Toyota CH-R Service Manual: Lost Communication with Gateway Module (U1002)

NOTICE:

• Inspect the fuses for circuits related to this system before performing the following inspection procedure.
• Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
• After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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• If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition axis adjustment.

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• When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.

HINT:

• Operating the ignition switch, any other switches or a door triggers related ECUs and sensors to communicate using the CAN communication system. This communication will cause the resistance value to change.
• Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the connectors of ECUs or wire harnesses while performing the inspection below may help determine the cause of the malfunction.

Lost Communication with Cruise Control Front Distance Range Sensor (U0235)

Lost Communication with ECM / PCM "A" (U0100,U0125,U0126,U0129,U023A)

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