Pinpoint Test C: The Audio Input Jack Is Inoperative/Does Not Operate Correctly
Information and Entertainment System
Pinpoint Test C: The Audio Input Jack Is Inoperative/Does Not Operate Correctly
Refer to Wiring Diagrams Set 130, Audio System for schematic and connector information. Electrical Diagrams
Normal Operation - Vehicles Without SYNC(R) (Late Build) or Without Bluetooth Hands-Free System (Early Build)
Audio signals are sent from the audio input jack to the ACM (Audio Front Control Module). There are no external power or ground circuits to the audio input jack.
Vehicles With SYNC(R) (Late Build) or With Bluetooth Hands-Free System (Early Build)
Audio signals are sent from the audio input jack to the APIM (Accessory Protocol Interface Module) (with SYNC(R)) or the SRM (Speech Recognition Module) (with Bluetooth Hands-Free System), and then to the ACM (Audio Front Control Module). There are no external power or ground circuits to the audio input jack.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Audio input jack
- ACM (Audio Front Control Module) (without SYNC(R) or without Bluetooth Hands-Free System)
- APIM (Accessory Protocol Interface Module) (with SYNC(R))
- SRM (Speech Recognition Module) (with Bluetooth Hands-Free System)
PINPOINT TEST C : THE AUDIO INPUT JACK IS INOPERATIVE/DOES NOT OPERATE CORRECTLY
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Before carrying out this pinpoint test, make sure the MP3 device is operating correctly.
C1 CHECK THE AUDIO INPUT JACK AUDIO
- Connect: Multi-Media Interface Tester (105-00120).
- Using the Multi-Media Interface Tester (105-00120), attempt to play an audio file using the audio input jack.
Does the file play correctly?
Yes
The system is operating correctly at this time. The concern is with the customer device.
No
For late build vehicles with SYNC(R), GO to C2.
For late build vehicles without SYNC(R), GO to C6.
For early build vehicles with the Bluetooth Hands-Free System, GO to C3.
For early build vehicles without the Bluetooth Hands-Free System, GO to C8.
C2 VERIFY THE OPERATION OF THE SYNC(R) SYSTEM AUDIO SOURCES
- Connect: Multi-Media Interface Tester (105-00120).
- Using the Multi-Media Interface Tester (105-00120), test the audio output for the audio input jack, USB (Universal Serial Bus) port, and Bluetooth connection.
Is only the audio input jack inoperative?
Yes
GO to C6.
No
GO to Pinpoint Test R to diagnose the audio signal from the APIM (Accessory Protocol Interface Module) to the ACM (Audio Front Control Module). Pinpoint Test R: Poor Quality/Distorted/No Sound While In SYNC(R) Mode (Late Build)
C3 CHECK THE SRM (Speech Recognition Module) AUDIO OUTPUT
- Ignition OFF.
- Disconnect: ACM (Audio Front Control Module) C240C.
- Operate the audio system in AUX mode.
- Using the Multi-Media Interface Tester (105-00120), attempt to play an audio file using the audio input jack.
- With the audio file still playing, measure the AC voltage between the ACM (Audio Front Control Module) C240C-5, circuit 8-MD27 (WH/VT), harness side and the ACM (Audio Front Control Module) C240C-11, circuit 10-MD27 (GY/WH), harness side.
Is a fluctuating AC voltage present?
Yes
GO to C11.
No
GO to C4.
C4 CHECK THE SRM (Speech Recognition Module) AUDIO OUTPUT CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: SRM (Speech Recognition Module) C2307.
- Ignition ON.
- Measure the voltage between the SRM (Speech Recognition Module) C2307-5, circuit 8-MD27 (WH/VT), harness side and ground; and between the SRM (Speech Recognition Module) C2307-6, circuit 10-MD27 (GY/WH), harness side and ground.
Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to C5.
C5 CHECK THE SRM (Speech Recognition Module) AUDIO OUTPUT CIRCUITS FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the SRM (Speech Recognition Module), harness side and the ACM (Audio Front Control Module), harness side; and between the SRM (Speech Recognition Module), harness side and ground.
Positive Meter Lead Negative Meter Lead Circuit C2307-6 C240C-11, then ground 10-MD27 (GY-WH) C2307-23 C240C-6, then ground 3-MD27 (BK) C2307-5 C240C-5, then ground 8-MD27 (WH-VT)
Are the resistances less than 3 ohms between the SRM (Speech Recognition Module) and the ACM (Audio Front Control Module), and greater than 10,000 ohms between the SRM (Speech Recognition Module) and ground?
Yes
GO to C8.
No
REPAIR the circuit in question. TEST the system for normal operation.
C6 CHECK THE AUDIO INPUT JACK CIRCUITS FOR A SHORT TO VOLTAGE (LATE BUILD)
- Ignition OFF.
- Disconnect: Audio Input Jack C2401.
- Disconnect: ACM (Audio Front Control Module) C290A (base), ACM (Audio Front Control Module) C290B (premium), or APIM (Accessory Protocol Interface Module) C2383 (SYNC(R)).
- Ignition ON.
- Measure the voltage between the audio input jack, harness side and ground.
Positive Meter Lead Negative Meter Lead C2401-1 10-MD27 (BN-RD) Ground C2401-2 9-MD27 (BU/RD) Ground C2401-3 91-MD27 (YE/RD) Ground C2401-4 8-MD27 (GY/RD) Ground
Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to C7.
C7 CHECK THE AUDIO INPUT JACK CIRCUITS FOR AN OPEN OR SHORT TO GROUND (LATE BUILD)
- Ignition OFF.
- Measure the resistance between the audio input jack, harness side and the ACM (Audio Front Control Module), harness side; and between the audio input jack, harness side and ground as follows:
Option Content Positive Meter Lead Negative Meter Lead Circuit Base C2401-1 C290A-16, then ground 10-MD27 (BN-RD) C2401-2 C290A-17, then ground 9-MD27 (BU/RD) C2401-3 C290A-19, then ground 91-MD27 (YE/RD) C2401-4 C290A-18, then ground 8-MD27 (GY/RD)
- Measure the resistance between the audio input jack, harness side and the ACM (Audio Front Control Module), harness side; and between the audio input jack, harness side and ground as follows:
Option Content Positive Meter Lead Negative Meter Lead Circuit Premium C2401-1 C290B-6, then ground 10-MD27 (BN-RD) C2401-2 C290B-14, then ground 9-MD27 (BU/RD) C2401-3 C290B-8, then ground 91-MD27 (YE/RD) C2401-4 C290B-7, then ground 8-MD27 (GY/RD)
- Measure the resistance between the audio input jack, harness side and the APIM (Accessory Protocol Interface Module), harness side; and between the audio input jack, harness side and ground as follows:
Option Content Positive Meter Lead Negative Meter Lead Circuit SYNC(R)C2401-1 C2383-47, then ground 10-MD27 (BN/RD) C2401-2 C2383-48, then ground 9-MD27 (BU/RD) C2401-3 C2383-46, then ground 91-MD27 (YE/RD) C2401-4 C2383-45, then ground 8-MD27 (GY/RD)
Are the resistances less than 3 ohms between the audio input jack and the ACM (Audio Front Control Module) (base or premium) or APIM (Accessory Protocol Interface Module) (SYNC(R)), and greater than 10,000 ohms between the audio input jack and ground?
Yes
GO to C10.
No
REPAIR the circuit in question. TEST the system for normal operation.
C8 CHECK THE AUDIO INPUT JACK CIRCUITS FOR A SHORT TO VOLTAGE (EARLY BUILD)
- Ignition OFF.
- Disconnect: Audio Input Jack C2401.
- Disconnect: ACM (Audio Front Control Module) C240C (without Bluetooth Hands-Free System) or SRM (Speech Recognition Module) C2307 (with Bluetooth Hands-Free System).
- Ignition ON.
- Measure the voltage between the audio input jack, harness side and ground.
Positive Meter Lead Negative Meter Lead C2401-1 10-MD27 (GY/WH) Ground C2401-4 8-MD27 (WH/VT) Ground
Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to C9.
C9 CHECK THE AUDIO INPUT JACK CIRCUITS FOR AN OPEN OR SHORT TO GROUND (EARLY BUILD)
- Ignition OFF.
- Measure the resistance between the audio input jack, harness side and the ACM (Audio Front Control Module) (without Bluetooth Hands-Free System) or SRM (Speech Recognition Module) (with Bluetooth Hands-Free System), harness side; and between the audio input jack, harness side and ground as follows:
Option Content Positive Meter Lead Negative Meter Lead Circuit Without Bluetooth Hands-Free System C2401-1 C240C-11, then ground 10-MD27 (GY/WH) C2401-4 C240C-5, then ground 8-MD27 (WH/VT)
Option Content Positive Meter Lead Negative Meter Lead Circuit With Bluetooth Hands-Free System C2401-1 C2307-38, then ground 10-MD27 (GY/WH) C2401-4 C2307-37, then ground 8-MD27 (WH/VT)
Are the resistances less than 3 ohms between the audio input jack and the ACM (Audio Front Control Module) (Without Bluetooth Hands-Free System) or APIM (Accessory Protocol Interface Module) (With Bluetooth Hands-Free System), and greater than 10,000 ohms between the audio input jack and ground?
Yes
GO to C10.
No
REPAIR the circuit in question. TEST the system for normal operation.
C10 ISOLATE THE AUDIO INPUT JACK
- Connect: All Disconnected Connectors.
- Install a new audio input jack. Refer to Audio Input Jack .
- Connect: Multi-Media Interface Tester (105-00120).
- Using the Multi-Media Interface Tester (105-00120), attempt to play an audio file using the audio input jack.
Does the file play correctly?
Yes
The concern was caused by an inoperative audio input jack. The system is now operating correctly.
No
For vehicles without SYNC(R) or without the Bluetooth Hands-Free System, GO to C11.
For vehicles with the Bluetooth Hands-Free System, GO to C12.
For vehicles with SYNC(R), GO to C13.
C11 CHECK FOR CORRECT ACM (Audio Front Control Module) OPERATION
- Ignition OFF.
- Connect: All Disconnected Connectors.
- Disconnect all the ACM (Audio Front Control Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the ACM (Audio Front Control Module) connectors and make sure they seat correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes
INSTALL a new ACM (Audio Front Control Module). REFER to 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.
C12 CHECK FOR CORRECT SRM (Speech Recognition Module) OPERATION
- Ignition OFF.
- Connect: All Disconnected Connectors.
- Disconnect the SRM (Speech Recognition Module) connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the SRM (Speech Recognition Module) connector and make sure it seats correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes
INSTALL a new SRM (Speech Recognition Module). REFER to Speech Recognition Module (SRM) . 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.
C13 CHECK FOR CORRECT APIM (Accessory Protocol Interface Module) OPERATION
- Ignition OFF.
- Connect: All Disconnected Connectors.
- Disconnect the APIM (Accessory Protocol Interface Module) connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the APIM (Accessory Protocol Interface Module) connector and make sure it seats correctly.
- Wait 2 minutes for the APIM (Accessory Protocol Interface Module) to re-initialize.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes
INSTALL a new APIM (Accessory Protocol Interface Module). REFER to Accessory Protocol Interface Module (APIM) . 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.