DTC B1311-87: Clock Module - Missing message: Action

NOTE: This DTC may be stored even though no fault condition is present and should be ignored unless the customer has reported an analogue clock concern. Clear the DTC and retest. Verify the customer concern prior to diagnosis

Refer to the applicable SYSTEM WIRING DIAGRAMS to locate the fused supply circuit to the clock. With the ignition supply in the off state, remove and reinstall the fuse
Refer to the applicable SYSTEM WIRING DIAGRAMS and check the LIN circuit - Circuit reference LIN_1 - Between the clock and the central junction box. Repair circuit as required, clear DTC and retest
If fault persists, check and install a new clock as required. Clear DTC and retest