Pinpoint Test Q : U0146:00

Q1 VERIFY THE CUSTOMER CONCERN

Ignition ON.

Verify there is an observable symptom present.

Is an observable symptom present?

Yes

GO to Q2

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.

Q2 CHECK THE COMMUNICATION NETWORK
- Using a diagnostic scan tool, perform the network test.
Does the GWM pass the network test?

Yes GO to Q3

No REFER to: Communications Network .

Q3 PERFORM THE GWM (GATEWAY MODULE A) SELF-TEST
- Using a diagnostic scan tool, perform the GWM self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to: Communications Network .

No GO to Q4

Q4 RECHECK THE PARKING AID MODULE (PAM) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).

Operate the system and test for normal operation.

Check the Parking Aid Module (PAM) Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Is DTC U0146:00 still present?

Yes

GO to Q5

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.

Q5 CHECK FOR DIAGNOSTIC TROUBLE CODE (DTC) U0146:00 OR DIAGNOSTIC TROUBLE CODE (DTC) U0146:87 IN OTHER MODULES
- Using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs).
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Using a diagnostic scan tool, retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.
Is DTC U0146:00 or DTC U0146:87 set in any other module?

Yes INSTALL a new GWM. REFER to: Gateway Module A (GWM) .

No Refer to BCM Hardware Testing (Except Hybrid/Energi) .