Description

Position memory control module power supply voltage low input

Detection condition

• Position memory control module detects the following conditions:

• Position memory control module power supply circuit (terminal 1M) voltage of 9 V or less is detected.

• Position memory control module power supply circuit (terminal 1G) voltage of 6.5 V or more, 9 V or less is detected for 10 s or more.

Fail-safe function

Not applicable

Possible cause

• DTCs are stored in the PCM.

• Battery malfunction

• Generator malfunction

• Position memory control module connector or terminal malfunction

• Position memory control module power supply circuit malfunction

• Short to ground in the wiring harness between the following:

• METER1 10 A fuse—Position memory control module terminal 1G

• MAIN 200 A fuse—Position memory control module terminal 1M

• METER1 10 A fuse malfunction

• MAIN 200 A fuse malfunction

• ROOM 15 A fuse malfunction

• Open circuit in wiring harness between the following:

• IG1 relay—Position memory control module terminal 1G

• Battery positive terminal—Position memory control module terminal 1M

• Front seat malfunction

• Position memory control module malfunction

Step

Inspection

Action

1

• Retrieve the PCM DTCs using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5].)

• Are any DTCs displayed?

Yes

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

(See DTC TABLE [SKYACTIV-G 2.5].)

No

Go to the next step.

2

• Inspect the battery.

  (See BATTERY INSPECTION [SKYACTIV-G 2.5].)

• Is the battery normal?

Yes

Go to the next step.

No

Recharge or replace the battery, then go to Step 6.

(See BATTERY RECHARGING [SKYACTIV-G 2.5].)

(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

3

• Inspect the generator.

  (See GENERATOR INSPECTION [i-ELOOP].)

  (See GENERATOR INSPECTION [SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].)

• Is the generator normal?

Yes

Go to the next step.

No

Replace the generator, then go to Step 6.

(See GENERATOR REMOVAL/INSTALLATION [i-ELOOP].)

(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].)

4

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Disconnect the position memory control module 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 6.

5

• Verify that the position memory control module connector is disconnected.

• Reconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

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

• Measure the voltage at the following terminals (wiring harness-side):

• Position memory control module terminal 1G

• Position memory control module terminal 1M

• Is the voltage B+?

Yes

Go to the next step.

No

Inspect the METER1 10 A fuse, MAIN 200 A fuse and ROOM 15 A fuse.

• If the fuse is burnt out:

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

• METER1 10 A fuse—Position memory control module terminal 1G

• MAIN 200 A fuse—Position memory control module terminal 1M

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 a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

• Replace the fuse.

• If the fuse is damaged:

• Replace the fuse.

• If the fuse is normal:

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

• IG1 relay—Position memory control module terminal 1G

• Battery positive terminal—Position memory control module terminal 1M

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 the next step.

6

• Always reconnect all disconnected connectors.

• Reconnect the disconnected negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Clear the DTC for the position memory control module using the M-MDS.

  (See CLEARING DTC [POSITION MEMORY SYSTEM].)

• Retrieve the position memory control module DTCs using the M-MDS.

  (See DTC INSPECTION [POSITION MEMORY SYSTEM].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the front seat.

  (See FRONT SEAT REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

7

• Are any other DTCs displayed?

Yes

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

(See DTC TABLE [POSITION MEMORY SYSTEM].)

No

DTC troubleshooting completed.