DTC P1321 / P1322
Precautions: Precautions for Diagnosing Trouble · Precautions for Servicing ENG A-STOP System · Precautions for Replacing ENG A-STOP Control Module · Precautions for Control Systems · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P1321: ENG A-STOP Battery Current Sensor “A” Circuit Low Measured voltage of electric load current sensor circuit is lower than 0.2 V for specified time continuously. |
•Electric load current sensor & battery temperature sensor circuit / connector
•Electric load current sensor & battery temperature sensor •ENG A-STOP control module |
|
P1322: ENG A-STOP Battery Current Sensor “A” Circuit High Measured voltage of electric load current sensor circuit is higher than 4.8 V for specified time continuously. |
Circuit Diagram
| [A]: | ENG A-STOP control module connector (View: [a]) | A3: | Battery temperature sensor signal circuit | 2. | ENG A-STOP control module |
| A1: | Electric load current sensor power supply circuit | A4: | Electric load current sensor & battery temperature sensor ground circuit | 3. | Electric load current sensor |
| A2: | Electric load current sensor signal circuit | 1. | Electric load current sensor & battery temperature sensor | 4. | Battery temperature sensor |
DTC Confirmation Procedure
1)Set ignition “ON”.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Electric load current sensor power supply circuit check
1)Check that ignition is “OFF”.
2)Disconnect electric load current sensor & battery temperature sensor connector.
3)Check for proper terminal connection to electric load current sensor & battery temperature sensor connector.
4)If connections are OK, set ignition “ON”.
5)Check that voltage between “A1” and “A4” is approx. 5 V.
Is check result OK?
|
Go to Step 4.
|
Go to Step 2.
|
| 2 |
Electric load current sensor ground circuit check
1)Check that voltage between “A1” and ground is approx. 5 V.
Is check result OK?
|
Repair “A4” circuit. If DTC P1321 or P1322 is still detected, replace ENG A-STOP control module and recheck for DTC.
|
Go to Step 3.
|
| 3 |
Electric load current sensor power supply circuit check
1)Set ignition “OFF”.
2)Disconnect “E24” connector.
3)Check for proper terminal connection to “E24” connector.
4)If connections are OK, check the following points.
•Resistance of “A1” circuit: less than 1 Ω
•Resistance between “A1” circuit and ground: infinity •Resistance between “A1” circuit terminal and other terminal at electric load current sensor & battery temperature sensor connector: infinity •Voltage of “A1” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Replace ENG A-STOP control module and recheck for DTC.
|
Repair or replace defective wire harness.
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| 4 |
Electric load current sensor signal circuit check
1)Set ignition “OFF”.
2)Disconnect “E24” connector.
3)Check for proper terminal connection to “E24” connector.
4)If connections are OK, check the following points.
•Resistance of “A2” circuit: less than 1 Ω
•Resistance between “A2” circuit and ground: infinity •Resistance between “A2” circuit terminal and other terminal at electric load current sensor & battery temperature sensor connector: infinity •Voltage of “A2” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 5.
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Repair or replace defective wire harness.
|
| 5 |
Electric load current sensor check
1)Check electric load current sensor & battery temperature sensor.
Is check result OK?
|
Replace ENG A-STOP control module and recheck for DTC.
|
Replace electric load current sensor & battery temperature sensor.
|