DTC P0564

Cruise control switch circuit malfunction

DETECTION CONDITION

• The PCM monitors the cruise control switch signal at PCM terminal 1AQ. If the PCM detects that any one of following switches (ON OFF, SET/-, SET/COAST, RES/+) remains on for 2 min, the PCM determines that the cruise control switch circuit has a malfunction.

Diagnostic support note

• This is a continuous monitor (Other).

• The MIL does not comes on.

• PENDING CODE is available if the PCM detects the above malfunction condition.

• FREEZE FRAME DATA is available.

• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• Cruise control switch malfunction

• Connector or terminal malfunction

• Short to power circuit in wiring from cruise control switch terminal B and PCM terminal 1AQ

• Short to ground circuit in wiring from cruise control switch terminal B and PCM terminal 1AQ

• PCM malfunction

STEP

INSPECTION

ACTION

1

• Verify related Service Bulletins and/or on-line repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

No

Go to the next step.

2

• Turn the ignition switch off.

• Inspect for poor connection (such as damaged, pulled-out terminals, corrosion).

• Is there any malfunction?

Yes

Repair or replace the terminal, then go to Step 6.

No

Go to the next step.

3

• Disconnect cruise control switch and PCM connectors.

• Inspect for continuity between cruise control switch terminal B (wiring harness-side) and body ground.

• Is there continuity?

Yes

Repair or replace short to ground, then go to Step 6.

No

Go to the next step.

4

• Turn the ignition switch to the ON position (Engine off).

• Inspect the voltage between cruise control switch terminal B (wiring harness-side) and body ground.

• Is the voltage below 1.0 V?

Yes

Go to the next step.

No

Repair or replace short to power supply, then go to Step 6.

5

• Inspect the cruise control switch.

  (See CRUISE CONTROL SWITCH INSPECTION [LF].)

• Is the cruise control switch normal?

Yes

Go to the next step.

No

Replace the cruise control switch, then go to the next step.

6

• Make sure to reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

• Drive the vehicle with cruise control 2 min. or more.

• Is the same DTC present?

Yes

Replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [LF].)

No

Go to the next step.

7

• Perform “AFTER REPAIR PROCEDURE”.

  (See AFTER REPAIR PROCEDURE [LF].)

• Is there any DTC present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [LF].)

No

Troubleshooting completed.