DIAGNOSIS AND REPAIR WORKFLOW
Interview Sheet

Precaution
System descriptionP1720 VSS
Description
ECM receives two vehicle speed signals via the CAN communication line. One is
sent from "ABS actuator and
electric unit (control unit)" via the combination meter, and the other is from
TCM (Transmission control module).
ECM uses these signals for engine control.
DTC Logic
DTC ...
Aux image signal circuit
Description
Transmits the image signal of AUX device from auxiliary input jacks to
AV control unit.
AV control unit transmits the image signal that is input to the
display unit.
Diagnosis Procedure
1.CHECK CONTINUITY AUX IMAGE SIGNAL CIRCUIT
Turn ignition switch OFF.
Disconnect ...
B2553 ignition relay
Description
BCM turns ON the following relays to ignition power supply to each ECU when
the ignition switch is turned
ON.
Ignition relay-1 (inside IPDM E/R)
Ignition relay-2 (inside fuse block (J/B))
Front blower motor relay
BCM checks any ignition relay ON request for consistency wi ...