Dtc U0073: Control Module Communication Bus Off; Dtc U0100: Lost Communication With Ecm - Suzuki 2006 SX4 Service Manual

DTC Troubleshooting
Step
1 Was "A/T System Check" performed?
2 Check TCC solenoid valve resistance
1) Turn ignition switch to OFF position.
2) Disconnect valve body harness connector (1) on
transaxle.
3) Check for proper connection to "WHT/BLU" terminal of
valve body harness connector.
4) Check resistance of TCC solenoid valve.
Resistance between terminal (2) of valve body
harness connector and vehicle body ground (3)
11 – 15 Ω (at 20 °C (68 °F))
1
Is check result satisfactory?
3 Check TCC solenoid circuit for ground short
1) Disconnect TCM connectors.
2) Check for proper connection to "C06-5" terminal of TCM
connector.
3) If connection is OK, check continuity between "C06-5"
terminal of disconnected harness side TCM connector
and ground.
Is continuity indicated?

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".
Action
2
3
Automatic Transmission/Transaxle:
Yes
Go to Step 2.
Go to Step 3.
I4RH01510248-01
"WHT/BLU" circuit
shorted to ground.
5A-59
No
Go to "A/T System
Check".
Replace TCC solenoid
valve or lead wire.
Intermittent trouble or
faulty TCM. Check for
intermittent referring to
"Intermittent and Poor
Connection Inspection
in Section 00". If OK,
substitute a known-
good TCM and recheck.
S6RW0C5104037
S6RW0C5104038