Engine Control System [Mzr 2.0, Mzr 2.5]: Other Mazda 3 BM

Using M-MDS

Note. PIDs for the following parts are not available on this model. Go to the appropriate part inspection page. CMP sensor Main relay

Scheme 42

1. Connect the M-MDS to the DLC-2. (Scheme 42): Identifying DLC-2 Location
2. Switch the ignition to ON.
3. Measure the PID value. If PID value is not within the specification, follow the instructions in Action column. NOTE: The PID/DATA MONITOR function monitors the calculated value of the input/output signals in the PCM. Therefore, an output device malfunction is not directly indicated as a malfunction of the monitored value for the output device. If a monitored value of an output device is out of specification, inspect the monitored value of the input device related to the output control. For input/output signals except those of the monitoring items, use a voltmeter to measure the PCM terminal voltage. The simulation items that are used in the ENGINE CONTROL SYSTEM OPERATION INSPECTION are as follows. ACCS, ALTF, ARPMDES, EVAPCP, EVAPCV, FAN_DUTY, FP, IMRC, IMTV, INJ_1~4, SEGRP, TEST, VT Duty1 wt PID/DATA monitor table (reference) Monitor item (Definition) Unit/Condition Condition/Specification (Reference) Inspection item PCM terminal AAT (Ambient air temperature) °C °F Indicates the ambient air temperature IAT sensor 1AT AC_REQ (A/C request signal) OFF/ON A/C switch OFF: OFF A/C switch ON: ON Perform applicable DTC troubleshooting - ACCS (A/C relay) OFF/ON A/C relay OFF: OFF A/C relay ON: ON A/C relay Inspect following PIDs: RPM, TP REL, ECT. 1I AFR (Target air fuel ratio) - Target air fuel ratio is displayed A/F sensor 2Z 2AC 2AD AFR_ACT (Actual air fuel ratio) - Actual air fuel ratio is displayed A/F sensor 2Z 2AC 2AD ALTF (Generator field coil control duty value) % Just after A/C switch ON and fan switch ON at idle: Duty value rises Generator Inspect following PIDs: IAT, ECT, RPM, VPWR, ALTT V. 2AA ALTT V (Generator output voltage) V Switch the ignition to ON: 0 V Idle: approx. 14 V (1) (E/L not operating) Generator 2AF APP (APP sensor) % Accelerator pedal released: approx. 0 % Accelerator pedal depressed: approx. 100 % APP sensor 1X 1AP APP 1 (APP sensor No.1) % Accelerator pedal released: approx. 15 % Accelerator pedal depressed: approx. 80 % APP sensor 1AP V Accelerator pedal released: approx. 0.4 V Accelerator pedal depressed: approx. 3.3 V APP 2 (APP sensor No.2) % Accelerator pedal released: approx. 7.5 % Accelerator pedal depressed: approx. 42 % APP sensor 1X V Accelerator pedal released: approx. 0.4 V Accelerator pedal depressed: approx. 2.0 V ARPMDES (Target engine speed) RPM Indicate the target engine speed Inspect following PIDs: IAT, RPM, MAP, ECT, MAF, TP REL, INGEAR, ALTT V. - BARO (Barometric pressure) kPa, psi, Bar Indicate the BARO BARO sensor - V Switch the ignition to ON (at sea level): approx. 4.1 V BOO (Brake switch) OFF/ON Brake pedal depressed: ON Brake pedal released: OFF Brake switch No.1 1AB BPA (Brake pressure applied switch) OFF/ON Brake pedal depressed: ON Brake pedal released: OFF Brake switch No.2 - CATT11_DSD (Desired catalyst temperature bank one, sensor one) °C Indicate the estimated catalytic converter temperature Perform applicable DTC troubleshooting. - CHRGLP (Generator warning light) OFF/ON Switch the ignition to ON: ON Idle: OFF Perform applicable DTC troubleshooting. - COLP (Refrigerant pressure sensor) OFF/ON Refrigerant pressure is above 1.96 Mpa {20.0kgf/cm (2), 284 psi}: ON Refrigerant pressure sensor - CPP (2) (Clutch pedal position) OFF/ON Clutch pedal depressed: ON Clutch pedal released: OFF CPP switch 1BD CPP/PNP (2) (Shift lever position) OFF/ON Neutral position: ON Others: OFF Neutral switch 1BC ECT (Engine coolant temperature No.1) °C °F Indicate the ECT No.1 ECT sensor No.1 2AH V ECT 20 °C {68 °F}: 3.04-3.14 V ECT 80 °C {176 °F}: 0.76-0.83 V ECT2 (Engine coolant temperature No.2) °C °F Indicate the ECT No.2 ECT sensor No.2 2AO V ECT 20 °C {68 °F}: 3.04-3.14 V ECT 80 °C {176 °F}: 0.76-0.83 V EQ_RAT11 (Equivalence ratio (lambda)) - Idling after warm-up: approx. 1 Perform applicable DTC troubleshooting. 2Z 2AC 2AD EQ_RAT11_DSD (Desired equivalence ratio (lambda)) - Idling after warm-up: approx. 1 Perform applicable DTC troubleshooting. - ETC_ACT (Electronic throttle control actual) ° Indicate the desired TP by angle Perform applicable DTC troubleshooting. 2BE, 2BF ETC_DSD (Electronic throttle control desired) % Indicate the desired TP by percent TP sensor Inspect following PIDs:APP1, APP2, ETC_ACT. - ° Indicate the desired TP by angle EVAPCP (Purge solenoid valve duty value) % Switch the ignition to ON: 0% Idle: 0% Inspect following PIDs: IAT, RPM, ECT, MAF, O2S11, INGEAR, VPWR. 1BA EVAPCV (Evaporative emission canister vent valve) OFF/ON Simulation item (EVAPCV) is ON: ON CV solenoid valve 1M FAN_DUTY (Fan control module) - When all of following condition are met: 50% Test mode ON WOT Fan control module 1R FCL (Fuel cap warning light) OFF/ON Fuel cap warning light not illuminated: OFF Fuel cap warning light illuminated: ON Perform applicable DTC troubleshooting. - FLI (Fuel level) Fuel gauge level F: approx. 100% Fuel gauge level E: approx. 0% Perform applicable DTC troubleshooting. - FP (Fuel pump relay) OFF/ON Switch the ignition to ON: OFF Idle: ON Cranking: ON Fuel pump relay Inspect following PIDs: RPM. 1BG FTP (Fuel tank pressure sensor) kPa, psi, Bar Indicate the fuel tank pressure Fuel tank pressure sensor 1AH V Fuel tank pressure is equal to barometric pressure: approx. 2.625 V FUELPW (Fuel injector duration) sec Idle (after warm up): approx. 2.2 ms Fuel injector Inspect following PIDs: IAT, MAF, TP REL, MAP, ECT, RPM, O2S11, O2S12, INGEAR, VPWR, ALTT V. 2AZ 2BB 2BC 2BD FUELSYS (Fuel system status) OL/CL/CL-Fault/OL-Fault/OL-Drive Idle (after warm up): CL Fuel injector Inspect following PIDs: IAT, MAF, TP REL, MAP, ECT, RPM, O2S11, O2S12, INGEAR, VPWR, ALTT V. - HTR11 (A/F sensor heater) OFF/ON Idle (after warm up): ON OFF A/F sensor Inspect following PIDs: IAT, MAF, TP REL, ECT, RPM. 2A HTR12 (HO2S heater) OFF/ON Idle (after warm up): ON OFF HO2S heater Inspect following PIDs: IAT, MAF, ECT, RPM. 2B IAT (Intake air temperature) °C °F Indicate the IAT IAT sensor 1AC V IAT 20 °C {68 °F}: approx. 2.38 V IAT 60 °C {140 °F}: approx. 0.89 V IMRC (Variable tumble solenoid valve) OFF/ON ECT below 60 °C {140 °F} (MZR 2.0) / 63 °C {145 °F} (MZR 2.5) and engine speed below 3,750 rpm: On ECT above 60 °C {140 °F} (MZR 2.0) / 63 °C {145 °F} (MZR 2.5) while idling.: Off Variable tumble solenoid valve Inspect following PIDs: TP REL, ECT, RPM. 2I IMRC_POS (Variable tumble shutter valve switch) V ECT below 60 °C {140 °F} (MZR 2.0) / 63 °C {145 °F} (MZR 2.5) and engine speed below 3,750 rpm: 3.408-4.432 V ECT above 60 °C {140 °F} (MZR 2.0) / 63 °C {145 °F} (MZR 2.5) while idling.: 0.808-1.832 V Variable tumble shutter valve switch 2R IMTV (Variable Intake air control solenoid valve) OFF/ON Engine speed is below approx. 4,400 rpm (MZR 2.0) / 4,600rpm (MZR 2.5): On Others: Off Variable intake air control solenoid valve Inspect following PIDs: RPM. 2J INGEAR (Load/no load condition) OFF/ON MTX When the following conditions are satisfied: On Other than neutral Clutch pedal released Except above: Off CPP switch Neutral switch 1BC IBD ATX Driving range: On Except above: Off TR switch - ISC_FBK (ISC feedback value) - ISC feedback value is displayed PCM - ISC_FBK_LRN (ISC feedback learning value) - ISC feedback learning value is displayed. PCM - IVS (CTP condition) Idle/Off_Idle CTP: Idle Others: Off Idle Perform applicable DTC troubleshooting. - KNOCKR (Knocking retard) ° Switch the ignition to ON: 0° Idle: 0° KS 2U 2V LOAD (Engine load) % Switch the ignition to ON: 0% Idle (after warm up): approx.15% Inspect following PIDs: MAP, IAT, MAF, RPM. - LONGFT1 (long term fuel trim (A/F sensor)) % Idle (after warm up): -15-20% Perform applicable DTC troubleshooting. - LONGFT12 (long term fuel trim (HO2S)) % Indicate the fuel learning correction amount (HO2S) Perform applicable DTC troubleshooting. - MAF (Mass airflow) g/sec Indicate the MAF MAF sensor 1AK V Switch the ignition to ON: approx. 0.7 V Idle (after warm up): approx. 1.2 V MAP (Manifold absolute pressure) kPa, psi, Bar Indicate the MAP MAP sensor 2AG V Switch the ignition to ON (at sea level): approx. 4.1 V Idle: approx. 1.2 V MIL (Malfunction indicator lamp) OFF/ON DTC stored: On DTC not stored: Off Perform applicable DTC troubleshooting. - MIL_DIS (Travelled distance since the MIL illuminated) km miles Indicate the travelled distance since the MIL illuminated O2S11 (A/F sensor) A Idle (After warm up): approx. 0 mA A/F sensor 2Z 2AC 2AD O2S12 (HO2S) V Idle (After warm up): 0-1.0 V HO2S 2Q RO2FT1 (HO2S fuel trim) % Idle (after warm up): approx. -0.03-0.03 Perform applicable DTC troubleshooting. - RPM (Engine speed) RPM Indicate the engine speed CKP sensor 2W SC_CANCEL (3) (CANCEL switch) Inactive/Active CANCEL switch pressed in: Active Except above: Inactive Cruise control switch 1AQ SC_OFF (3) (ON/OFF switch) Inactive/Active ON/OFF switch pressed in (OFF): Active Except above: Inactive Cruise control switch 1AQ SC_ON (3) (ON/OFF switch) Inactive/Active ON/OFF switch pressed in (ON): Active Except above: Inactive Cruise control switch 1AQ SC_RES (3) (RESUME switch) Inactive/Active RESUME switch pressed in: Active Except above: Inactive Cruise control switch 1AQ SC_SET - (3) (SET(-) switch) Inactive/Active SET(-) switch pressed in: Active Except above: Inactive Cruise control switch 1AQ SC_SET + (3) (SET(+) switch) Inactive/Active SET(+) switch pressed in: Active Except above: Inactive Cruise control switch 1AQ SCCS (3) (Cruise control switch) V ON/OFF switch pressed in (OFF): approx. 0 V CANCEL switch pressed in: approx. 1.3 V SET(-) switch pressed in: approx. 2.4 V SET(+) switch pressed in: approx. 3.2 V RESUME switch pressed in: approx. 3.9 V ON/OFF switch pressed in (ON): approx. 4.3 V Cruise control switch 1AQ SEGRP (EGR valve (stepping motor) position) - Switch the ignition to ON: 0 Idle: 0 step Cranking: 0-52 EGR valve Inspect following PIDs: MAF, TP REL, ECT, RPM, VSS. 2AT, 2AX, 2AW, 2BA SEGRP DSD (Desired EGR valve position) % Indicate the desired EGR valve position Inspect following PIDs: MAF, TP REL, ECT, RPM, VSS. - SHRTFT1 (Short term fuel trim (A/F sensor)) % Idle (after warm up): approx.-25-25% Perform applicable DTC troubleshooting. - SHRTFT12 (Short term fuel trim (HO2S)) % Indicate the fuel feedback correction amount (HO2S) Perform applicable DTC troubleshooting. - SPARKADV (Ignition timing) ° Indicate the ignition timing Inspect following PIDs: MAF, TP REL, ECT, RPM, INGEAR, VPWR. 2G, 2H, 2K, 2L Test (Test mode) OFF/ON Test mode ON: On Test mode OFF: Off - - THM_1 (Thermostat monitor engine coolant temperature No.1) °C °F Indicates engine coolant temperature No.1 when thermostat monitoring is finished Thermostat - THM_2 (Thermostat monitor engine coolant temperature No.2) °C °F Indicates engine coolant temperature No.2 when thermostat monitoring is finished Thermostat - THM_MAX_2 (Thermostat monitor engine coolant temperature No.2 max limit) °C °F Indicates upper limit of engine coolant temperature No.2 for thermostat monitoring execution Thermostat - THM_MIN_1 (Thermostat monitor engine coolant temperature No.1 min limit) °C °F Indicates lower limit of engine coolant temperature No.1 for thermostat monitoring execution Thermostat - THM_MIN_2 (Thermostat monitor engine coolant temperature No.2 min limit) °C °F Indicates lower limit of engine coolant temperature No.2 for thermostat monitoring execution Thermostat - TP REL (Relative throttle position) % Accelerator pedal released: approx. 3% Accelerator pedal depressed: approx. 75% TP sensor 2AK 2AL TP 1 (TP sensor No.1) % Accelerator pedal released: approx. 12% Accelerator pedal depressed: approx. 84% TP sensor 2AK V Accelerator pedal released: approx. 0.7 V Accelerator pedal depressed: approx. 4.4 V TP 2 (TP sensor No.2) % Accelerator pedal released: approx. 12% Accelerator pedal depressed: approx. 84% TP sensor 2AL V Accelerator pedal released: approx. 4.3 V Accelerator pedal depressed: approx. 0.6 V TPCT (TP sensor voltage at CTP) V approx. 0.5 V TP sensor 2AK 2AL VPWR (Battery positive voltage) V Switch the ignition to ON: B+ Battery 1C VSS (Vehicle speed) KPH Indicate the vehicle speed Perform applicable DTC troubleshooting. - VT ACT1 (Actual valve timing) ° Idle: approx. 0° Racing after warm up: 0-25° CMP sensor 2S VT DIFF1 (Difference between target and actual valve timing) ° Idle: approx. 0° CMP sensor OCV Inspect following PIDs: TP REL, ECT, RPM. 2E 2S VT DUTY1 (Oil control valve duty value) - Idle: approx. 11.5% OCV Inspect following PIDs: TP REL, ECT, RPM. 2E (1) Calculated value; differs from terminal voltage (2) MTX (3) With cruise control switch Following PIDs are for the ATX models. If inspects for following PIDs, (See «ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [FS5A-EL]»(ref-579360-S11860656252013100700000).)

Without Using the M-MDS

1. Measure the voltage at each terminal. If any incorrect voltage is detected, inspect the related system(s), wiring harnesses and connector(s) referring to the Action column in the terminal voltage table.

PCM Harness Connector Terminal Identification. Scheme 43

Cooling Fan Control Waveform Graph. Scheme 44

PCM terminals

1. 1R(+)-body ground(-) Oscilloscope setting
2. 5 V/DIV (Y), 20 ms/DIV (X), DC range Vehicle condition
3. Idle after warm up

APP sensor No.2 signal

Accelerator pedal released

APP Sensor No.2 Signal Waveform Graph - Accelerator Pedal Released. Scheme 45

Accelerator pedal depressed

APP Sensor No.2 Signal Waveform Graph - Accelerator Pedal Depressed. Scheme 46

PCM terminals

1. 1X(+)-body ground(-) Oscilloscope setting
2. 2.5 V/DIV (Y), 2 ms/DIV (X), DC range Vehicle condition
3. Switch the ignition to ON.

Purge Control Waveform Graph. Scheme 47

PCM terminals

1. 1BA(+)-body ground(-) Oscilloscope setting
2. 10 V/DIV (Y), 20 ms/DIV (X), DC range Vehicle condition
3. Idle after warm up

A/F Sensor Heater Control Waveform Graph. Scheme 48

PCM terminals

1. 2A(+)-body ground(-) Oscilloscope setting
2. 5 V/DIV (Y), 200 ms/DIV (X), DC range Vehicle condition
3. Idle (immediately after starting the engine)

HO2S Heater Control Waveform Graph. Scheme 49

PCM terminals

1. 2B(+)-body ground(-) Oscilloscope setting
2. 5 V/DIV (Y), 1 s/DIV (X), DC range Vehicle condition
3. Idle (immediately after starting the engine)

OCV Control Signal Waveform Graph. Scheme 50

PCM terminals

1. 2E(+)-body ground(-) Oscilloscope setting
2. 2 V/DIV (Y), 0.8 ms/DIV (X), DC range Vehicle condition
3. Idle after warm up

CMP Signal Waveform Graph. Scheme 51

PCM terminals

1. 2S(+)-body ground(-) Oscilloscope setting
2. 1 V/DIV (Y), 25 ms/DIV (X), DC range Vehicle condition
3. Idle after warm up

CKP Signal Waveform Graph. Scheme 52

PCM terminals

1. 2W(+)-body ground(-) Oscilloscope setting
2. 1 V/DIV (Y), 5 ms/DIV (X), DC range Vehicle condition
3. Idle after warm up

IGT1, IGT2, IGT3, IGT4 Control Waveform Graph. Scheme 53

PCM terminals

1. IGT1(ignition coil No.1): 2G(+)-body ground(-)
2. IGT2(ignition coil No.2): 2K(+)-body ground(-)
3. IGT3(ignition coil No.3): 2L(+)-body ground(-)
4. IGT4(ignition coil No.4): 2H(+)-body ground(-) Oscilloscope setting
5. 1 V/DIV (Y), 50 ms/DIV (X), DC range Vehicle condition
6. Idle after warm up

Generator Field Coil Control Waveform Graph. Scheme 54

PCM terminals

1. 2AA(+)-body ground(-) Oscilloscope setting
2. 0.5 V/DIV (Y), 2 ms/DIV (X), DC range Vehicle condition
3. Idle after warm up

Generator Output Voltage Waveform Graph. Scheme 55

PCM terminals

1. 2AF(+)-body ground(-) Oscilloscope setting
2. 2 V/DIV (Y), 2 ms/DIV (X), DC range Vehicle condition
3. Idle after warm up

Fuel Injection (#1, #2, #3, #4) Control Waveform Graph. Scheme 56

PCM terminals

1. Fuel Injection No.1: 2BB(+)-body ground(-)
2. Fuel Injection No.2: 2BC(+)-body ground(-)
3. Fuel Injection No.3: 2BD(+)-body ground(-)
4. Fuel Injection No.4: 2AZ(+)-body ground(-) Oscilloscope setting
5. 10 V/DIV (Y), 25 ms/DIV (X), DC range Vehicle condition
6. Idle after warm up

PCM CONFIGURATION [MZR 2.0, MZR 2.5]

Scheme 57

1. Connect the M-MDS (IDS) to DLC-2. (Scheme 57): Identifying DLC-2 Location
2. After the vehicle is identified, select the following items from the initial screen of the M-MDS (IDS). "Module Programming"
3. Select "Programmable Module Installation".
4. Select menu in the "PCM".
5. Perform the configuration according to the directions on the screen.
6. Retrieve DTCs by the M-MDS (IDS), then verify that there is no DTC present. If a DTC(s) is detected, perform the applicable DTC inspection. (See «DTC TABLE [MZR 2.0, MZR 2.5]»(ref-579388-S03460948932013100700000).)

Scheme 58

1. Verify that the CPP switch is installed properly. (See «CLUTCH PEDAL REMOVAL/INSTALLATION [G35M-R]»(ref-579362-S20636054242013100700000).) (See «CLUTCH PEDAL REMOVAL/INSTALLATION [G66M-R]»(ref-579422-S12797634032013100700000).)
2. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
3. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
4. Disconnect the CPP switch connector. (See «CLUTCH PEDAL REMOVAL/INSTALLATION [G35M-R]»(ref-579362-S20636054242013100700000).) (See «CLUTCH PEDAL REMOVAL/INSTALLATION [G66M-R]»(ref-579422-S12797634032013100700000).)
5. Verify that the continuity between CPP switch terminals A and B when the clutch pedal is depressed and when it is released is according to the following table: (Scheme 58): Testing CPP Switch If not as verified, replace the CPP switch. (See «CLUTCH PEDAL REMOVAL/INSTALLATION [G35M-R]»(ref-579362-S20636054242013100700000).) (See «CLUTCH PEDAL REMOVAL/INSTALLATION [G66M-R]»(ref-579422-S12797634032013100700000).)

Scheme 59

1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
3. Disconnect the neutral switch connector. (See «NEUTRAL SWITCH REMOVAL/INSTALLATION [G35M-R]»(ref-579423-S10086559152013100700000).) (See «NEUTRAL SWITCH REMOVAL/INSTALLATION [G66M-R]»(ref-579424-S38647903262013100700000).)
4. When the shift lever is in neutral and in a position other than neutral, verify that the continuity between neutral switch terminals A and B is according to the following table: (Scheme 59): Inspecting Neutral Switch If not as verified, replace the neutral switch. (See «NEUTRAL SWITCH REMOVAL/INSTALLATION [G35M-R]»(ref-579423-S10086559152013100700000).) (See «NEUTRAL SWITCH REMOVAL/INSTALLATION [G66M-R]»(ref-579424-S38647903262013100700000).)