DTC U0155 (No. 0155): Lost Communication with Instrument Panel Cluster (IPC) Control Module: Troubleshooting

WARNING: This page is about a different car, the 2008 Suzuki Grand Vitara and 2007 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.

TROUBLESHOOTING TABLE

Step	Action	YES	NO
1	DTC check of BCM Is DTC U0155 (No. 0155) and DTC U1073 (No. 1073) detected together?	Go to DTC U1073 (NO. 1073): CONTROL MODULE COMMUNICATION BUS OFF .	Go to Step 2.
2	Control module connector check Check connection of connectors of all control modules communicating by means of CAN. Recheck BCM for DTC. Is DTC U0155 (No. 0155) detected?	Go to Step 3.	Intermittent trouble. Check for intermittent by referring to INTERMITTENT AND POOR CONNECTION INSPECTION Intermittent and Poor Connection Inspection.
3	Combination meter power and ground circuit check Turn ignition switch to ON position. Do warning lights in combination meter other than key indicator lights light up?	Go to Step 4.	Check combination meter power and ground circuit. If circuit is OK, substitute a known-good combination meter and recheck.
4	CAN communication circuit check Turn ignition switch to OFF position. Disconnect connectors from BCM and combination meter. Check CAN communication circuit between BCM and combination meter for open, short and high resistance. Is each CAN communication circuit in good condition?	Go to Step 5.	Repair circuit.
5	CAN communication circuit check Disconnect connectors of all control modules communicating by means of CAN. Check CAN communication circuit between control modules other than Step 4 for open, short and high resistance. Is each CAN communication circuit in good condition?	Go to Step 6.	Repair circuit.
6	DTC check of BCM Connect connectors of disconnected control modules communicating by means of CAN. Disconnect connector of any one of control module other than BCM. Recheck BCM for DTC. Is DTC U0155 (No.0155) detected?	Disconnect connectors of control modules other than the one whose connector is disconnected in Step 2) one by one and check that DTC U0155 is detected by BCM each time connector is disconnected. When DTC U0155 is not detected by BCM while checking in this way, go to description under "NO" below. If DTC U0155 is detected by BCM even when connectors of all control modules that use CAN communication with BCM are disconnected, substitute a known-good BCM and recheck.	Check power and ground circuit of control module disconnected in Step 2). If circuit is OK, substitute a known-good control module disconnected in Step 2) and recheck.