Dtc U0073: Control Module Communication Bus Off; Dtc U0100: Lost Communication With Ecm; Dtc U0121: Lost Communication With Abs / Esp® Control Module; Dtc U0155: Lost Communication With Instrument Panel Cluster (Ipc) Control Module - Suzuki SX4 Service Manual

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3B-27 Differential:

DTC U0073: Control Module Communication Bus Off

Refer to "Troubleshooting for CAN-DTC in Section 1A".

DTC U0100: Lost Communication with ECM

Refer to "Troubleshooting for CAN-DTC in Section 1A".
DTC U0121: Lost Communication with ABS / ESP® Control Module
Refer to "Troubleshooting for CAN-DTC in Section 1A".

DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module

Refer to "Troubleshooting for CAN-DTC in Section 1A".

Inspection of 4WD Control Module and Its Circuits

4WD control module and its circuits can be checked at coupler connected to 4WD control module by measuring
voltage, pulse signal.
CAUTION
!
4WD control module cannot be checked by itself. It is strictly prohibited to connect voltmeter or
ohmmeter to 4WD control module with couplers disconnected from it.
Voltage and Signal Check
1) Check voltage using voltmeter (1) connected to each terminal of couplers.
2) Check signal using oscilloscope (2) connected to each terminal of couplers.
NOTE
• As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when
ignition switch is turned ON.
• Pulse signal cannot be measured by voltmeter. It can be measured by oscilloscope.
• Item with asterisk (*) in normal voltage column can be read only by oscilloscope.
1
S7RW0A3204021
S7RW0A3204022
S7RW0A3204023
S7RW0A3204024
S7RW0A3204025
2
I4JA01332053-01

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