DTC 16:Er12 [MULTIPLEX COMMUNICATION SYSTEM (R.H.D.)]

id0902j4847800

DTC	16Er:12	CAN system communication error
DETECTION CONDITION		Warning •  Perform the following on-board diagnosis according to FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (R.H.D.)] troubleshooting procedure. •  CAN system-related harness malfunction •  CAN system-related module malfunction
POSSIBLE CAUSE		•  Open or short circuit in wiring harness •  Malfunction of connectors between audio unit, HF/TEL unit, and resistor •  Audio unit malfunction •  HF/TEL unit malfunction •  Resistor malfunction

Diagnostic procedure

Caution

•  When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.

Step	Inspection		Action
1	VERIFICATION BEFORE SERVICING •  Are any DTCs, except the following, displayed? ―  16:Er12	Yes	Determine the open circuit location referring to DETERMINING MALFUNCTIONING PART (MS-CAN) [MULTIPLEX COMMUNICATION SYSTEM (R.H.D.)].
		No	Go to the next step.
2	INSPECTION OF CONTROL MODULE CONNECTOR OUTPUTTING DTCs •  Inspect the terminal condition of the control module connector outputting DTCs and the mid-connector. •  Are the connector terminals normal without damage, deformation, corrosion, or disconnection?	Yes	Go to the next step.
		No	Repair or replace the connector, then go to Step 9.
3	INSPECTION OF POWER SUPPLY OF CONTROL MODULE OUTPUTTING DTCs •  Refer to the terminal voltage table of the control module outputting DTCs to inspect the terminal voltage and fuse condition. •  Is the power supply voltage normal?	Yes	Go to the next step.
		No	Repair or replace the connector, then go to Step 9.
4	INSPECTION OF BODY GROUND CONDITION OF CONTROL MODULE OUTPUTTING DTCs •  Inspect the body ground wires and ground point of the control module outputting DTCs. •  Are the ground and ground point normal?	Yes	Go to the next step.
		No	Repair or replace the connector, then go to Step 9.
5	CAN SYSTEM RELATED WIRING HARNESS INSPECTION •  CAN system related wiring harness inspection: ―  Short to ground ―  Short to power supply ―  Short between twisted pair wiring harness ―  Open circuit •  Is the wiring harness normal?	Yes	Go to the next step.
		No	Repair or replace the connector, then go to Step 9.
6	INSPECT AUDIO UNIT •  Disconnect the audio unit connector. •  Measure the resistance between the following audio unit connector terminals: ―  Between terminal 1O and terminal 1Q (part side) •  Is the resistance 118-130 ohms?	Yes	Go to the next step.
		No	Replace the audio unit, then go to Step 9. (See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)
7	INSPECT RESISTOR •  Disconnect the resistor connector. •  Measure the resistance between the following resistor connector terminals: ―  Between terminal A and terminal B (part side) •  Is the resistance 118-130 ohms?	Yes	Go to the next step.
		No	Replace the resistor, then go to Step 9.
8	CAN RELATED MODULE VERIFICATION •  Remove only one of the CAN-related modules. •  Clear DTCs. •  Inspect the DTCs of all modules. •  Are DTCs 16:Er12 displayed?	Yes	Reinstall the removed module, remove another module and perform the same inspection. Inspect all of the CAN-related modules using the same procedure. After inspecting all of the modules, go to the next step.
		No	Replace the removed module.
9	AFTER REPAIR VERIFICATION •  Connect all of the modules. •  Clear DTCs. •  Inspect the DTCs. •  Are DTCs displayed?	Yes	Perform the CAN system on-board diagnosis again according to the troubleshooting procedure (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (R.H.D.)].)
		No	DTC troubleshooting completed.