Loss of Communication DTC cross-reference chart

When an ECU is unable to communicate with the other ECUs on the CAN circuit, the other control units will set loss of communication DTCs. Use this chart to find the control unit that is not communicating.

1. Find the Transmitting Control Unit that is in the same row as all of the loss of communication DTCs retrieved.
2. Perform the input test for the transmitting control unit.
   BUS OFF AND INTERNAL ERROR CODES
   
   

   DTC Type	Related Unit
   	MICU	Relay Control Module	Door Multiplex Control Unit	Combination Switch Control Unit	Gauge Control Module	HVAC Control Unit or Climate Control Unit
   BUS OFF	B1000	B1050	B1100	B1250	B1150	B1200
   ECU (CPU) Error	B1001
   ECU (EEPROM) Error	B1002		B1102		B1152	B1202

   DTC CROSS-REFERENCE CHART
   
   

   Transmitting Control Unit	Message	Receiving Unit/Loss of Communication DTC
   		MICU	Relay Control Module	Door Multiplex Control Unit	Combination Switch Control Unit	Gauge Control Module	HVAC Control Unit or Climate Control Unit
   MICU	ALARM		B1056
   	MICU		B1055	B1106	B1255	B1157
   	DOOR SWITCH		B1057	B1105		B1159
   Relay Control Module	RELAY CONTROL MODULE	B1005				B1158
   Door Multiplex Control Unit	PANIC	B1010	B1059
   	DRIVER'S DOOR LOCK SWITCH	B1006	B1058			B1160
   Combination Switch Control Unit	HEADLIGHT SWITCH	B1007	B1062			B1155
   	WIPER SWITCH		B1063			B1156
   Gauge Control Module	VSP/NE	B1011	B1060				B1205
   	A/T	B1008	B1061
   	ENGTEP						B1206
   PCM	ENG					B1168
   		AT	B1169
   TPMS Control Unit	TPMS					B1173
   VSA Modulator-control Unit	VSA					B1170