Circuit Description
The GPS antenna is connected to the navigation radio by a coaxial cable.
DTC Descriptor
The diagnostic procedure supports the following DTCs:
DTC B 2462 Global Positioning System (GPS) Error
The vehicle has DTCs including the DTC symptoms. Refer to DTC Symptom Description for DTC information.
DTC Symptom | DTC Symptom Description |
|---|---|
02 | Short to ground |
04 | Open circuit |
Conditions for Running the DTC
The radio must detect one of the following power modes:
| • | ACC |
| • | ON |
| • | RAP |
| • | RAPUNLK |
| If DTC B 1328 or B 1327 is current, DTC B 2462 does not set. |
Conditions for Setting the DTC
| • | The navigation radio tests the GPS antenna every 10 seconds. |
| • | The radio determines there is an open in the GPS antenna. |
| • | If DTC B 1328 or B 1327 is current, DTC B 2462 does not set. |
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. |
| • | The malfunction does not affect other systems except navigation system. |
Conditions for Clearing the DTC
| • | A current DTC clears when the radio does not detect the failure for more than 10 seconds. |
| • | The history DTC clears after 50 malfunction-free ignition cycles. |
Diagnostic Aids
The following conditions may cause an intermittent malfunction:
| • | Wiring Fault |
| • | Wire insulation which is rubbed through |
| • | Wiring broken inside the insulation |
Test Description
The following numbers are corresponding to the steps in the diagnostic table.
-
Inspect if a malfunction exists.
-
Determines if the malfunction is due to an internal fault in the navigation radio or a GPS antenna failure.
Step | Operation | Value | Yes | No |
|---|---|---|---|---|
Schematic Reference: Radio/Navigation System Schematics | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go To Step 2 | |
2 |
Is the voltage measured within the specified value? | 4.0-5.5V | Go to Step 5 | Go To Step 3 |
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. Refer to Testing for Intermittent Conditions and Poor Connections . Did you find and correct the condition? | -- | Go To Step 7 | Go To Step 6 |
5 | Replace the GPS antenna. Refer to Electronic Navigation Antenna Replacement . Is the replacement complete? | -- | Go To Step 7 | -- |
6 | Replace the navigation radio. Refer to Control Module References for replacement, set, and programming. Is the replacement complete? | -- | Go To Step 7 | -- |
7 |
Does the DTC set again? | -- | Go To Step 2 | System is OK |
