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Home >> Mazda >> 2022 >> CX-5 S Select >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (VIN M) >> Pcm Inspection >> Without Using the M-MDS
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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) 

G12184593Courtesy of MAZDA MOTORS CORP.

- : Not applicable 

Terminal Signal Connected to Test condition Voltage (V) inspection item
1A CAN_2H CAN system related modules Because this terminal is for CAN, integrity determination by terminal voltage is not possible.
  • Related wiring harness
1B CAN_2L CAN system related modules Because this terminal is for CAN, integrity determination by terminal voltage is not possible.
  • Related wiring harness
1C - - - - -
1D Constant voltage (Vref) Engine oil pressure sensor, engine oil temperature sensor, coolant control valve position sensor, exhaust shutter valve position sensor Ignition switched ON (engine off) Approx. 5.0
  • Related wiring harness
1E Constant voltage (Vref) CKP sensor Ignition switched ON (engine off) Approx. 5.0
  • Related wiring harness
1F CKP CKP sensor (See CKP signal ).
  • CKP sensor
  • Related wiring harness
1G - - - - -
1H - - - - -
1I Coolant control valve position Coolant control valve position sensor Because this terminal is for SENT signal, integrity determination by terminal voltage is not possible.
  • Coolant control valve position sensor
  • Related wiring harness
1J Constant voltage (Vref) MAP sensor Ignition switched ON (engine off) Approx. 5.0
  • Related wiring harness
1K Constant voltage (Vref) Fuel pressure sensor Ignition switched ON (engine off) Approx. 5.0
  • Related wiring harness
1L Constant voltage (Vref) TP sensor No. 1, TP sensor No. 2 Ignition switched ON (engine off) Approx. 5.0
  • Related wiring harness
1M A/F A/F sensor Ignition switched ON (engine off) Approx. 5.0
  • A/F sensor
  • Related wiring harness
Idle (after warm up) 3.0-4.0
1N GND Sensor shield Under any condition Below 1.0
  • Related wiring harness
1O TP (No. 1) TP sensor No. 1 Ignition switched ON (engine off) Accelerator pedal released Approx. 0.5
  • TP sensor No. 1
  • Related wiring harness
Accelerator pedal depressed Approx. 4.59
1P Exhaust shutter valve position Exhaust shutter valve position sensor Idle (after warm up) Approx. 0.7
  • Exhaust shutter valve position sensor
  • Related wiring harness
During cylinder deactivation control 0.7-4.2
1Q IAT (No. 2) IAT sensor No. 2 Idle (after warm up) 3.0- 4.0
  • IAT sensor No. 2
  • Related wiring harness
  IAT 40 °C {104°F} Approx. 2.70
  IAT 60 °C {140 °F} Approx. 1.87
1R GND TP sensor No. 1, TP sensor No. 2 Under any condition Below 1.0
  • Related wiring harness
1S A/F A/F sensor Idle (after warm up): 0 mA
  • A/F sensor
  • Related wiring harness
1T A/F A/F sensor Idle (after warm up) Approx. 4.1
  • A/F sensor
  • Related wiring harness
1U GND Sensor shield Under any condition Below 1.0
  • Related wiring harness
1V TP (No. 2) TP sensor No. 2 Ignition switched ON (engine off) Accelerator pedal released Approx. 4.5
  • TP sensor No. 2
  • Related wiring harness
Accelerator pedal depressed Below 1.0
1W Fuel pressure Fuel pressure sensor Idle (ECT 80°C{176 °F}) Approx. 1.6
  • Fuel pressure sensor
  • Related wiring harness
1X MAP MAP sensor Ignition switched ON (engine off) Approx. 4.07
  • MAP sensor
  • Related wiring harness
Idle (after warm up) Approx. 1.1
Racing
(Engine speed: 2, 000 rpm)		 Approx. 0.92
1Y 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. 3.2
  • KS
  • Related wiring harness
1Z 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) Below 1.6
  • KS
  • Related wiring harness
1AA - - - - -
1AB GND ECT sensor No. 1, ECT sensor No. 2, engine oil pressure sensor, engine oil temperature sensor, engine oil level sensor Under any condition Below 1.0
  • Related wiring harness
1AC - - - - -
1AD Electric variable valve timing driver (diagnostic) Electric variable valve timing driver (See Electric variable valve timing driver (diagnostic) signal ).
  • Electric variable valve timing driver
  • Related wiring harness
1AE Ion (No. 2) Ion sensor No. 2 Idle (after warm up) Approx. 4.4
  • Ion sensor No. 2
  • Related wiring harness
1AF Ion (No. 4) Ion sensor No. 4 Idle (after warm up) Approx. 4.4
  • Ion sensor No. 4
  • Related wiring harness
1AG Generator output voltage Generator (See Generator output voltage ).
  • Generator
  • Related wiring harness
1AH ECT 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
1AI GND Intake CMP sensor, exhaust CMP sensor Under any condition Below 1.0
  • Related wiring harness
1AJ - - - - -
1AK Ion (No. 3) Ion sensor No. 3 Idle (after warm up) Approx. 4.4
  • Ion sensor No. 3
  • Related wiring harness
1AL Ion (No. 1) Ion sensor No. 1 Idle (after warm up) Approx. 4.4
  • Ion sensor No. 1
  • Related wiring harness
1AM ECT 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
1AN Engine oil temperature Engine oil temperature sensor Ignition switched ON (engine off) Approx. 3.21
  • Engine oil temperature sensor
  • Related wiring harness
1AO - - - - -
1AP GND CKP sensor Under any condition Below 1.0
  • Related wiring harness
1AQ - - - - -
1AR - - - - -
1AS Engine oil pressure Engine oil pressure sensor Ignition switched ON (engine off) Below 1.1
  • Engine oil pressure sensor
  • Related wiring harness
Immediately after the engine start Approx. 1.6
1AT GND Sensor shield Under any condition Below 1.0
  • Related wiring harness
1AU - - - - -
1AV - - - - -
1AW Purge control Purge solenoid valve (See Purge control ).
  • Purge solenoid valve
  • Related wiring harness
1AX - - - - -
1AY - - - - -
1AZ - - - - -
1BA - - - - -
1BB - - - - -
1BC IGT1 Ignition coil No. 1 (See IGT1, IGT2, IGT3, IGT4 control ).
  • Ignition coil No. 1
  • Related wiring harness
1BD - - - - -
1BE - - - - -
1BF - - - - -
1BG GND Coolant control valve position sensor, exhaust shutter valve position sensor Under any condition Below 1.0
  • Related wiring harness
1BH GND MAP sensor, IAT sensor No. 2, fuel pressure sensor Under any condition Below 1.0
  • Related wiring harness
1BI IGT2 Ignition coil No. 2 (See IGT1, IGT2, IGT3, IGT4 control ).
  • Ignition coil No. 2
  • Related wiring harness
1BJ - - - - -
1BK - - - - -
1BL - - - - -
1BM Electric variable valve timing motor (rotation pulse) Electric variable valve timing motor (See Electric variable valve timing motor (rotation pulse) signal ).
  • Electric variable valve timing motor
  • Related wiring harness
1BN Electric variable valve timing motor (rotation direction) Electric variable valve timing motor (See Electric variable valve timing motor (rotation direction) signal ).
  • Electric variable valve timing motor
  • Related wiring harness
1BO IGT3 Ignition coil No. 3 (See IGT1, IGT2, IGT3, IGT4 control ).
  • Ignition coil No. 3
  • Related wiring harness
1BP Generator field coil control Generator (See Generator field coil control signal ).
  • Generator
  • Related wiring harness
1BQ - - - - -
1BR GND Sensor shield Under any condition Below 1.0
  • Related wiring harness
1BS - - - - -
1BT Intake CMP Intake CMP sensor (See Intake CMP signal ).
  • Intake CMP sensor
  • Related wiring harness
1BU IGT4 Ignition coil No. 4 (See IGT1, IGT2, IGT3, IGT4 control ).
  • Ignition coil No. 4
  • Related wiring harness
1BV Electric variable valve timing control Electric variable valve timing driver (See Electric variable valve timing control signal ).
  • Electric variable valve timing driver
  • Related wiring harness
1BW - - - - -
1BX - - - - -
1BY - - - - -
1BZ Exhaust CMP Exhaust CMP sensor (See Exhaust CMP signal ).
  • Exhaust CMP sensor
  • Related wiring harness
1CA - - - - -
1CB A/F sensor heater control A/F sensor heater (See A/F sensor heater control signal ).
  • A/F sensor heater
  • Related wiring harness
1CC - - - - -
1CD - - - - -
1CE OCV for No. 4 cylinder deactivation control (+) OCV for No. 4 cylinder deactivation Ignition switched ON (engine off) B+
  • OCV for No. 4 cylinder deactivation
  • Related wiring harness
1CF OCV for No. 4 cylinder deactivation control (-) OCV for No. 4 cylinder deactivation Ignition switched ON (engine off) B+
  • OCV for No. 4 cylinder deactivation
  • Related wiring harness
1CG - - - - -
1CH - - - - -
1CI OCV for No. 1 cylinder deactivation control (+) OCV for No. 1 cylinder deactivation Ignition switched ON (engine off) B+
  • OCV for No. 1 cylinder deactivation
  • Related wiring harness
1CJ OCV for No. 1 cylinder deactivation control (-) OCV for No. 1 cylinder deactivation Ignition switched ON (engine off) B+
  • OCV for No. 1 cylinder deactivation
  • Related wiring harness
1CK Engine oil control Engine oil solenoid valve (See Engine oil control signal ).
  • Engine oil solenoid valve
  • Related wiring harness
1CL - - - - -
1CM - - - - -
1CN - - - - -
1CO Hydraulic variable valve timing control OCV for hydraulic variable valve timing system (See Hydraulic variable valve timing control signal ).
  • OCV
  • Related wiring harness
1CP - - - - -
1CQ Drive-by-wire control (+) Throttle valve actuator (See Drive-by-wire control (+) signal ).
  • Throttle valve actuator
  • Related wiring harness
1CR Drive-by-wire control (-) Throttle valve actuator Idle (after warm up) Because the drive-by-wire control (-) terminal value varies depending on the vehicle, examination using only the ICQ terminal is not possible. When performing the inspection, perform it together with the ICR terminal.
  • Type A - B+
  • Type B - Approx. 0
  • Throttle valve actuator
  • Related wiring harness
1CS Exhaust shutter valve control (+) Exhaust shutter valve Ignition switched ON (engine off) B+
  • Exhaust shutter valve
  • Related wiring harness
1CT Exhaust shutter valve control (-) Exhaust shutter valve Ignition switched ON (engine off) B+
  • Exhaust shutter valve
  • Related wiring harness
1CU Fuel injection control (+) Fuel injector No. 3 (See Fuel injection control (+) signal ).
  • Fuel injector No. 3
  • Related wiring harness
1CV Fuel injection control (-) Fuel injector No. 3 (See Fuel injection control (-) signal ).
  • Fuel injector No. 3
  • Related wiring harness
1CW Coolant control valve control (+) Coolant control valve Ignition switched ON (engine off) B+
  • Coolant control valve
  • Related wiring harness
1CX Coolant control valve control (-) Coolant control valve Ignition switched ON (engine off) B+
  • Coolant control valve
  • Related wiring harness
1CY Fuel injection control (+) Fuel injector No. 2 (See Fuel injection control (+) signal ).
  • Fuel injector No. 2
  • Related wiring harness
1CZ Fuel injection control (-) Fuel injector No. 2 (See Fuel injection control (-) signal ).
  • Fuel injector No. 2
  • Related wiring harness
1DA - - - - -
1DB - - - - -
1DC Fuel injection control (+) Fuel injector No. 4 (See Fuel injection control (+) signal ).
  • Fuel injector No. 4
  • Related wiring harness
1DD Fuel injection control (-) Fuel injector No. 4 (See Fuel injection control (-) signal ).
  • Fuel injector No. 4
  • Related wiring harness
1DE - - - - -
1DF - - - - -
1DG Fuel injection control (+) Fuel injector No. 1 (See Fuel injection control (+) signal ).
  • Fuel injector No. 1
  • Related wiring harness
1DH Fuel injection control (-) Fuel injector No. 1 (See Fuel injection control (-) signal ).
  • Fuel injector No. 1
  • Related wiring harness
1DI High pressure fuel pump control (+) High pressure fuel pump (See High pressure fuel pump control (+) signal ).
  • High pressure fuel pump
  • Related wiring harness
1DJ High pressure fuel pump control (-) High pressure fuel pump (See High pressure fuel pump control (-) signal ).
  • High pressure fuel pump
  • Related wiring harness
2A Battery voltage Battery Ignition switched ON (engine off) B+
  • Related wiring harness
2B Main relay control Main relay Ignition switched ON (engine off) Below 1.0
  • Main relay
  • Related wiring harness
2C - - - - -
2D Fuel pump control Fuel pump control module (See Fuel pump control signal ).
  • Fuel pump control module
  • Related wiring harness
2E - - - - -
2F Ignition (IG1) IG1 relay Ignition switched ON (engine off) B+
  • IG1 relay
  • Related wiring harness
2G - - - - -
2H Starter cut-off control Starter relay, start stop unit Ignition switched ON (engine off) Selector lever position is not P or N position B+
  • Starter relay
  • Start stop unit
  • Related wiring harness
Selector lever position is P or N position Below 1.0
2I - - - - -
2J - - - - -
2K - - - - -
2L - - - - -
2M - - - - -
2N - - - - -
2O - - - - -
2P Brake (No. 2) Brake switch (No. 2 signal) Brake pedal released Below 1.0
  • Brake switch (No. 2 signal)
  • Related wiring harness
Brake pedal depressed B+
2Q - - - - -
2R 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
2S CAN_H CAN system related modules Because this terminal is for CAN, integrity determination by terminal voltage is not possible.
  • Related wiring harness
2T CAN_L CAN system related modules Because this terminal is for CAN, integrity determination by terminal voltage is not possible.
  • Related wiring harness
2U - - - - -
2V - - - - -
2W - - - - -
2X - - - - -
2Y Active air shutter control (LIN), engine oil level sensor (LIN) Active air shutter, engine oil level sensor Because this terminal is for LIN, good/no good judgment by terminal voltage is not possible.
  • Related wiring harness
2Z - - - - -
2AA - - - - -
2AB Brake (No. 1) Brake switch (No. 1 signal) Brake pedal released Below 1.0
  • Brake switch (No. 1 signal)
  • Related wiring harness
Brake pedal depressed B+
2AC - - - - -
2AD - - - - -
2AE - - - - -
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 - - - - -
2AH - - - - -
2AI GND MAF sensor, IAT sensor No. 1, refrigerant pressure sensor, ambient temperature sensor, fuel tank pressure sensor Under any condition Below 1.0
  • Related wiring harness
2AJ Fuel tank pressure Fuel tank pressure sensor Ignition switched ON (engine off) 2.1-2.6
  • Fuel tank pressure sensor
  • Related wiring harness
2AK - - - - -
2AL 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
2AM 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+
2AN - - - - -
2AO Constant voltage (Vref) APP sensor No. 2 Ignition switched ON (engine off) Approx. 5.0
  • Related wiring harness
2AP - - - - -
2AQ - - - - -
2AR - - - - -
2AS Cooling fan control Cooling fan relay No. 1, cooling fan relay No. 3 Cooling fan operating Below 1.0
  • Cooling fan relay No. 1, No. 3
  • Related wiring harness
Cooling fan not operating B+
2AT Constant voltage (Vref) MAF sensor, IAT sensor No. 1 Ignition switched ON (engine off) Approx. 5.0
  • Related wiring harness
2AU Constant voltage (Vref) Clutch stroke sensor, fuel tank pressure sensor Ignition switched ON (engine off) Approx. 5.0
  • Related wiring harness
2AV Refrigerant pressure Refrigerant pressure sensor Refrigerant pressure: 1.0 MPa {10 kgf/cm 2 , 145 psi} Approx. 1.58
  • Refrigerant pressure sensor
  • Related wiring harness
Refrigerant pressure: 1.1 MPa {11 kgf/cm 2 , 160 psi} Approx. 1.75
Refrigerant pressure: 1.2 MPa {12 kgf/cm 2 , 174 psi} Approx. 1.88
2AW 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
2AX Fuel pump control module (diagnostic) Fuel pump control module (See Fuel pump control module (diagnostic) signal ).
  • Fuel pump control module
  • Related wiring harness
2AY - - - - -
2AZ Constant voltage (Vref) Refrigerant pressure sensor Ignition switched ON (engine off) Approx. 5.0
  • Related wiring harness
2BA Constant voltage (Vref) APP sensor No. 1 Ignition switched ON (engine off) Approx. 5.0
  • Related wiring harness
2BB APP (No. 2) APP sensor No. 2 Ignition switched ON (engine off) Accelerator pedal released Approx. 0.4
  • APP sensor No. 2
  • Related wiring harness
Accelerator pedal depressed Approx. 2.2
2BC - - - - -
2BD Selector lever position 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 Intake air MAF sensor, IAT sensor No. 1 Because this terminal is for SENT signal, integrity determination by terminal voltage is not possible.
  • MAF sensor, IAT sensor No. 1
  • Related wiring harness
2BF - - - - -
2BG GND APP sensor No. 2 Under any condition Below 1.0
  • Related wiring harness
2BH GND APP sensor No. 1 Under any condition Below 1.0
  • Related wiring harness
2BI - - - - -
2BJ HO2S heater control HO2S heater (See HO2S heater control signal ).
  • HO2S heater
  • Related wiring harness
2BK HO2S (+) HO2S Idle (after warm up) 0-0.7
  • HO2S
  • Related wiring harness
2BL HO2S (-) HO2S Idle (after warm up) Approx. 2.05
  • HO2S
  • Related wiring harness
2BM GND Sensor shield Under any condition Below 1.0
  • Related wiring harness
2BN APP (No. 1) APP sensor No. 1 Ignition switched ON (engine off) Accelerator pedal released Approx. 0.8
  • APP sensor No. 1
  • Related wiring harness
Accelerator pedal depressed Approx. 4.5
2BO Main power supply Main relay Ignition switched ON (engine off) B+
  • Main relay
  • Related wiring harness
2BP - - - - -
2BQ GND GND Under any condition Below 1.0
  • Related wiring harness
2BR Main power supply Main relay Ignition switched ON (engine off) B+
  • Main relay
  • Related wiring harness
2BS - - - - -
2BT GND GND Under any condition Below 1.0
  • Related wiring harness
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