Pinpoint Test M: DTC U0155:00

Active Park Assist

Pinpoint Tests

Pinpoint Test M: DTC U0155:00

Refer to Wiring Diagram Set 131 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Parking Aid for schematic and connector information. Diagrams By Number

Normal Operation
- DTC U0155:00 (Lost Communication With Instrument Cluster (IC): No Sub-Type Information) - sets in the Parking Aid Module (PAM) if data messages received from the Instrument Cluster (IC) over the High Speed Controller Area Network (HS-CAN) are missing after the active park assist system is activated. For a complete list of all network messages, refer to Information Bus.

This pinpoint test is intended to diagnose the following:

- IC
- PAM




PINPOINT TEST M: DTC U0155:00

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M1 VERIFY THE CUSTOMER CONCERN



- Ignition ON.
- Verify that there is an observable symptom present.
- Is an observable symptom present?

Yes
GO to M2.

No
The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

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M2 CHECK THE COMMUNICATION NETWORK



- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Carry out the network test.
- Does the IC pass the network test?

Yes
GO to M3.

No
REFER to Information Bus.

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M3 RECHECK THE PAM DTCs



- Clear the DTCs.
- Operate the system and test the system for normal operation.
- Repeat the PAM self-test.
- Is DTC U0155:00 still present?

Yes
GO to M4.

No
The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

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M4 CHECK FOR DTC U0155 OR DTC U0155:00 IN OTHER MODULES



- Clear all DTCs.
- Ignition OFF.
- Wait 10 seconds.
- Enter the following diagnostic mode on the scan tool: Self-Test.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC U0155 or DTC U0155:00 set in any module?

Yes
INSTALL a new IC. REFER to Instrument Panel, Gauges and Warning Indicators. TEST the system for normal operation.

No
GO to M5.

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M5 CONFIGURE THE IC



- Flash the IC with the latest scan tool software.
- Operate the system and test the system for normal operation.
- Repeat the PAM self-test.
- Is DTC U0155:00 still present?

Yes
GO to M6.

No
The system is operating correctly at this time. The IC had the incorrect software level.

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M6 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 verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new PAM. REFER to Collision Avoidance and Parking Assist Systems. 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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