Toyota Corolla Cross: Lost Communication with ECM/PCM "A" Missing Message (U010087,U010187,U012687,U012987,U014087,U015187,U015587,U016487,U115C87,U117087)
DESCRIPTION
The engine stop and start ECU communicates with the SFI system, electronically controlled brake system, power steering system, air conditioning system, airbag system and main body ECU (multiplex network body ECU) via CAN communication.
If there is a communication error between the engine stop and start ECU and any of the systems, the engine stop and start ECU stores DTCs.
HINT:
- When there is an open in the output side of the backup boost converter (built into the engine stop and start ECU), power to the system with the open is cut off. The engine stop and start ECU stores CAN communication DTCs for the system with the open and stop and start system DTC P323A16.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | Warning Indicate |
Note |
|---|---|---|---|---|---|---|
| U010087 |
Lost Communication with ECM/PCM "A" Missing Message |
No communication between the engine stop and start ECU and ECM for 1 second. |
| Comes on (For Mexico Models: Does not come on) |
Does not come on (For Mexico Models: Blinks) |
SAE Code: U0100 |
|
U010187 | Lost Communication with TCM Missing Message |
No communication between the engine stop and start ECU and TCM for 1 second. |
| Comes on (For Mexico Models: Does not come on) |
Does not come on (For Mexico Models: Blinks) |
SAE Code: U0101 |
|
U012687 | Lost Communication with Steering Angle Sensor Module Missing Message |
No communication between the engine stop and start ECU and steering sensor for 1 second. |
| Does not come on |
Does not come on | SAE Code: U0126 |
|
U012987 | Lost Communication with Brake System Control Module Missing Message |
No communication between the engine stop and start ECU and skid control ECU (brake actuator assembly) for 2.22 seconds. |
| Comes on (For Mexico Models: Does not come on) |
Does not come on (For Mexico Models: Blinks) |
SAE Code: U0129 |
|
U014087 | Lost Communication with Body Control Module Missing Message |
No communication between the engine stop and start ECU and the main body ECU (multiplex network body ECU) for 3.6 seconds. |
| Does not come on |
Does not come on (For Mexico Models: Blinks) |
SAE Code: U0140 |
|
U015187 | Lost Communication with Restraints Control Module Missing Message |
No communication between the engine stop and start ECU and airbag ECU assembly for 10.6 seconds. |
| Does not come on |
Does not come on (For Mexico Models: Blinks) |
SAE Code: U0151 |
|
U015587 | Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message |
No communication between the engine stop and start ECU and the combination meter assembly for 4 second |
| Does not come on |
Blinks | SAE Code: U0155 |
|
U016487 | Lost Communication with HVAC Control Module Missing Message |
No communication between the engine stop and start ECU and air conditioning amplifier assembly for 10.6 seconds. |
| Does not come on |
Does not come on (For Mexico Models: Blinks) |
SAE Code: U0164 |
|
U115C87 | Lost Communication with ECM/PCM "A" (ch5) Missing Message |
No communication between the engine stop and start ECU and ECM for 10.6 seconds. |
| Comes on |
Does not come on | SAE Code: U115C |
|
U117087 | Lost Communication With Brake System Control Module(ch2) Missing Message |
No communication between the engine stop and start ECU and the skid control ECU (brake actuator assembly) for 3 second |
| Does not come on |
Blinks | SAE Code: U1170 |
MONITOR STRATEGY
|
Related DTCs | U0100: Lost communication with engine control module (starter / generator control module) verify communication U0101: Lost communication with transmission control module (starter / generator control module) verify communication U0129: Lost communication with brake system control module (starter / generator control module) verify communication U115C: Lost communication with engine control module (starter / generator control module, chassis local bus) verify communication |
|
Required Sensors/Components (Main) |
Engine stop and start ECU |
|
Required Sensors/Components (Related) |
- |
| Frequency of Operation |
Continuous |
| Frequency of Operation |
1 seconds: U0100 1 seconds: U0101 2.22 seconds: U0129 10.6 seconds: U115C |
|
Duration | 2 driving cycles: U0100, U0101, U0129 Immediate: U115C |
|
Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs whenever the following DTCs are not stored |
None |
| Ignition switch |
ON |
| Time after ignition switch is off to ON |
3 seconds or more |
|
Battery voltage | 10 V or higher |
|
Write Inhibit | permit |
|
Time after Write status forbiddance to permit |
0.5 seconds or more |
|
Starter | Off |
|
Time after starter on to off |
0.5 seconds or more |
TYPICAL MALFUNCTION THRESHOLDS
U0100, U115C|
Communication signal | Lost communication with engine control module |
|
Communication signal | Lost communication with transmission control module |
|
Communication signal | Lost communication with brake system control module |
CONFIRMATION DRIVING PATTERN
CONFIRMATION AFTER TROUBLESHOOTING
HINT:
- If the cable is disconnected from the auxiliary battery terminal, stop and start control is prohibited until refresh charge is completed.
In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item "Status of Battery Charge Control" changes from "Refresh Charge Mode". (Usually, by idling the engine for 5 to 60 minutes with the auxiliary battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)
- If the GTS is not available and the Data List item "Status of Battery Charge Control" cannot be checked, charge the auxiliary battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.
If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.
- After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.
- Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.
- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure (except Mexico Models).
Click here
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- When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories (except Mexico Models).
(a) Clear the DTCs.
Powertrain > Stop and Start > Clear DTCs(b) Turn the ignition switch off and wait for at least 30 seconds.
(c) Turn the ignition switch to ON.
(d) Wait 15 seconds or more.
(e) Enter the following menus.
Powertrain > Stop and Start > Trouble Codes(f) Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
STOP AND START SYSTEM OPERATION CHECK
Click here
CAUTION / NOTICE / HINT
HINT:
If any of CAN communication system DTCs and sensor malfunction DTCs related to the CAN communication system are output simultaneously, perform troubleshooting for the CAN communication system DTCs first, then for the sensor malfunction DTCs.
PROCEDURE
| 1. |
CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Stop and Start > Clear DTCs
|
.gif)
| 2. |
CHECK DTC OUTPUT |
(a) Turn the ignition switch off and wait for 30 seconds or more.
(b) Start the engine.
(c) Perform a road test.
(d) Read the DTCs.
Powertrain > Stop and Start > Trouble Codes|
Result | Proceed to |
|---|---|
|
DTC U010087, U010187, U012687, U012987, U014087, U015187, U015587, U016487, U115C87 or U111087 is output |
A |
| DTC U010087, U010187, U012687, U012987, U014087, U015187, U015587, U016487, U115C87 or U111087 is not output |
B |
| A |
.gif) | GO TO CAN COMMUNICATION SYSTEM |
| B |
| USE SIMULATION METHOD TO CHECK |
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