DESCRIPTION
The grille shutter ECU and hybrid vehicle control ECU assembly send and receive signals via CAN communication.
If a communication error occurs between the grille shutter ECU and hybrid vehicle control ECU assembly, the ECM stores this DTC.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
---|---|---|---|---|---|---|
U129387 | Lost Communication between Hybrid Powertrain Control Module and Active Grille Air Shutter Missing Message | All of the following conditions are met and the ECM receives a malfunction signal 17 times* (1 trip detection logic):
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| Comes on | DTC stored | SAE Code: U1293 |
HINT:
*: For every 65 ms that the ECM receives a grille shutter system malfunction signal from the grille shutter ECU the ECM determines it has received the signal 1 time. If the ECM determines the malfunction signal has been received 17 consecutive times (the signal is received for approximately 1 second continuously), it will store a DTC.
MONITOR STRATEGY
Related DTCs | U1293: Lost communication with hybrid control module |
Required Sensors/Components (Main) | Swing grille actuator assembly |
Required Sensors/Components (Related) | - |
Frequency of Operation | Continuous |
Duration | 17 times |
MIL Operation | Immediate |
Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
Monitor runs whenever the following DTCs are not stored | None |
Both of the following conditions are met | - |
Auxiliary battery Voltage | 9.5 V or higher |
Power switch | On (IG) |
TYPICAL MALFUNCTION THRESHOLDS
Communication signal | Lost communication with hybrid control module |
CONFIRMATION DRIVING PATTERN
HINT:
Click here
Click here
HINT:
Techstream Display | Description |
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NORMAL |
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ABNORMAL |
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INCOMPLETE |
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HINT:
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
CAUTION / NOTICE / HINT
NOTICE:
Click here
(Select Powertrain in Health Check and then check the time stamp data.)
Click here
Click here
HINT:
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
1. | GO TO CAN COMMUNICATION SYSTEM |
(a) Refer to the CAN Communication System.
Click here
NEXT | END |