Advertisement
10B-24 Body Electrical Control System:
Troubleshooting
Step
1
Check DTC in BCM
Is DTC U1001 (No. 1001) and DTC U1073 (No. 1073)
detected together?
2
Check each control module connectors
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck BCM for DTC.
Is DTC U1001 (No. 1001) detected?
3
CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules
communicating by means of CAN.
3) Check CAN communication circuit between control
modules for open, short and high resistance.
Is each CAN communication circuit in good condition?
4
Check DTC in ECM
1) Connect connectors to all control modules.
2) Check ECM for DTC.
Is DTC P1676 detected?
5
Check DTC in TCM
1) Check TCM for DTC.
Is DTC P1777 detected?
6
Check combination meter for operation
1) Start engine.
2) Check for operation of tachometer and A/T shift position
indicator in combination meter.
Are they in good condition?
Action
Yes
Go to "DTC U1073 (No.
1073): Control Module
Communication Bus
Off: ".
Go to Step 3.
Go to Step 4.
Go to "DTC P1676:
CAN Communication
(Reception Error for
TCM): in Section 1A".
Go to "DTC P1777:
TCM Lost
Communication with
ECM (Reception Error):
in Section 5A".
Substitute a known-
good BCM (included in
junction block
assembly) and recheck.
No
Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection: in Section
00".
Repair circuit.
Go to Step 5.
Go to Step 6.
Substitute a known-
good combination meter
and recheck.
Advertisement
