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Home >> Mazda >> 2022 >> MX-5 Miata RF Club >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> On-Board Diagnostics - Electric Vacuum Pump (EVP) >> DTC Inspection [EVP Control Unit] >> Snapshot Data Table

Snapshot Data Table

NOTE:
  • Refer to PID monitor table for confirm the EVP system operation status while the EVP control unit does not store the DTC. (See PID/DATA MONITOR TABLE [EVP CONTROL UNIT] .)
  • Snapshot data items are not displayed, according to detected DTC.

-: Not applicable

SNAPSHOT DATA PART DESCRIPTION

Snapshot data item Unit Definition Data read/use method Corresponding data monitor items
AAT °C, °F Ambient air temperature - -
APP_STATUS Accelerator Pedal Off/Under 20%/Over 20%/FAIL Accelerator pedal position - -
BRK_SIG Off/On Brake pedal signal - BRK SIG
CFG_STATUS Config Complete/Not Configured/Config Error Configuration status - -
ECT_STATUS Under 0 degrees C/ Engine coolant temperature - -
  0 - Under 80 degrees C/Over 80 degrees C/FAIL status    
ECU_TEMP °C, °F ECU internal temperature - ECU_TEMP
IC_VPWR V Instrument cluster power supply
  • The EVP control unit constantly receives the power supply voltage value of the instrument cluster sent via CAN signal from the instrument cluster.
  • If a DTC is detected, the EVP control unit records the power supply voltage of the instrument cluster when the DTC was detected, and it is displayed in the M-MDS.
 -
IG-ON_TIMER hh:mm:ss (1) Elapsed time since ignition was switched ON
NOTE:
  • The instrument cluster records the elapsed time since the ignition was switched ON.
  • The EVP control unit constantly receives the elapsed time since the ignition was switched ON sent via CAN signal from the instrument cluster.
  • If a DTC is detected, the EVP control unit records the elapsed time since the ignition was switched ON when the DTC was detected, and it is displayed in the M-MDS.
 -
PWR_MODE_KEY Key Out/Key Recently Out/Key Approved (Position 0)/Post Accessory (Position 0)/Accessory (Position 1)/Post Ignition (Position 1)/Ignition On (Position 2)/Running (Position 2)/Running-Starting In Progress (Position 2)/Crank (Position 3)
  • Key Out: Ignition switched off
  • Key Recently Out (Position 0): Elapsed time within 3 s since ignition was switched off
  • Accessory (Position 1): Ignition is switched to ACC
  • Post Ignition (Position 2): Elapsed time within 3 s since ignition was switched ON
  • Ignition On (Position 2): Ignition switched ON (engine off)
  • Running (Position 2): Ignition switched ON (engine on)
  • Running - Starting: Cranking condition
  • The EVP control unit constantly receives the ignition switch status sent via CAN signal from the instrument cluster.
  • If a DTC is detected, the EVP control unit records the ignition switch status when the DTC was detected, and it is displayed in the M-MDS.
 -
RPM_STATUS Engine Stop/Under 1500 rpm/Over 1500 rpm/FAIL Engine RPM status
  • The EVP control unit constantly receives the engine speed sent via CAN signal from the instrument cluster.
  • If a DTC is detected, the EVP control unit records the engine speed when the DTC was detected, and it is displayed in the M-MDS.
 -
SHIFT_STATUS P/N D/R/FAIL Shift position status
  • The EVP control unit constantly receives the selector lever position sent via CAN signal from the instrument cluster.
  • If a DTC is detected, the EVP control unit records the selector lever position when the DTC was detected, and it is displayed in the M-MDS.
 -
TOTAL_DIST km, ft, mi Accumulated total traveled distance from completion of vehicle until EVP control unit detects DTC (Odometer value in instrument cluster) The distance traveled when the EVP control unit detected a DTC can be calculated by performing the following procedure.
  1. Verify the odometer value in the instrument cluster.
  2. Verify the snapshot data item TOTAL_DIST.
  3. Subtract 2 from 1.
 -
TOTAL_TIME hh:mm:ss (1) Accumulated total elapsed time since vehicle completion until EVP control unit detects a DTC
NOTE:
  • When the ROOM fuse is removed, and the ignition is switched off, the time is not included in the elapsed time.
 The elapsed time when the EVP control unit detected a DTC can be calculated by performing the following procedure.
  1. Verify the PID item TOTAL_TIME of the instrument cluster.
  2. Verify the snapshot data item TOTAL_TIME.
  3. Subtract 2 from 1.
  
VP_C A Electric vacuum pump operation current - VP_C
VP_MV V Electric vacuum pump terminal voltage (-) - VP_MV
VP_PV V Electric vacuum pump terminal voltage (+) - VP_PV
VPD_THR kPa, mmHg, inHg Electric vacuum pump deactivation threshold
  • If the power brake unit vacuum is larger than the value which is calculated by subtracting VPD_THR from barometric pressure, the electric vacuum pump is deactivated
 - VPD_THR
VPR1_V Off/On Electric vacuum pump relay 1 status - VPR1_V
VPR2_V Off/On Electric vacuum pump relay 2 status - VPR2_V
VPS_FBK Off/On Electric vacuum pump status (feedback value) - VPS_FBK
VPWR V Power supply - VPWR
VS1 kPa, mmHg, inHg Power brake unit vacuum (absolute pressure) detected by vacuum sensor 1 - VS1
VS1_V V iVacuum sensor 1 power supply - VS1_V
VS2 kPa, mmHg, inHg Power brake unit vacuum (absolute pressure) detected by vacuum sensor 2 - VS2
VSPD_STATUS Stop/0 - 10 km/h/Over 10 km/h/FAIL Vehicle speed status
  • The EVP control unit constantly receives the vehicle speed sent via CAN signal from the instrument cluster.
  • If a DTC is detected, the EVP control unit records the vehicle speed when the DTC was detected, and it is displayed in the M-MDS.
 -
(1) Fractions of seconds may be indicated after the decimal point
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