DESCRIPTION
The engine control unit and transmission control unit are located inside the ECM. The engine control unit intercommunicates with the transmission control unit using CAN communication.
If there is a problem in this intercommunication, the ECM stores this DTC.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
---|---|---|---|---|---|---|
U010087 | Lost Communication with ECM/PCM "A" Missing Message | While the engine switch is on (IG), there is no communication between the engine control unit and transmission control unit for 1.25 seconds or more (1-trip detection logic). | ECM | Comes on | DTC stored | SAE Code: U0100 |
MONITOR STRATEGY
Related DTCs | U0100: Verify communication |
Required sensors/components (Main) | ECM |
Required sensors/components (Related) | - |
Frequency of Operation | Continuous |
Duration | 1.25 sec. |
MIL Operation | Immediately |
Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
The monitor will run whenever the following DTCs are not stored | None |
Battery Voltage | 10.5 V or more |
Engine switch | On (IG) |
Starter | Off |
TYPICAL MALFUNCTION THRESHOLDS
Communication signal | Lost communication with ECM/PCM |
CONFIRMATION DRIVING PATTERN
HINT:
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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 |
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ABNORMAL |
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INCOMPLETE |
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N/A |
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HINT:
CAUTION / NOTICE / HINT
NOTICE:
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Click here
PROCEDURE
1. | CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC U010087) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Transmission / Trouble Codes.
Powertrain > Transmission > Trouble Codes(e) Read the DTCs using the Techstream.
Result | Proceed to |
---|---|
Only DTC U010087 is output | A |
DTC U010087 and other DTCs are output | B |
B | GO TO DTC CHART |
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2. | REPLACE ECM |
(a) Replace the ECM.
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NEXT | PERFORM REGISTRATION |