Description

Downstream side of starter relay signal malfunction

Detection condition

• Start stop unit detects that the following signals are unmatched for 0.5 s or more for a continuous 5 times.

• Transmission range switch (AT)/starter interlock switch (MT) condition

• Starter relay downstream circuit condition

• PCM control result

• CAN signal condition output from PCM

Fail-safe

Not applicable

Possible cause

• DTCs are stored in the PCM.

• PCM malfunction

• Start stop unit malfunction

System wiring diagram

Not applicable

Step

Inspection

Action

1

• Retrieve the PCM DTCs using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Are any DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

No

Go to the next step.

2

• Clear the DTC for the start stop unit using the M-MDS.

  (See CLEARING DTC [START STOP UNIT].)

• With the programmed remote transmitter in the vehicle, switch the ignition ON (engine off).

• Perform the following work 5 times or more.

• Depress the clutch pedal and release it. (MT)

• Operate the selector lever to other than P and N position from P or N position and hold for 1 s or more. (AT)

• Retrieve the start stop unit DTCs using the M-MDS.

  (See DTC INSPECTION [START STOP UNIT].)

• Is the same DTC displayed?

Yes

Replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to Step 4.

3

• Clear the DTC for the start stop unit using the M-MDS.

  (See CLEARING DTC [START STOP UNIT].)

• With the programmed remote transmitter in the vehicle, switch the ignition ON (engine off).

• Perform the following work 5 times or more.

• Depress the clutch pedal and release it. (MT)

• Operate the selector lever to other than P and N position from P or N position and hold for 1 s or more. (AT)

• Retrieve the start stop unit DTCs using the M-MDS.

  (See DTC INSPECTION [START STOP UNIT].)

• Is the same DTC displayed?

Yes

Replace the start stop unit, then go to the next step.

(See START STOP UNIT REMOVAL/INSTALLATION.)

No

Go to the next step.

4

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [START STOP UNIT].)

No

DTC troubleshooting completed.