Circuit Description
The Integrated Radio Controller (IRC) and the CD changer communicate on the E&C data line. The IRC sets DTC B1760 when it detects a loss of E&C communications with the CD Changer. If the CD changer is not heard from, the IRC initiates communications with the CD changer to determine its integrity.
Conditions for Setting the DTC
| • | This algorithm shall execute when the radio transitions from the OFF to the ON mode. |
| • | DTC B1760 will set if the IRC detects a loss of E&C communication between the radio and the CD changer. |
Action Taken When the DTC Sets
| • | DTC B1760 is stored in the IRC memory. |
| • | No driver warning message will be displayed for this DTC. |
Conditions for Clearing the DTC
DTC B1760 will clear when the ignition switch is cycled.
Diagnostic Aids
Refer to the diagnositc table below.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Radio/Audio System Diagnostic System Check performed? | -- | ||
Is the measured resistance within the specified value? | Less than 5 ohms | |||
3 |
Is the repair complete? | -- | -- | |
Replace the CD changer. Is the replacement complete? | -- | -- | ||
5 |
Does the radio and the CD changer communicate properly? | -- | System OK |
