Diagnostic trouble code (DTC) information
WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
IMM-233 Antenna ring
Condition
Diagnostic trouble code (DTC) IMM-233 is stored two seconds after ignition if the immobilizer control module tries to read a transponder and does not receive a signal from the antenna ring. Faults which cause diagnostic trouble code (DTC) IMM- 233 can also cause diagnostic trouble code (DTC) IMM-225 to be stored.
The diagnostic trouble code (DTC) is erased when the counter value reaches 254.
Possible Source
- Defective antenna ring.
- Antenna ring is not connected.
- Fault in the control module antenna connector.
- The cable between control module terminal #9 and antenna ring terminal #2 is short-circuited to ground.
- Cable between control module terminal #9 and antenna ring terminal #2 is short-circuited to supply voltage.
- The cable between control module terminal #10 and antenna ring terminal #4 is short-circuited to ground.
- Cable between control module terminal #10 and antenna ring terminal #4 is short-circuited to supply voltage.
- Open-circuit in cables to or in the antenna ring.
- Short-circuit in cables to or in the antenna ring.
Fault symptom[s]
- Engine starts but stops immediately.
- In certain cases however, the engine may start.