DTC P0564
Diagnostic Instructions
DTC Descriptor
| DTC P0564 00: Cruise Control Multifunction
Switch Circuit Malfunction |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
B+
|
1
|
P0564 00, 1
|
-
|
P0564 00
|
Cruise Control ON/OFF Switch Signal
|
1
|
P0564 00, 1
|
-
|
P0564 00
|
Cruise Control Resume/Acceleration Switch Signal
|
1
|
1
|
-
|
-
|
Cruise Control Set/Coast Switch Signal
|
1
|
1
|
-
|
-
|
1. Cruise Control Malfunction
|
|
| |
Circuit/System Description
The cruise control switch is an input to the body control module
(BCM). The BCM monitors the cruise control on/off, set/coast, and
the resume/accelerate switch signal circuits in order to detect
when a cruise control function switch has been activated. The BCM
detects a predetermined voltage signal when a cruise control
function switch is applied, with each switch having a different
voltage value.
Conditions for Running the DTC
| • |
The cruise switch is
ON. |
Conditions for Setting the DTC
| • |
The ECM detects an invalid
voltage signal on the cruise control switch signal circuit.
|
| • |
The above condition is present
for greater than 2 s. |
| • |
The ECM runs this diagnostic
every 0.05 s. |
Action Taken When the DTC Sets
| • |
DTC P0564 00 is a type C
DTC |
| • |
The malfunction indicator lamp
(MIL) will not illuminate. |
| • |
The cruise control system is
disabled. |
Conditions for Clearing the DTC
| • |
The condition responsible for
setting the DTC no longer exists. |
| • |
A history DTC will clear after
40 malfunction-free ignition cycles have occurred. |
Reference Information
Schematic Reference
Cruise Control Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Cruise Control Description and Operation
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Ignition ON, observe the DTC
information with a scan tool. DTC B3794 should not be set.
|
| 2. |
While rotating the steering
wheel to both steering stops, observe the scan tool Cruise Control
Switch parameter while pressing each of the cruise control
switches. The parameter should toggle between On, Off, Resume and
Set as the applicable switch is pressed. |
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
harness connector at the S70L Steering Wheel Controls Switch -
Left. |
| 2. |
Ignition ON, test for B+
between the S70L Steering Wheel Controls Switch - Left terminal 1
and ground. |
| ⇒ |
If less than the specified range, test the S70L
Steering Wheel Controls Switch - Left circuit terminal 1 circuit
for a short to ground or an open/high resistance. If the circuit
tests normal, replace the K9 Body Control Module. |
| 3. |
Test for B+ between the S70L
Steering Wheel Controls Switch - Left voltage reference circuit
terminal 1 and the signal circuit terminal 3. |
| ⇒ |
If less than the specified value, test the signal
circuit for a short to voltage or an open/high resistance. If the
circuit tests normal, replace the K9 Body Control Module. |
| 4. |
Ignition OFF, disconnect the
X3 harness connector at the K9 Body Control Module. |
| 5. |
Test for infinite resistance
between the signal circuit terminal 9 and ground. |
| ⇒ |
If less than the specified value, test the signal
circuit for a short to ground. |
| 6. |
If all circuits test normal,
test or replace the S70L Steering Wheel Controls Switch -
Left. |
Component Testing
Static Test
| 1. |
Ignition OFF, disconnect the
harness connector at the S70L Steering Wheel Controls Switch -
Left. |
| 2. |
Cruise control switch ON, test
for the following resistance values between the S70L Steering Wheel
Controls Switch - Left terminal 1 and terminal 3 while activating
the following cruise control button functions: |
| |
• |
Cruise control switch OFF,
resistance should be infinite. |
| |
• |
No cruise control button
pressed (switch at rest), resistance should be approximately
6.5-7.1k Ω. |
| |
• |
Cruise Set/Acceleration button
(I), resistance should be approximately 2.2-2.4k Ω.
|
| |
• |
Cruise Resume/Coast button
(R), resistance should be approximately 3.7-3.9k Ω.
|
| |
• |
Cruise Cancel button (0),
resistance should be approximately 1.4-1.6k Ω. |
| ⇒ |
If any of the resistance values are not within the specified
range, replace the S70L Steering Wheel Controls Switch - Left. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
