DESCRIPTION
The engine control unit communicates with the TCM using the Controller Area Network (CAN).
If there is a problem in this communication, the TCM sets a DTC.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
U0100 |
Following conditions are met for 1.25 seconds (1 trip detection logic):
|
|
MONITOR STRATEGY
Related DTCs |
U0100: Verify communication |
Required Sensors/Components (Main) |
TCM |
Required Sensors/Components (Related) |
- |
Frequency of Operation |
Continuous |
Duration |
1.25 seconds |
MIL Operation |
Immediate |
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
Monitor runs whenever following DTCs not present |
None |
Battery Voltage |
10.5 V or more |
Ignition Switch |
ON |
Starter |
OFF |
TYPICAL MALFUNCTION THRESHOLDS
Communication between TCM and ECM |
No communication |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Perform the universal trip to clear permanent DTCs (See page ).
HINT:
PROCEDURE
1. |
CHECK ECU TERMINAL VOLTAGE (+B AND E1 TERMINALS) |
(a) Disconnect the TCM connector. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
B40-18 (+B) - B40-8 (E1) |
Ignition switch ON |
9 to 14 V |
(d) Turn the ignition switch off.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
B40-8 (E1) - Body ground |
Always |
Below 1 Ω |
*1 |
Front view of wire harness connector (to TCM) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. |
CHECK HARNESS AND CONNECTOR (TCM - ECM) |
(a) Disconnect the TCM connector. |
|
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
B40-6 (CAN+) - B39-24 (CAN+) |
Always |
Below 1 Ω |
B40-7 (CAN-) - B39-1 (CAN-) |
Always |
Below 1 Ω |
B40-6 (CAN+) or B39-24 (CAN+) - Body ground or other terminals |
Always |
1 MΩ or higher |
B40-7 (CAN-) or B39-1 (CAN-) - Body ground or other terminals |
Always |
1 MΩ or higher |
*1 |
Front view of wire harness connector (to ECM) |
*2 |
Front view of wire harness connector (to TCM) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK IF DTC OUTPUT RECURS |
(a) Connect the Techstream to the DLC3.
(b) Clear the DTCs.
(c) Replace the TCM.
HINT:
Replace the TCM with a TCM from a normally functioning vehicle of the same model.
(d) Start the engine.
(e) Read the DTCs.
Display (DTC Output) |
Proceed to |
---|---|
U0100 |
A |
No DTC |
B |
A |
REPLACE ECM |
B |
REPLACE TCM |
A/C ECU Vehicle Information Reading/Writing Processor Malfunction (B15F5)
DESCRIPTION
This DTC is stored when items controlled by the air conditioning amplifier assembly
cannot be customized via the audio and visual system vehicle customization screen.
HINT:
The air conditioning amplifier assembly controls the air conditioning ...
Removal
REMOVAL
PROCEDURE
1. DRAIN DIFFERENTIAL OIL
(a) Using a 10 mm hexagon wrench, remove the rear differential carrier
cover plug and gasket.
(b) Using a 10 mm hexagon wrench, remove the ...
Driver Side Door ECU Communication Stop (B2321)
DESCRIPTION
This DTC is stored when LIN communication between the power window regulator
motor assembly (for driver side) and main body ECU (driver side junction block assembly)
stops for more than 10 seconds.
DTC No.
DTC Detection ...