DTC P0564 [L8, LF]

DTC P0564	Cruise control switch circuit malfunction
DETECTION CONDITION	• The PCM monitors the cruise control switch signal. If the PCM detects that any one of following switches (ON OFF, CANCEL, SET/-, 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 illuminate. • FREEZE FRAME DATA (Mode 2/Mode 12) is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Clock spring connector or terminals (PCM-side/cruise control switch-side) malfunction • Clock spring malfunction • Short to ground in wiring harness clock spring connector (PCM-side) terminal B and PCM terminal 1AQ • PCM connector or terminals malfunction • Short to power supply in wiring harness clock spring connector (PCM-side) terminal B and PCM terminal 1AQ • Cruise control switch malfunction • PCM malfunction

DTC P0564

Cruise control switch circuit malfunction

DETECTION CONDITION

• The PCM monitors the cruise control switch signal. If the PCM detects that any one of following switches (ON OFF, CANCEL, SET/-, 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 illuminate.

• FREEZE FRAME DATA (Mode 2/Mode 12) is available.

• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• Clock spring connector or terminals (PCM-side/cruise control switch-side) malfunction

• Clock spring malfunction

• Short to ground in wiring harness clock spring connector (PCM-side) terminal B and PCM terminal 1AQ

• PCM connector or terminals malfunction

• Short to power supply in wiring harness clock spring connector (PCM-side) terminal B and PCM terminal 1AQ

• Cruise control switch malfunction

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY FREEZE FRAME DATA (MODE 12) AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED • Have the FREEZE FRAME DATA (Mode 12) and DIAGNOSTIC MONITORING TEST RESULTS (other related) been recorded?	Yes	Go to the next step.
No	Record the FREEZE FRAME DATA (Mode 12) and DIAGNOSTIC MONITORING TEST RESULTS on repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
No	Go to the next step.
3	INSPECT CLOCK SPRING CONNECTOR AND TERMINALS (PCM-SIDE/CRUISE CONTROL SWITCH-SIDE) • Turn the ignition switch off. • Disconnect the clock spring connector (PCM-side/cruise control switch-side). • Inspect for poor connection (such as damaged, pulled-out terminals, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 9.
No	Go to the next step.
4	INSPECT CLOCK SPRING • Inspect the clock spring. (See CLOCK SPRING INSPECTION.) • Is there any malfunction?	Yes	Replace the clock spring, then go to Step 9. (See CLOCK SPRING REMOVAL/INSTALLATION.)
No	Go to the next step.
5	INSPECT CRUISE CONTROL SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND • Clock spring connector is disconnected. • Inspect for continuity between clock spring connector (PCM-side) terminal B (wiring harness-side) and body ground. • Is there continuity?	Yes	If the short to ground circuit could be detected: • Repair or replace the wiring harness for a possible short to ground. If the short to ground circuit could not be detected: • Replace the PCM (short to ground in PCM internal circuit). (See PCM REMOVAL/INSTALLATION [L8, LF].) Go to Step 9.
No	Go to the next step.
6	INSPECT PCM CONNECTOR AND TERMINALS • Disconnect the PCM connector. • Inspect for poor connection (such as damaged, pulled-out terminals, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 9.
No	Go to the next step.
7	INSPECT CRUISE CONTROL SWITCH SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Clock spring and PCM connectors are disconnected. • Turn the ignition switch to the ON position (engine off). • Measure the voltage between clock spring connector (PCM-side) terminal B (wiring harness-side) and body ground. • Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 9.
No	Go to the next step.
8	INSPECT CRUISE CONTROL SWITCH OPERATION • Inspect the cruise control switch. (See CRUISE CONTROL SWITCH INSPECTION [L8, LF].) • Is there any malfunction?	Yes	Replace the cruise control switch, then go to the next step. (See AUDIO CONTROL SWITCH REMOVAL/INSTALLATION.)
No	Go to the next step.
9	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [L8, LF].) • 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 [L8, LF].)
No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L8, LF].) • Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE [L8, LF].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA (MODE 12) AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED

• Have the FREEZE FRAME DATA (Mode 12) and DIAGNOSTIC MONITORING TEST RESULTS (other related) been recorded?

Yes

Go to the next step.

Record the FREEZE FRAME DATA (Mode 12) and DIAGNOSTIC MONITORING TEST RESULTS on repair order, then go to the next step.

VERIFY RELATED SERVICE INFORMATION AVAILABILITY

• Verify related Service Information availability.

• Is any related Service Information available?

Yes

Perform repair or diagnosis according to the available Service Information.

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

Go to the next step.

INSPECT CLOCK SPRING CONNECTOR AND TERMINALS (PCM-SIDE/CRUISE CONTROL SWITCH-SIDE)

• Turn the ignition switch off.

• Disconnect the clock spring connector (PCM-side/cruise control switch-side).

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

• Is there any malfunction?

Yes

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

Go to the next step.

INSPECT CLOCK SPRING

• Inspect the clock spring.

(See CLOCK SPRING INSPECTION.)

• Is there any malfunction?

Yes

Replace the clock spring, then go to Step 9.

(See CLOCK SPRING REMOVAL/INSTALLATION.)

Go to the next step.

INSPECT CRUISE CONTROL SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND

• Clock spring connector is disconnected.

• Inspect for continuity between clock spring connector (PCM-side) terminal B (wiring harness-side) and body ground.

• Is there continuity?

Yes

If the short to ground circuit could be detected:

• Repair or replace the wiring harness for a possible short to ground.

If the short to ground circuit could not be detected:

• Replace the PCM (short to ground in PCM internal circuit).

(See PCM REMOVAL/INSTALLATION [L8, LF].)

Go to Step 9.

Go to the next step.

INSPECT PCM CONNECTOR AND TERMINALS

• Disconnect the PCM connector.

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

• Is there any malfunction?

Yes

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

Go to the next step.

INSPECT CRUISE CONTROL SWITCH SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY

• Clock spring and PCM connectors are disconnected.

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

• Measure the voltage between clock spring connector (PCM-side) terminal B (wiring harness-side) and body ground.

• Is there any voltage?

Yes

Repair or replace the wiring harness for a possible short to power supply, then go to Step 9.

Go to the next step.

INSPECT CRUISE CONTROL SWITCH OPERATION

• Inspect the cruise control switch.

(See CRUISE CONTROL SWITCH INSPECTION [L8, LF].)

• Is there any malfunction?

Yes

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

(See AUDIO CONTROL SWITCH REMOVAL/INSTALLATION.)

Go to the next step.

VERIFY DTC TROUBLESHOOTING COMPLETED

• Make sure to reconnect all disconnected connectors.

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

(See AFTER REPAIR PROCEDURE [L8, LF].)

• 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 [L8, LF].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “AFTER REPAIR PROCEDURE”.

(See AFTER REPAIR PROCEDURE [L8, LF].)

• Are any DTCs present?

Yes

Go to the applicable DTC troubleshooting.

(See DTC TABLE [L8, LF].)

DTC troubleshooting completed.