Pinpoint Test H: The Audio Output Does Not Reduce When The Parking Aid Tone Sounds
Parking Aid
Pinpoint Tests
Pinpoint Test H: The Audio Output Does Not Reduce When The Parking Aid Tone Sounds
Normal Operation
With the ignition switch in the RUN position and the gear selector in REVERSE (R), the parking aid system calculates the distance to an object by the use of a radar sensor. A variable rate warning tone is generated by the parking aid sounder. A volume cutback request message is sent to the Audio Control Module (ACM) from the Parking Aid Module (PAM) over the Medium Speed Controller Area Network (MS-CAN) to decrease the volume of the audio system so that the parking aid sounder may be clearly heard.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- PAM
- ACM
PINPOINT TEST H: THE AUDIO OUTPUT DOES NOT REDUCE WHEN THE PARKING AID TONE SOUNDS
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H1 VERIFY THE PAM COMMUNICATES WITH THE INSTRUMENT CLUSTER (IC) MESSAGE CENTER DISPLAY
- Apply the parking brake.
- Ignition ON.
- Apply the brake pedal and place the gear selector in REVERSE (R).
- Disable/enable the parking aid system by pressing the reset button on the message center switch.
- Can the PAM be disabled/enabled in the IC message center display?
Yes
GO to H2.
No
GO to H3.
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H2 CHECK THE SCAN TOOL COMMUNICATION
- Carry out the network test using the scan tool.
- Does the ACM pass the network test?
Yes
GO to H3.
No
REFER to Information Bus to diagnose network communication.
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H3 CHECK FOR CORRECT PAM OPERATION
- Disconnect the PAM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the PAM 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 PAM. REFER to Parking Aid Module (PAM) Service and Repair. 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.
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