Pinpoint Test O: The Position Cursor Is Inaccurate
Information and Entertainment System
Pinpoint Tests
Pinpoint Test O: The Position Cursor Is Inaccurate
Normal Operation
The primary source of vehicle location for the navigation system is the Audio Control Module (ACM) receiving the position signal through the Global Positioning System (GPS) antenna.
In addition, the ACM receives the navigation rolling wheel count signal from the Instrument Cluster (IC) (which gateways the signal from the ABS module). This secondary signal is used to calculate vehicle position when the GPS signal is lost. It also supports the adaptive learning function of the ACM, whereby the ACM can compensate for long-term differences between the GPS signal location and the actual distance traveled by the vehicle.
If DTC B119F:01 or B119F:13 is present, Go To Pinpoint Test N to diagnose a concern with the GPS antenna. Pinpoint Test N: No Global Positioning System (GPS) Antenna Signal
- DTC U0155:00 (Lost Communication With Instrument Panel Cluster (IPC) Control Module) - sets when the ACM is missing the navigation rolling wheel count message from the IC for greater than 5 seconds. An error message should be displayed on the navigation screen if this signal is missing.
This pinpoint test is intended to diagnose the following:
- GPS antenna concern
- Communication network concern
- ACM
PINPOINT TEST O: THE POSITION CURSOR IS INACCURATE
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O1 CHECK THE ACM FOR GPS-RELATED DTCs
- Retrieve the ACM continuous DTCs.
- Is DTC B119F:01 or DTC B119F:13 present?
Yes
GO to O2.
No
Go To Pinpoint Test N. Pinpoint Test N: No Global Positioning System (GPS) Antenna Signal
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O2 CHECK THE ACM FOR IC-RELATED DTCs
- Clear the ACM continuous DTCs.
- Ignition OFF.
- Ignition ON.
- Wait at least 10 seconds.
- Retrieve the ACM continuous DTCs.
- Is DTC U0155:00 present?
Yes
GO to O3.
No
The system is operating correctly at this time.
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O3 CHECK FOR SCAN TOOL COMMUNICATION WITH THE IC
- Carry out the network test using the scan tool.
- Does the scan tool communicate with the IC?
Yes
GO to O4.
No
REFER to Information Bus.
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O4 CHECK THE IC AND ABS MODULE DTCs
- Carry out the self-test for the IC and the ABS module.
- Are any DTCs recorded?
Yes
REFER to Instrument Panel, Gauges and Warning Indicators (IC) or Antilock Brakes / Traction Control Systems (ABS module) to continue diagnosis. Testing and Inspection
No
GO to O5.
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O5 CHECK FOR CORRECT ACM OPERATION
- Disconnect all the ACM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the ACM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new ACM. REFER to Audio Control Module (ACM) Audio Control Module (ACM). TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR any DTCs present. REPEAT the self-test.
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