DESCRIPTION
The engine control unit and the transmission control unit are located inside the ECM. The engine control unit intercommunicates with the transmission control unit with the Controller Area Network (CAN).
If there is a problem in this intercommunication, the ECM stores a DTC.
DTC Code |
DTC Detection Condition |
Trouble Area |
SAE |
---|---|---|---|
U010087 |
All conditions are met for 1.25 seconds or more (1-trip detection logic): (A) The ignition switch is ON and battery voltage is 9.5 V or higher. (B) There is no communication between the engine control unit and transmission control unit. |
ECM |
U0100 |
MONITOR STRATEGY
Related DTCs |
U0100: Verify communication |
Required Sensors/Components (Main) |
ECM |
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 stored |
None |
Battery Voltage |
9.5 V or higher |
Ignition Switch |
ON |
Starter |
OFF |
TYPICAL MALFUNCTION THRESHOLDS
Communication signal |
Lost communication with engine control unit |
CONFIRMATION DRIVING PATTERN
HINT:
HINT:
[*1] : Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Techstream Display |
Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
N/A |
|
HINT:
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK DTC OUTPUT (IN ADDITION TO DTC U010087) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Transmission / Trouble Codes.
(e) Read the DTCs using the Techstream.
Result
Result |
Proceed to |
---|---|
Only U010087 is output |
A |
U010087 and other DTCs are output |
B |
A | ![]() |
REPLACE ECM |
B | ![]() |
GO TO DTC CHART |
Security Indicator Light Does not Blink
DESCRIPTION
The transponder key ECU assembly blinks the security indicator light
when the immobiliser is set (no key is in the ignition key cylinder).
w/ Theft Deterrent System:
The main body ECU (multiplex network body ECU) blinks the security indicator
light when the thef ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
When removing any parts, turn the ignition switch off.
HINT:
If no abnormality is found when inspecting parts, check the skid control
ECU and check for poor contact at ground points.
When 2 or more DTCs are detected, perform each circuit insp ...
Installation
INSTALLATION
CAUTION / NOTICE / HINT
CAUTION:
Be sure to perform this procedure with several people as the transfer assembly
is very heavy.
PROCEDURE
1. INSTALL TRANSFER CASE LOWER PROTECTOR
(a) Install the transfer case lower protector with the 4 bolts.
Torque:
18 N·m {184 kgf·cm, 13 f ...