Circuit Description
The global positioning system (GPS) antenna is connected to the navigation radio by a coaxial cable.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2462 Global Positioning System (GPS) Signal Error
Conditions for Running the DTC
The radio must detect one of the following power modes:
| • | ACC |
| • | ON |
| • | RAP |
| • | RAP UNLK |
DTC B2462 does not set if DTC B1328 or B1327 is current.
Conditions for Setting the DTC
| • | The navigation radio test the GPS antenna every 0.3 seconds. |
| • | The radio determines there is an open in the GPS antenna. |
| • | DTC B2462 does not set if DTC B1328 or B1327 is current. |
Action Taken When the DTC Sets
| • | Unable to get GPS location updated, the radio uses the last reported position and the vehicle speed signal to calculate the vehicle position. |
| • | Route guidance may be inaccurate. |
| • | This failure has no effect outside the navigation system. |
Conditions for Clearing the DTC
| • | A current DTC clears when the radio does not detect the failure for more than 10 seconds. |
| • | A history DTC clears after 50 ignition cycles with no repeat of the failure. |
Diagnostic Aids
An intermittent condition may be caused by the following:
| • | Mis-routed harness |
| • | Rubbed through wire insulation |
| • | Broken wire inside the insulation |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Determines if the malfunction is present.
-
Determines if the malfunction is due to an internal fault in the navigation radio or a GPS antenna failure.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Radio/Navigation System Schematics | ||||
Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | ||
2 |
Is the voltage within the specified range? | 4.0-5.5 V | Go to Step 5 | Go to Step 3 |
Test the GPS cable for an open or short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 7 | Go to Step 4 | |
4 | Inspect for poor connections at the harness connector of the GPS cable. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 7 | Go to Step 6 |
5 | Replace the GPS antenna. Refer to Cellular and Navigation Antenna Assembly Replacement . Did you complete the replacement? | -- | Go to Step 7 | -- |
6 | Replace the navigation radio. Refer to Radio Replacement . Did you complete the replacement? | -- | Go to Step 7 | -- |
7 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
