The power back door system troubleshooting procedure is based on the premise that the smart entry and start system (for Entry Function) is operating normally. Check the power back door system first before troubleshooting the power back door system.
for HV Model:
for Gasoline Model:
Use the following procedure to troubleshoot the power back door system.
*: Use the GTS.
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In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
The following 5 items are important points for problem analysis:
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*: Interview the customer about the details of the driving conditions, environment and the malfunction, then check the DTCs after reading and storing the record of behavior. |
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| What | Vehicle model, system name |
| When | Date, time, occurrence frequency, whether the problem occurred recently or has been occurring for a long time |
| Where | Whether the problem occurs at a specific location |
| Under what conditions? | Driving conditions, weather conditions |
| How did it happen? | Problem symptoms* |
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If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before vehicle control history (RoB) has been read out and saved, the vehicle control history (RoB) information could be lost.
The function "Read vehicle control history (RoB)" uses the current system time setting inside the GTS and the time counter inside the controlling ECU to calculate the timings shown in the vehicle control history (RoB). For this reason, before reading out the vehicle control history (RoB), first make sure that the GTS system clock is accurately set to the current time.
Read and save vehicle control history (RoB) using the GTS.
| Tester Display |
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| Vehicle Control History (RoB) |
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Check the problem symptom.
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Measure the auxiliary battery voltage with the ignition switch off.
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
Check the fuses and relays.
Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.
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Use the GTS to check if the CAN communication system is functioning normally.
for SFTM Made HV Model:
for GTMC Made HV Model:
for SFTM Made Gasoline Model:
for GTMC Made Gasoline Model:
| Result | Proceed to |
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| DTC is not output | A |
| DTC is output | B |
A
B
for SFTM Made HV Model:
for GTMC Made HV Model:
for SFTM Made Gasoline Model:
for GTMC Made Gasoline Model:
Check for DTCs.
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
A
B
Using the GTS, check for Vehicle Control History (RoB).
| Tester Display |
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| Vehicle Control History (RoB) |
Make a note of the Vehicle Control History (RoB) output.
| Result | Proceed to |
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| Vehicle Control History (RoB) is not output | A |
| Vehicle Control History (RoB) is output | B |
A
B
Refer to Problem Symptoms Table.
| Result | Proceed to |
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| Fault is not listed in Problem Symptoms Table | A |
| Fault is listed in Problem Symptoms Table | B |
A
B
Data List / Active Test
Inspection
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Check whether the replacement, removal and installation of the multiplex network door ECU or disconnection of the connectors of the multiplex network door ECU, the disconnection of the cable of the negative (-) auxiliary battery terminal with the back door open, or the removal and installation or replacement of the power source system fuses has been performed.
| Result | Proceed to |
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·
The negative (-) auxiliary battery terminal has disconnected with the back door open. ·
A power source system fuse has removed and installed or replaced. ·
The multiplex network door ECU has removed and installed or replaced, or the multiplex network door ECU connector has disconnected. |
A |
·
The negative (-) auxiliary battery terminal has not disconnected with the back door open. ·
A power source system fuse has not removed and installed or replaced. ·
The multiplex network door ECU has not removed and installed or replaced, or the multiplex network door ECU connector has not disconnected. |
B |
A
B
Initialize the power back door system.
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