Check CAN Bus Lines for Short Circuit [08/2013 - ]: Description

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

There may be a short circuit between the V bus main lines and/or CAN branch lines when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.

Symptom	Trouble Area
Resistance between terminals 6 (CANH) and 14 (CANL) of DLC3 is below 54 Ω.	Short in CAN main bus line Short in CAN branch line Power management control ECU ECM Main body ECU (Multiplex network body ECU) Combination meter assembly Brake booster with master cylinder assembly (Skid control ECU) Steering sensor Power steering ECU with motor assembly Airbag sensor assembly Air conditioning amplifier assembly Certification ECU (Smart key ECU assembly) Multi-media module receiver assembly12 Radio receiver assembly3 Clearance warning ECU assembly4 CAN junction connector LH1 CAN junction connector RH1

Symptom

Trouble Area

Resistance between terminals 6 (CANH) and 14 (CANL) of DLC3 is below 54 Ω.

Short in CAN main bus line
Short in CAN branch line
Power management control ECU
ECM
Main body ECU (Multiplex network body ECU)
Combination meter assembly
Brake booster with master cylinder assembly (Skid control ECU)
Steering sensor
Power steering ECU with motor assembly
Airbag sensor assembly
Air conditioning amplifier assembly
Certification ECU (Smart key ECU assembly)
Multi-media module receiver assembly*1*2
Radio receiver assembly*3
Clearance warning ECU assembly*4
CAN junction connector LH1
CAN junction connector RH1

*1: w/ Navigation system
*2: w/ Audio and visual system (w/ Multi-display with parking assist monitor system)
*3: w/ Audio and visual system (w/ Multi-display without parking assist monitor system)
*4: w/ Intuitive parking assist system