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Home >> Toyota >> 2021 >> C-HR LE >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (W/ Canister Pump) - Diagnostic Codes (P2237-U0155) & System Tests >> SFI SYSTEM (w/ Canister Pump Module) >> DTC U011B: Lost Communication with Rocker Arm Control Module "A" [05/2018 - ] >> Typical Enabling Conditions
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Typical Enabling Conditions

Monitor runs whenever the following DTCs are not stored None
All of the following conditions are met -
Battery voltage 10.5 V or higher
Ignition switch ON
Command to rocker arm control module power ON
Rocker arm control module power supply line low voltage fail (P104A) (Pending + MIL) Not detected
Starter OFF