Description

Transmission range switch circuit malfunction

Detection condition

• The start stop unit detected the following condition 5 times continuously with the ignition switched ON (engine off or on).

• Transmission range switch is stuck off for a continuous 1 s or more even though the TCM CAN signal is in a position the P or N position.

Fail-safe

• Perform control of the internal signal for control of the transmission range switch as position other than P, N positions.

Possible cause

• DTCs are stored in the TCM.

• Transmission range switch connector or terminal malfunction

• Open circuit in wiring harness between transmission range switch terminal A and body ground

• PCM connector or terminal malfunction

• Start stop unit connector or terminal malfunction

• Open circuit in wiring harness between the following terminals:

• PCM terminal 2BD—Transmission range switch terminal I

• Start stop unit terminal 1F—Transmission range switch terminal I

• Transmission range switch malfunction

• PCM malfunction

• Start stop unit malfunction

Step

Inspection

Action

1

• Retrieve the TCM DTCs using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Are any DTCs displayed?

Yes

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

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)

No

Go to the next step.

2

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the transmission range switch connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 9.

3

• Verify that the transmission range switch connector is disconnected.

• Inspect for continuity between transmission range switch terminal A (wiring harness-side) and body ground.

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between transmission range switch terminal A and body ground.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step 9.

4

• Disconnect the PCM connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 9.

5

• Disconnect the start stop unit connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 9.

6

• Verify that the start stop unit, PCM and transmission range switch connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side):

• PCM terminal 2BD—Transmission range switch terminal I

• Start stop unit terminal 1F—Transmission range switch terminal I

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• PCM terminal 2BD—Transmission range switch terminal I

• Start stop unit terminal 1F—Transmission range switch terminal I

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step 9.

7

• Inspect the transmission range switch.

  (See TRANSMISSION RANGE (TR) SWITCH INSPECTION [SJ6A-EL].)

• Is the transmission range switch normal?

Yes

Go to the next step.

No

Replace the transmission range switch, then go to Step 9.

(See TRANSMISSION RANGE (TR) SWITCH REMOVAL/INSTALLATION [SJ6A-EL].)

8

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

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

  (See CLEARING DTC [START STOP UNIT].)

• Switch the ignition ON (engine off).

• Perform the following work 5 times or more.

• Operate the selector lever to P or N position and wait for 1 s or more.

• Operate the selector lever to other than P and N position and wait for 1 s or more.

• Operate the selector lever to P or N position.

• 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 10.

9

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

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

  (See CLEARING DTC [START STOP UNIT].)

• Switch the ignition ON (engine off).

• Perform the following work 5 times or more.

• Operate the selector lever to P or N position and wait for 1 s or more.

• Operate the selector lever to other than P and N position and wait for 1 s or more.

• Operate the selector lever to P or N position.

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

  (See DTC INSPECTION [START STOP UNIT].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the start stop unit.

  (See START STOP UNIT REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

10

• 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.