Audible Warning Device
U0423-IMPLAUSIBLE DATA RECEIVED FROM CLUSTER/CCNWHEN MONITORED
Park Assist Module supply voltage between 9-16 volts. Ignition in Run/Start.
SET CONDITION
Ignition status = 7h
POSSIBLE CAUSES
- No communication with instrument cluster
- DTCS stored or active in the instrument cluster
- Active DTCS in the FCM
- Park assist module
DIAGNOSTIC TEST
1. CHECK FOR ACTIVE DTC: U0423-IMPLAUSIBLE DATA RECEIVED FROM CLUSTER/CCN
Turn the ignition on.
With the scan tool, record and erase Park Assist Module DTCs.
Wait 30 seconds.
With the scan tool, read Park Assist Module DTCs.
Q: Is DTC: U0423-IMPLAUSIBLE DATA RECEIVED FROM CLUSTER/CCN active?
YES: Go To 2
NO: The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
2. INSTRUMENT CLUSTER IS ACTIVE ON THE CAN B BUS
With the scan tool, select ECU View.
Verify that the Instrument Cluster is active on the bus.
Q: Is the Instrument Cluster active on the bus?
YES: Go To 3
NO: Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
3. DTCS STORED OR ACTIVE IN THE INSTRUMENT CLUSTER
Check for Ignition Switch DTCs in the Instrument Cluster.
Q: Are any DTCs active or stored in the Instrument Cluster?
YES: Perform the diagnostics for the DTCs. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go to 4
4. ACTIVE DTCS IN THE FCM
With the scan tool, select ECU View and select FCM.
With the scan tool, read active DTCs.
Q: Are any Communication DTCs active in the FCM Park Assist System?
YES: Perform the diagnostics for the DTCs. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace and program the Park Assist Module. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test