Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2022 Mazda CX-5 SFACTORY OEM SERVICE PROCEDURE
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)
- : 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. |
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| 1B | CAN_2L | CAN system related modules | Because this terminal is for CAN, integrity determination by terminal voltage is not possible. |
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| 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 |
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| 1E | Constant voltage (Vref) | CKP sensor | Ignition switched ON (engine off) | Approx. 5.0 |
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| 1F | CKP | CKP sensor | (See CKP signal ). |
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| 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. |
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| 1J | Constant voltage (Vref) | MAP sensor | Ignition switched ON (engine off) | Approx. 5.0 |
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| 1K | Constant voltage (Vref) | Fuel pressure sensor | Ignition switched ON (engine off) | Approx. 5.0 |
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| 1L | Constant voltage (Vref) | TP sensor No. 1, TP sensor No. 2 | Ignition switched ON (engine off) | Approx. 5.0 |
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| 1M | A/F | A/F sensor | Ignition switched ON (engine off) | Approx. 5.0 |
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| Idle (after warm up) | 3.0-4.0 | |||||
| 1N | GND | Sensor shield | Under any condition | Below 1.0 |
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| 1O | TP (No. 1) | TP sensor No. 1 | Ignition switched ON (engine off) | Accelerator pedal released | Approx. 0.5 |
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| Accelerator pedal depressed | Approx. 4.59 | |||||
| 1P | Exhaust shutter valve position | Exhaust shutter valve position sensor | Idle (after warm up) | Approx. 0.7 |
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| During cylinder deactivation control | 0.7-4.2 | |||||
| 1Q | IAT (No. 2) | IAT sensor No. 2 | Idle (after warm up) | 3.0- 4.0 |
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| 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 |
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| 1S | A/F | A/F sensor | Idle (after warm up): 0 mA |
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| 1T | A/F | A/F sensor | Idle (after warm up) | Approx. 4.1 |
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| 1U | GND | Sensor shield | Under any condition | Below 1.0 |
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| 1V | TP (No. 2) | TP sensor No. 2 | Ignition switched ON (engine off) | Accelerator pedal released | Approx. 4.5 |
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| Accelerator pedal depressed | Below 1.0 | |||||
| 1W | Fuel pressure | Fuel pressure sensor | Idle (ECT 80°C{176 °F}) | Approx. 1.6 |
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| 1X | MAP | MAP sensor | Ignition switched ON (engine off) | Approx. 4.07 |
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| 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 |
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| 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 |
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| 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 |
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| 1AC | - | - | - | - | - | |
| 1AD | Electric variable valve timing driver (diagnostic) | Electric variable valve timing driver | (See Electric variable valve timing driver (diagnostic) signal ). |
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| 1AE | Ion (No. 2) | Ion sensor No. 2 | Idle (after warm up) | Approx. 4.4 |
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| 1AF | Ion (No. 4) | Ion sensor No. 4 | Idle (after warm up) | Approx. 4.4 |
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| 1AG | Generator output voltage | Generator | (See Generator output voltage ). |
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| 1AH | ECT | ECT sensor No. 1 | Ignition switched ON (engine off) | ECT 20 °C {68 °F} | Approx. 3.10 |
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| 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 |
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| 1AJ | - | - | - | - | - | |
| 1AK | Ion (No. 3) | Ion sensor No. 3 | Idle (after warm up) | Approx. 4.4 |
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| 1AL | Ion (No. 1) | Ion sensor No. 1 | Idle (after warm up) | Approx. 4.4 |
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| 1AM | ECT | ECT sensor No. 2 | Ignition switched ON (engine off) | ECT 20 °C {68 °F} | Approx. 3.10 |
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| 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 |
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| 1AO | - | - | - | - | - | |
| 1AP | GND | CKP sensor | Under any condition | Below 1.0 |
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| 1AQ | - | - | - | - | - | |
| 1AR | - | - | - | - | - | |
| 1AS | Engine oil pressure | Engine oil pressure sensor | Ignition switched ON (engine off) | Below 1.1 |
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| Immediately after the engine start | Approx. 1.6 | |||||
| 1AT | GND | Sensor shield | Under any condition | Below 1.0 |
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| 1AU | - | - | - | - | - | |
| 1AV | - | - | - | - | - | |
| 1AW | Purge control | Purge solenoid valve | (See Purge control ). |
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| 1AX | - | - | - | - | - | |
| 1AY | - | - | - | - | - | |
| 1AZ | - | - | - | - | - | |
| 1BA | - | - | - | - | - | |
| 1BB | - | - | - | - | - | |
| 1BC | IGT1 | Ignition coil No. 1 | (See IGT1, IGT2, IGT3, IGT4 control ). |
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| 1BD | - | - | - | - | - | |
| 1BE | - | - | - | - | - | |
| 1BF | - | - | - | - | - | |
| 1BG | GND | Coolant control valve position sensor, exhaust shutter valve position sensor | Under any condition | Below 1.0 |
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| 1BH | GND | MAP sensor, IAT sensor No. 2, fuel pressure sensor | Under any condition | Below 1.0 |
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| 1BI | IGT2 | Ignition coil No. 2 | (See IGT1, IGT2, IGT3, IGT4 control ). |
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| 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 ). |
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| 1BN | Electric variable valve timing motor (rotation direction) | Electric variable valve timing motor | (See Electric variable valve timing motor (rotation direction) signal ). |
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| 1BO | IGT3 | Ignition coil No. 3 | (See IGT1, IGT2, IGT3, IGT4 control ). |
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| 1BP | Generator field coil control | Generator | (See Generator field coil control signal ). |
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| 1BQ | - | - | - | - | - | |
| 1BR | GND | Sensor shield | Under any condition | Below 1.0 |
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| 1BS | - | - | - | - | - | |
| 1BT | Intake CMP | Intake CMP sensor | (See Intake CMP signal ). |
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| 1BU | IGT4 | Ignition coil No. 4 | (See IGT1, IGT2, IGT3, IGT4 control ). |
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| 1BV | Electric variable valve timing control | Electric variable valve timing driver | (See Electric variable valve timing control signal ). |
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| 1BW | - | - | - | - | - | |
| 1BX | - | - | - | - | - | |
| 1BY | - | - | - | - | - | |
| 1BZ | Exhaust CMP | Exhaust CMP sensor | (See Exhaust CMP signal ). |
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| 1CA | - | - | - | - | - | |
| 1CB | A/F sensor heater control | A/F sensor heater | (See A/F sensor heater control signal ). |
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| 1CC | - | - | - | - | - | |
| 1CD | - | - | - | - | - | |
| 1CE | OCV for No. 4 cylinder deactivation control (+) | OCV for No. 4 cylinder deactivation | Ignition switched ON (engine off) | B+ |
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| 1CF | OCV for No. 4 cylinder deactivation control (-) | OCV for No. 4 cylinder deactivation | Ignition switched ON (engine off) | B+ |
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| 1CG | - | - | - | - | - | |
| 1CH | - | - | - | - | - | |
| 1CI | OCV for No. 1 cylinder deactivation control (+) | OCV for No. 1 cylinder deactivation | Ignition switched ON (engine off) | B+ |
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| 1CJ | OCV for No. 1 cylinder deactivation control (-) | OCV for No. 1 cylinder deactivation | Ignition switched ON (engine off) | B+ |
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| 1CK | Engine oil control | Engine oil solenoid valve | (See Engine oil control signal ). |
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| 1CL | - | - | - | - | - | |
| 1CM | - | - | - | - | - | |
| 1CN | - | - | - | - | - | |
| 1CO | Hydraulic variable valve timing control | OCV for hydraulic variable valve timing system | (See Hydraulic variable valve timing control signal ). |
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| 1CP | - | - | - | - | - | |
| 1CQ | Drive-by-wire control (+) | Throttle valve actuator | (See Drive-by-wire control (+) signal ). |
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| 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.
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| 1CS | Exhaust shutter valve control (+) | Exhaust shutter valve | Ignition switched ON (engine off) | B+ |
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| 1CT | Exhaust shutter valve control (-) | Exhaust shutter valve | Ignition switched ON (engine off) | B+ |
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| 1CU | Fuel injection control (+) | Fuel injector No. 3 | (See Fuel injection control (+) signal ). |
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| 1CV | Fuel injection control (-) | Fuel injector No. 3 | (See Fuel injection control (-) signal ). |
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| 1CW | Coolant control valve control (+) | Coolant control valve | Ignition switched ON (engine off) | B+ |
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| 1CX | Coolant control valve control (-) | Coolant control valve | Ignition switched ON (engine off) | B+ |
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| 1CY | Fuel injection control (+) | Fuel injector No. 2 | (See Fuel injection control (+) signal ). |
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| 1CZ | Fuel injection control (-) | Fuel injector No. 2 | (See Fuel injection control (-) signal ). |
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| 1DA | - | - | - | - | - | |
| 1DB | - | - | - | - | - | |
| 1DC | Fuel injection control (+) | Fuel injector No. 4 | (See Fuel injection control (+) signal ). |
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| 1DD | Fuel injection control (-) | Fuel injector No. 4 | (See Fuel injection control (-) signal ). |
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| 1DE | - | - | - | - | - | |
| 1DF | - | - | - | - | - | |
| 1DG | Fuel injection control (+) | Fuel injector No. 1 | (See Fuel injection control (+) signal ). |
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| 1DH | Fuel injection control (-) | Fuel injector No. 1 | (See Fuel injection control (-) signal ). |
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| 1DI | High pressure fuel pump control (+) | High pressure fuel pump | (See High pressure fuel pump control (+) signal ). |
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| 1DJ | High pressure fuel pump control (-) | High pressure fuel pump | (See High pressure fuel pump control (-) signal ). |
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| 2A | Battery voltage | Battery | Ignition switched ON (engine off) | B+ |
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| 2B | Main relay control | Main relay | Ignition switched ON (engine off) | Below 1.0 |
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| 2C | - | - | - | - | - | |
| 2D | Fuel pump control | Fuel pump control module | (See Fuel pump control signal ). |
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| 2E | - | - | - | - | - | |
| 2F | Ignition (IG1) | IG1 relay | Ignition switched ON (engine off) | B+ |
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| 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+ |
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| 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 |
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| Brake pedal depressed | B+ | |||||
| 2Q | - | - | - | - | - | |
| 2R | Ambient temperature | Ambient temperature sensor | Ignition switched ON (engine off) | AAT 20 °C {68 °F} | Approx. 2.70 |
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| 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. |
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| 2T | CAN_L | CAN system related modules | Because this terminal is for CAN, integrity determination by terminal voltage is not possible. |
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| 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. |
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| 2Z | - | - | - | - | - | |
| 2AA | - | - | - | - | - | |
| 2AB | Brake (No. 1) | Brake switch (No. 1 signal) | Brake pedal released | Below 1.0 |
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| Brake pedal depressed | B+ | |||||
| 2AC | - | - | - | - | - | |
| 2AD | - | - | - | - | - | |
| 2AE | - | - | - | - | - | |
| 2AF | A/C cut-off control | A/C relay | A/C relay OFF | B+ |
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| 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 |
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| 2AJ | Fuel tank pressure | Fuel tank pressure sensor | Ignition switched ON (engine off) | 2.1-2.6 |
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| 2AK | - | - | - | - | - | |
| 2AL | CV solenoid control | CV solenoid valve | Ignition switched ON (engine off) | B+ |
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| 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 |
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| Cooling fan not operating | B+ | |||||
| 2AN | - | - | - | - | - | |
| 2AO | Constant voltage (Vref) | APP sensor No. 2 | Ignition switched ON (engine off) | Approx. 5.0 |
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| 2AP | - | - | - | - | - | |
| 2AQ | - | - | - | - | - | |
| 2AR | - | - | - | - | - | |
| 2AS | Cooling fan control | Cooling fan relay No. 1, cooling fan relay No. 3 | Cooling fan operating | Below 1.0 |
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| Cooling fan not operating | B+ | |||||
| 2AT | Constant voltage (Vref) | MAF sensor, IAT sensor No. 1 | Ignition switched ON (engine off) | Approx. 5.0 |
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| 2AU | Constant voltage (Vref) | Clutch stroke sensor, fuel tank pressure sensor | Ignition switched ON (engine off) | Approx. 5.0 |
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| 2AV | Refrigerant pressure | Refrigerant pressure sensor | Refrigerant pressure: 1.0 MPa {10 kgf/cm 2 , 145 psi} | Approx. 1.58 |
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| 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+ |
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| Idle (after warm up) | Below 1.0 | |||||
| 2AX | Fuel pump control module (diagnostic) | Fuel pump control module | (See Fuel pump control module (diagnostic) signal ). |
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| 2AY | - | - | - | - | - | |
| 2AZ | Constant voltage (Vref) | Refrigerant pressure sensor | Ignition switched ON (engine off) | Approx. 5.0 |
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| 2BA | Constant voltage (Vref) | APP sensor No. 1 | Ignition switched ON (engine off) | Approx. 5.0 |
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| 2BB | APP (No. 2) | APP sensor No. 2 | Ignition switched ON (engine off) | Accelerator pedal released | Approx. 0.4 |
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| 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+ |
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| 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. |
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| 2BF | - | - | - | - | - | |
| 2BG | GND | APP sensor No. 2 | Under any condition | Below 1.0 |
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| 2BH | GND | APP sensor No. 1 | Under any condition | Below 1.0 |
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| 2BI | - | - | - | - | - | |
| 2BJ | HO2S heater control | HO2S heater | (See HO2S heater control signal ). |
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| 2BK | HO2S (+) | HO2S | Idle (after warm up) | 0-0.7 |
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| 2BL | HO2S (-) | HO2S | Idle (after warm up) | Approx. 2.05 |
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| 2BM | GND | Sensor shield | Under any condition | Below 1.0 |
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| 2BN | APP (No. 1) | APP sensor No. 1 | Ignition switched ON (engine off) | Accelerator pedal released | Approx. 0.8 |
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| Accelerator pedal depressed | Approx. 4.5 | |||||
| 2BO | Main power supply | Main relay | Ignition switched ON (engine off) | B+ |
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| 2BP | - | - | - | - | - | |
| 2BQ | GND | GND | Under any condition | Below 1.0 |
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| 2BR | Main power supply | Main relay | Ignition switched ON (engine off) | B+ |
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| 2BS | - | - | - | - | - | |
| 2BT | GND | GND | Under any condition | Below 1.0 |
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Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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