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DTC INSPECTION [START STOP UNIT]

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2016 – MX-5 – Body and Accessories

DTC INSPECTION [START STOP UNIT]

CMDTC Self Test

1. Connect the M-MDS to the DLC-2.

2. After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

a. Select “Self Test”.

b. Select “All CMDTCs”.

3. Verify the DTC according to the directions on the screen.

  • If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection after recording the snapshot data. (See DTC TABLE [START STOP UNIT].)

4. After completion of repairs, clear all DTCs stored in the start stop unit. (See CLEARING DTC [START STOP UNIT].)

ODDTC Self Test

1. Connect the M-MDS to the DLC-2.

2. After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

a. Select “Self Test”.

b. Select “Modules”.

c. Select “SSU”.

3. Verify the DTC according to the directions on the screen.

  • If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection after recording the snapshot data. (See DTC TABLE [START STOP UNIT].)

4. After completion of repairs, clear all DTCs stored in the start stop unit. (See CLEARING DTC [START STOP UNIT].)

Snapshot Data

NOTE:

  • The start stop unit stores the following two types of snapshot data (vehicle information) when a DTC is detected and displays them in the M-MDS.

    • Vehicle information detected by start stop unit

    • Vehicle information detected by instrument cluster and received by start stop unit via CAN communication

  • The data for all DTCs currently detected is stored.

—: Not applicable

Snapshot data item

Unit

Data contents

Data read/use method

Corresponding data monitor items

AAT

°C

°F

Ambient temperature

—

—

APP_STATUS

Accelerator Pedal Off/Under20%/Over20%/FAIL

Accelerator pedal position status

—

—

CFG_STATUS

Config Complete/Not Configured/Config Error

Instrument cluster configuration status

—

—

ECT_STATUS

Under 0 degrees C/0 – Under 80 degrees C/Over 80 degrees C/FAIL

Engine coolant temperature status

—

—

IC_VPWR

V

Instrument cluster power supply voltage

  • The start stop unit constantly receives the power supply voltage value of the instrument cluster sent via CAN communication from the instrument cluster.

  • If a DTC is detected, the start stop unit records the power supply voltage of the instrument cluster when the DTC was detected, and it is displayed in the M-MDS.

VPWR*1

IG-ON_TIMER

hh:mm:ss*2

Elapsed time since ignition was switched ON (engine off or on)

NOTE:

  • The instrument cluster records the elapsed time since the ignition was switched ON (engine off or on).

  • The start stop unit constantly receives the elapsed time since the ignition was switched ON (engine off or on) sent via CAN communication from the instrument cluster.

  • If a DTC is detected, the start stop unit records the elapsed time since the ignition was switched ON (engine off or on) when the DTC was detected, and it is displayed in the M-MDS.

—

PWR_MODE_KEY

Key Out/Key Recently Out (Position 0)/Accessory (Position 1)/Post Ignition (Position 2)/Ignition On (Position 2)/Running (Position 2)/Running – Starting In Progress (Position 2)

  • 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 (engine off or on)

  • Ignition On (Position 2): Ignition switched ON (engine off)

  • Running (Position 2): Ignition switched ON (engine on)

  • Running – Starting: Cranking condition

  • The start stop unit constantly receives the ignition switch status sent via CAN communication from the instrument cluster.

  • If a DTC is detected, the start stop unit records the ignition switch status when the DTC was detected, and it is displayed in the M-MDS.

—

RPM_STATUS

Engine Stop/Under1500rpm/Over1500rpm/FAIL

Engine speed status

  • The start stop unit constantly receives the engine speed sent via CAN communication from the instrument cluster.

  • If a DTC is detected, the start stop unit records the engine speed when the DTC was detected, and it is displayed in the M-MDS.

TACHOMTR*1

SHIFT_STATUS

P/N/D/R/FAIL

Selector lever position status

  • The start stop unit constantly receives the selector lever position sent via CAN communication from the instrument cluster.

  • If a DTC is detected, the start stop unit records the selector lever position when the DTC was detected, and it is displayed in the M-MDS.

—

TOTAL_DIST

km

Miles

Accumulated total traveled distance from completion of vehicle until start stop unit detects DTC (Odometer value in instrument cluster)

The total traveled distance from which the start stop unit detects DTCs to the present can be calculated by performing the following procedure.

  • Verify the odometer value in the instrument cluster.

  • Verify the snapshot data item TOTAL_DIST.

  • Subtract 2 from 1.

—

TOTAL_TIME

hh:mm:ss*2

Accumulated total elapsed time since vehicle completion until start stop 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 from which the start stop unit detects DTCs to the present can be calculated by performing the following procedure.

  • Verify the instrument cluster PID item TOTAL_TIME.

  • Verify the snapshot data item TOTAL_TIME.

  • Subtract 2 from 1.

TOTAL_TIME*1

TRNS_NUM_L

Initial/No.1/No.2/No.3/No.4/No.5/No.6

Registration number of the remote transmitter

If the start stop unit detects DTC B13D3:16 (Low remote transmitter battery voltage), inspect the remote transmitter in which the malfunction is occurring using the following procedure to display the registration number of the remote transmitter that was operated.

  • Verify the registration number of the remote transmitter in the snapshot data.

  • Display the start stop unit PID item RF_TRNS_NUM and inspect the battery voltage of the remote transmitter having the same registration number as the recorded remote transmitter registration number.

—

VPWR

V

Start stop unit power supply voltage

—

VPWR_B2

VPWR_B1

V

Start stop unit power supply voltage (ROOM fuse)

—

VPWR_B1

VSPD_STATUS

Stop/0-10km/h/Over10km/h/FAIL

Vehicle speed status

  • The start stop unit constantly receives the vehicle speed sent via CAN communication from the instrument cluster.

  • If a DTC is detected, the start stop unit records the vehicle speed when the DTC was detected, and it is displayed in the M-MDS.

SPEEDOMTR*1

*1
Instrument cluster PID (See PID/DATA MONITOR TABLE [INSTRUMENT CLUSTER].)
*2
The seconds may be indicated after the decimal point.

Verifying DTCs Using Security Indicator Light (Immobilizer System)

NOTE:

  • If multiple DTCs are detected, only those having the lowest numbers of those detected will be indicated by the security indicator light.

  • A DTC is displayed 10 times by switching the ignition ON (engine off or on) once.

1. Switch the ignition ON (engine off or on).

2. Wait for approx. 1 min until the security indicator light displays a DTC.

NOTE:

  • In the approx. 1 min after detecting a malfunction and before displaying the DTC, the security indicator light turns on, flashes, or turns off in the following patterns:

Security indicator light flash pattern

(before displaying DTC)

DTC

09, 11, 13, 15, 16

21

22, 23

3. Read DTCs by the number of times the security indicator light flashes as shown in the figure.

Example: DTC 13

4. Repair the malfunctioning part according to the applicable DTC troubleshooting based on the DTC which was verified by the number of times the security indicator light flashed. (See DTC TABLE [START STOP UNIT].)

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