Pinpoint Test V: The Audio Input Jack Is Inoperative/Does Not Operate Correctly
Information and Entertainment System
Pinpoint Test V: The Audio Input Jack Is Inoperative/Does Not Operate Correctly
Normal Operation
Audio signals are sent from the audio input jack to the Accessory Protocol Interface Module (APIM). The signals are then sent to the Audio Control Module (ACM). 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
- APIM (Accessory Protocol Interface Module)
PINPOINT TEST V : 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.
V1 CHECK THE AUDIO INPUT JACK AUDIO
- Using the Multi-Media Interface Tester, attempt to play a file using the audio input jack.
Does the file play correctly?
Yes
The system is operating correctly at this time. The concern may be with the customer device.
No
GO to V2.
V2 CHECK THE SYNC SYSTEM AUDIO OUTPUT
- Using the Multi-Media Interface Tester, attempt to play an audio file using either the Universal Serial Bus (USB) port or Bluetooth.
Is the audio output OK for the USB (Universal Serial Bus) port or Bluetooth?
Yes
GO to V3.
No
GO to Pinpoint Test B. Pinpoint Test B: Poor Quality/Distorted/No Sound While In SYNC Mode
V3 CHECK THE AUDIO INPUT JACK CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Audio Input Jack C3312.
- Disconnect: APIM (Accessory Protocol Interface Module) C3342.
- Ignition ON.
- Measure the voltage between the audio input jack, harness side and ground as follows:
Positive Meter Lead Negative Meter Lead Circuit C3312-1 Ground VME46 (BU/GN) C3312-2 Ground RME46 (WH/GN) C3312-3 Ground RME45 (YE/GN) C3312-4 Ground VME45 (BU)
Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to V4.
V4 CHECK THE AUDIO INPUT JACK CIRCUITS FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- 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:
Positive Meter Lead Negative Meter Lead Circuit C3312-1 C3342-47, then ground VME46 (BU/GN) C3312-2 C3342-48, then ground RME46 (WH/GN) C3312-3 C3342-46, then ground RME45 (YE/GN) C3312-4 C3342-45, then ground VME45 (BU)
Is the resistance less than 5 ohms between the audio input jack and the APIM (Accessory Protocol Interface Module), and greater than 10,000 ohms between the audio input jack and ground?
Yes
GO to V5.
No
REPAIR the circuit in question. TEST the system for normal operation.
V5 ISOLATE THE AUDIO INPUT JACK
- Connect: APIM (Accessory Protocol Interface Module) C3342.
- Install a new audio input jack. Refer to Audio Input Jack .
- Using the Multi-Media Interface Tester, attempt to play an audio file using the audio input jack.
Does the system operate correctly?
Yes
The concern was caused by an inoperative audio input jack. The system is operating correctly at this time.
No
GO to V6.
V6 CHECK FOR CORRECT APIM (Accessory Protocol Interface Module) OPERATION
- Ignition OFF.
- 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.
- 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.