Diagnosis system (driver seat C/U)
U1000 CAN comm circuitB2193 chain of ECM-IMMU
Description
BCM performs the ID verification with ECM that allows the
engine to start. Start the engine if the ID is OK.
ECM prevents the engine from starting if the ID is not registered. BCM starts
the communication with ECM if
ignition switch is turned ON.
DTC Logic
DTC DETECTION LOGIC ...
ECM branch line circuit
Diagnosis Procedure
1.CHECK CONNECTOR
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Check the following terminals and connectors for damage, bend and
loose connection (unit side and connector
side).
- Models without automatic drive position ...
Diagnosis and repair workflow
Work Flow
OVERALL SEQUENCE
DETAILED FLOW
1.CHECK SYMPTOM
Check the malfunction symptoms by performing the following items.
Interview the customer to obtain the malfunction information (conditions
and environment when the malfunction
occurred).
Check the symptom.
2.SELF-DIAGNOS ...