2019 BMW 128i Convertible (E88) L6-3.0L (N51) A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts Page 44
Fault description
DISA (Differentiated Intake Manifold) Control Circuit
Signal High
Condition for fault identification
Test condition:
Monitoring of DISA controller 2 actuator
Engine speed > 500 rpm
Terminal condition: Terminal 15, engine on
Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry
none
Action in service
1 Check wiring
Repair if defective
If wiring is OK proceed
to check component
Fault effect and breakdown warning
Driver information
Warning light:
none
Service instruction
none
(DME) Condition For Fault Memory Entry - 1
2AB2 - P0604
Information saved in
DME
Fault code
2AB2 - P0604
Fault text
DME, internal fault: RAM
Fault description
Internal Control Module Random Access Memory (RAM)
Error
Condition for fault identification
Test condition:
RAM checksum test
This test is executed once, while the control module is
booting.
Terminal condition: Immediately after wakeup in dormant
control module
Voltage condition:
none
Condition for fault memory entry
No debounce. Fault can be reset by clearing fault memory.
Action in service
Determine whether fault is stored again after carrying out
the following procedure. If yes: Replace DME.
1. Clear fault memory
2. Ignition off, allow vehicle to assume complete dormant
status
3. Ignition on
4. Read out stored fault codes from fault memory
