Toyota Corolla Cross: Engine Stop and Start ECU Communication Stop Mode
DESCRIPTION
|
Detection Item |
Symptom |
Trouble Area |
|---|---|---|
|
Engine Stop and Start ECU Communication Stop Mode |
Communication stop for "Stop and Go/Start" is indicated on the "Communication Bus Check" screen of the GTS. Click here |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
- Because the order of diagnosis is important to allow correct diagnosis,
make sure to begin troubleshooting using How to Proceed with Troubleshooting
when CAN communication system related DTCs are output.
Click here
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- Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
- After the ignition switch is turned off, there may be a waiting time before
disconnecting the negative (-) auxiliary battery terminal.
Click here
- When disconnecting and reconnecting the auxiliary battery.
HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
Click here
- Some parts must be initialized and set when replacing or removing and installing
parts.
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- After performing repairs, perform the DTC check procedure and confirm that
the DTCs are not output again.
DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
- After the repair, perform the CAN bus check and check that all the ECUs
and sensors connected to the CAN communication system are displayed as normal.
Click here
- Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
- Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
- When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
|
1. |
CHECK FOR OPEN IN CAN BUS LINES (ENGINE STOP AND START ECU BRANCH LINE) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the engine stop and start ECU connector.
|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG | .gif) |
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (ENGINE STOP AND START ECU) |
|
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|
2. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
(a) Disconnect the engine stop and start ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*a |
Front view of wire harness connector (to Engine Stop and Start ECU) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A168-8 (GND1) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
Below 1 Ω |
|
A168-2 (GND2) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
Below 1 Ω |
|
A169-6 (DGND) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
Below 1 Ω |
(c) Reconnect the cable to the negative (-) auxiliary battery terminal.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A168-3 (BIN1) - Body ground |
Always |
9.5 to 14 V |
|
A168-1 (BIN2) - Body ground |
Always |
9.5 to 14 V |
|
A169-1 (+B) - Body ground |
Ignition switch ON |
9.5 to 14 V |
|
I230-21 (IGR) - Body ground |
Ignition switch ON |
9.5 to 14 V |
|
I230-18 (IGP) - Body ground |
Ignition switch ON |
9.5 to 14 V |
|
I230-19 (ACC) - Body ground |
Ignition switch ACC |
9.5 to 14 V |
| OK | |
REPLACE ENGINE STOP AND START ECU |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
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SEE MORE:
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Microphone
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"SOS" button
Services
Subscribers have the following
Safety Connect services available:
Automatic Collision Notification*
Helps drivers receive necessary
response from emergency service
providers.
*: U.S. Patent No. 7,508,298 B2
Stolen Vehicle Location
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The cause of this malfunction may be one of the following: Inverter voltage sensor (VL) internal
