B1856

Read the instructions below then start the fault diagnostic procedure.

Symptom: Soft top cannot be operated. SID shows message SOFT TOP FAILURE.

B1856

Fault symptom

Soft top cannot be operated. SID shows message SOFT TOP FAILURE.

Condition

Control module cannot receive a response from the relay in question.

Diagnostic procedure

There is communication on the VR-bus as long as there is +54 current. This DTC is generated if response is missing from the relay in question.

The cause of the problem could be power supply, grounding or that bus connection is missing.

-	Try replacing the fifth bow latch relay with, for example, the relay for the right front window.

-	Activate the relay with the button for the right front window on the centre console.

-	The latch motor should lock or unlock the fifth bow.

-	If the fifth bow locks or unlocks, the problem is likely in the latch relay

Checking wiring harness

Intermittent faults can exist during temporary short circuits and open circuits. Wiggle the wiring harness at several points and in different directions to discover problems in the wiring harness and connectors. Observe the multimeter, diagnostic tool or the test lamp during checking.