Engine Control System (L3): Other Mazda 5 I

Without Using the SST

Note. The PCM terminal voltage can vary with the conditions when measuring and changes due to aged deterioration on the vehicle, causing false diagnosis. Therefore determine comprehensively where the malfunction occurs among the input systems, output systems, and the PCM.

PCM CONNECTOR TERMINALS REFERENCE CHART

PCM terminals

1. 1B (+)-body ground (-)

Oscilloscope setting

1. 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition

1. 4GR

Shift solenoid B signal

Scheme 61

1. 1C (+)-body ground (-)

1. 5 V/DIV (Y), 5 ms/DIV (X), DC range

1. 1GR (Except for M range)

Shift solenoid C signal

Scheme 62

1. 1D (+)-body ground (-)

1. 5 V/DIV (Y), 5 ms/DIV (X), DC range

Scheme 63

1. 1GR or 2GR

Pressure control solenoid (+) signal

1. 1G (+) - body ground (-)

1. 5 V/DIV (Y), 1 ms/DIV (X), DC range

Scheme 64

1. All of the following conditions are met. Ignition switch is turned to the ON position, (engine off) P or N position CTP

Pressure control solenoid (-) signal

1. 1H (+)-body ground (-)

1. 200 mV/DIV (Y), 1 ms/DIV (X), DC range

Scheme 65

1. All of the following conditions are met. Ignition switch is turned to the ON position, (engine off) P or N position CTP

Vehicle speed signal (ATX)

1. 1J (+)-body ground (-)

1. 1 V/DIV (Y), 2.5 ms/DIV (X), DC range

1. Vehicle speed is 32 km/h {20 mph}.

Input/turbine speed sensor (+) signal

Scheme 66

1. 1M (+)-body ground (-)

1. 500 mV/DIV (Y), 1 ms/DIV (X), DC range

Scheme 67

1. Idle after warm-up

Input/turbine speed sensor (-) signal

1. 1Q (+)-body ground (-)

1. 500 mV/DIV (Y), 1 ms/DIV (X), DC range

1. Idle after warm-up

Cooling fan control signals

Scheme 68

1W (+)-body ground (-)

1. 5 V/DIV (Y), 1 ms/DIV (X), DC range

Scheme 69

1. Idle after warm up (engine speed approx. 700 RPM, A/C ON)

APP signal

Accelerator pedal is released

1. 1AL (+)-body ground (-)

1. 2.5 V/DIV (Y), 2 ms/DIV (X), DC range

Scheme 70

1. Ignition switch is turned to the ON position, (engine off)

Accelerator pedal is depressed

Scheme 71

HO2S (front) heater control signal

1. 2G (+)-body ground (-)

1. 5 V/DIV (Y), 125 ms/DIV (X), DC range

Scheme 72

1. Idle after warm up (engine speed approx. 650 RPM, no load)

CMP sensor signal

(+)

1. 2U (+)-body ground (-)

1. 1 V/DIV (Y), 25 ms/DIV (X), DC range

Scheme 73

1. Idle after warm up (engine speed approx. 650 RPM, no load)

(-)

1. 2V (+)-body ground (-)

1. 1 V/DIV (Y), 25 ms/DIV (X), DC range

Scheme 74

1. Idle after warm up (engine speed approx. 650 RPM, no load)

CKP sensor signal

(+)

1. 2Y (+)-body ground (-)

1. 2 V/DIV (Y), 10 ms/DIV (X), DC range

Scheme 75

1. Idle after warm up (engine speed approx. 650 RPM, no load)

(-)

1. 2Z (+)-body ground (-)

1. 2 V/DIV (Y), 10 ms/DIV (X), DC range

Scheme 76

1. Idle after warm up (engine speed approx. 650 RPM, no load)

OCV signal

1. 2AF (+)-body ground (-)

1. 2.5 V/DIV (Y), 1 ms/DIV (X), DC range

Scheme 77

1. Idle after warm up (engine speed approx. 650 RPM, no load)

HO2S (front) signal

1. 2AG (+)-body ground (-)

1. 0.2 V/DIV (Y), 500 ms/DIV (X), DC range

Scheme 78

1. Idle after warm up (engine speed approx. 650 RPM, no load)

Generator output voltage signal

1. 2AM (+)-body ground (-)

1. 2 V/DIV (Y), 2.5 ms/DIV (X), DC range

Scheme 79

1. Idle after warm up (engine speed approx. 650 RPM, no load)

Purge control signal

1. 2AN (+)-body ground (-)

1. 2 V/DIV (Y), 0.1 s/DIV (X), DC range

Scheme 80

1. Idle after warm-up

Generator field coil control signal

1. 2AQ (+)-body ground (-)

1. 0.5 V/DIV (Y), 1 ms/DIV (X), DC range

Scheme 81

1. Idle after warm up (engine speed approx. 650 RPM, no load)

Fuel injection control

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 (-)

1. 10 V/DIV (Y), 25 ms/DIV (X), DC range

Scheme 82

1. Idle after warm up (engine speed approx. 650 RPM, no load)

IGT1, IGT2, IGT3, IGT4 control signals

1. IGT1 (No.1): 2BE (+)-body ground (-)
2. IGT2 (No.2): 2BF (+)-body ground (-)
3. IGT3 (No.3): 2BG (+)-body ground (-)
4. IGT4 (No.4): 2BH (+)-body ground (-)

1. 10 V/DIV (Y), 25 ms/DIV (X), DC range

Scheme 83

1. Idle after warm up (engine speed approx. 650 RPM, no load)

Using SST (WDS or Equivalent)

Note. PIDs for the following parts are not available on this model. Go to the appropriate part inspection page. CMP sensor (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [L3] ). Main relay (See RELAY INSPECTION ).

Scheme 84

1. Connect the SST (WDS or equivalent) to the DLC-2.
2. Turn the ignition switch to ON position.
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. The simulation items that are used in the ENGINE CONTROL SYSTEM OPERATION INSPECTION are as follows. ACCS, ALTF, ARPMDES, ECT_DSD, EVAPCP, FAN_DUTY, FP, FUELPW1, GENVDSD, HTR11, HTR12, IMRC, IMTV, INJ_1, INJ_2, INJ_3, INJ_4, LPS, SEGRP, SSA/SS1, SSB/SS2, SSC/SS3, SSD/SS4, SSE/SS5, VT ACT1, VT DUTY

PID/DATA MONITOR REFERENCE CHART

PCM CONFIGURATION [L3]

1. Connect the WDS or equivalent to the DLC-2.
2. Set up the WDS or equivalent (including the vehicle recognition).
3. Select "Module Programming".
4. Select "Programmable Module Installation".
5. Select "PCM" and perform procedures according to directions on the WDS or equivalent screen. NOTE: If the PCM is replaced with a new one, the PCM stores DTC P0602 and illuminates the MIL even though no malfunction is detected. This means the PCM has not been configured yet.
6. Retrieve DTC's by the WDS or equivalent, then verify that there in no DTC present. If DTC is present, perform applicable DTC inspection. (See «DTC TABLE [L3]»(ref-244323-S35277163902006092100000) ).