Fuel tank pressure sensor Fuel tank pressure is 10 kPa {0.10 kgf/cm2 , 1.5 psi} lower than barometric pressure. Approx. 1.2
  • Fuel tank pressure sensor
  • Related wiring harness
Fuel tank pressure is equal to barometric pressure. Approx. 2.6
Fuel tank pressure is 6 kPa {0.06 kgf/cm2 , 0.9 psi} higher than barometric pressure. Approx. 3.7
2Z - - - --
2AA GND GND Under any condition Below 1.0
  • Related wiring harness
2AB - - - - -
2AC   - - - -
2AD GND Sensor shield Under any condition Below
  • Related wiring 1.0 harness
2AE Fuel pump control Fuel pump control module (See FUEL PUMP CONTROL SIGNAL .)
  • Fuel pump control module
  • Related wiring harness
2AF A/C cut-off control A/C relay A/C relay OFF B+
  • A/C relay
  • Related wiring harness
A/C relay ON Below 1.0
2AG HO2S (-) HO2S Idle (after warm up) Approx. 1.63
  • HO2S
  • Related wiring harness
2AH - - - - -
2AI HO2S (+) HO2S Idle (after warm up) Approx. 2.35
  • HO2S
  • Related wiring harness
2AJ GND Ambient temperature sensor, refrigerant pressure sensor, fuel tank pressure sensor (1), ECT sensor No. 2 (1) Under any condition Below 1.0
  • Related wiring harness
2AK HS CAN_H CAN system related modules Because this terminal is for CAN, integrity determination by terminal voltage is not possible.
  • Related wiring harness
2AL HS CAN_L CAN system related modules Because this terminal is for CAN, integrity determination by terminal voltage is not possible.
  • Related wiring harness
2AM Fuel pump control (diagnostic) Fuel pump control module (See FUEL PUMP CONTROL MODULE (DIAGNOSTIC) SIGNAL .)
  • Fuel pump control module
  • Related wiring harness
2AN APP (No. 1) APP sensor No. 1 Ignition switched ON (engine off) Accelerator pedal released Approx. 0.82
  • APP sensor No. 1
  • Related wiring harness
Accelerator pedal fully depressed Approx. 4.58
2AO GND APP sensor No. 1 Under any condition Below 1.0
  • Related wiring harness
2AP - - - - -
2AQ Fuel pump control Fuel pump relay Ignition switched ON (engine off) B+
  • Fuel pump relay
  • Related wiring harness
Idle (after warm up) Below 1.0
2AR Constant voltage (Vref) APP sensor No. 1 Ignition switched ON (engine off) Approx. 5.02
  • Related wiring harness
2AS APP (No. 2) APP sensor No. 2 Ignition switched ON (engine off) Accelerator pedal released Approx. 0.42
  • APP sensor No. 2
  • Related wiring harness
Accelerator pedal fully depressed Approx. 2.30
2AT GND APP sensor No. 2 Under any condition Below 1.0
  • Related wiring harness
2AU Cooling fan control Cooling fan relay No. 2 Cooling fan operating Below 1.0
  • Cooling fan relay No. 2
  • Related wiring harness
Cooling fan not operating B+
2AV - - - - -
2AW Constant voltage (Vref) APP sensor No. 2 Ignition switched ON (engine off) Approx. 5.02
  • Related wiring harness
2AX Refrigerant pressure Refrigerant pressure sensor Refrigerant pressure: 1.0 MPa {10 kgf/cm2 , 145 psi} Approx. 1.58
  • Refrigerant pressure sensor
  • Related wiring harness
Refrigerant pressure: 1.1 MPa {11 kgf/cm2 , 160 psi} Approx. 1.72
Refrigerant pressure: 1.2 MPa {12 kgf/cm2 , 174 psi} Approx. 1.88
2AY GND MAF sensor, IAT sensor No. 1 Under any condition Below 1.0
  • Related wiring harness
2AZ Starter cut-off control Starter relay, start stop unit Ignition switched ON (engine off) MTX
  • Clutch pedal released ATX
  • Selector lever position is not P or N position
 B+
  • Starter relay
  • Start stop unit
  • Related wiring harness
MTX
  • Clutch pedal fully depressed

ATX
  • Selector lever position is P or N position
 Below 1.0
2BA - - - - -
2BB Constant voltage (Vref) Refrigerant pressure sensor, MAF sensor Ignition switched ON (engine off) Approx. 5.02
  • Related wiring harness
2BC MAF MAF sensor Ignition switched ON (engine off) Approx. 0.76
  • MAF sensor
  • Related wiring harness
Idle (after warm up) Approx. 1.12
Racing (Engine speed: 2, 000 rpm) Approx. 1.44
2BD Starter interlock(2) Starter interlock switch, start stop unit Clutch pedal fully depressed Below 1.0
  • Starter interlock switch
  • Start stop unit
  • Related wiring harness
Clutch pedal released B+
Selector lever position(3) TCM, start stop unit Selector lever position is not P or N position B+
  • TCM
  • Start stop unit
  • Related wiring harness
Selector lever position is P or N position Below 1.0
2BE - - - - -
2BF(1) CV solenoid control CV solenoid valve Ignition switched ON (engine off) B+
  • CV solenoid valve
  • Related wiring harness
Idle (CV solenoid valve not operating) B+
Idle (CV solenoid valve operating) Below 1.0
2BG - - - - -
2BH - - - - -
(1) U.S.A. and CANADA
(2) MTX
(3) ATX
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