Dtc P1550 Battery Current Sensor Circuit
Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT BATTERY CURRENT SENSOR ASSEMBLY
CHECK HARNESS AND CONNECTOR (BATTERY CURRENT SENSOR - ECM)
DTC P1550 Battery Current Sensor Circuit |
DTC P1551 Battery Current Sensor Circuit Low |
DTC P1552 Battery Current Sensor Circuit High |
DESCRIPTION
The battery current sensor installed on the positive (+) battery terminal detects the amount of current supplied from the generator.The battery current sensor changes current to voltage (at the positive (+) battery terminal) and sends it to the ECM. The ECM controls the voltage of the generator based on the signals from the battery current sensor.DTC No.
| DTC Detection Condition
| Trouble Area
|
P1550
| The following condition continues for 10 seconds or more with the ignition switch ON (1 trip detection logic):
- The difference between the maximum and minimum current values of the battery current sensor is 1 A or less.
| - Open or short in battery current sensor circuit
- Battery current sensor assembly
- ECM
|
P1551
| The battery current sensor output value is 0.2 V or less for 0.5 seconds or more with the ignition switch ON (1 trip detection logic).
| - Short in battery current sensor circuit
- Battery current sensor assembly
- ECM
|
P1552
| The battery current sensor output value is 4.8 V or higher for 0.5 seconds or more with the ignition switch ON (1 trip detection logic).
| - Open in battery current sensor circuit
- Battery current sensor assembly
- ECM
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. 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.
| 1.INSPECT BATTERY CURRENT SENSOR ASSEMBLY |
Disconnect the battery current sensor connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
2 (VC5) - 4 (E2)
| Always
| 0.1 to 10 kΩ
|
2 (VC5) - 3 (IB)
| Always
| Below 0.5 kΩ
|
3 (IB) - 4 (E2)
| Always
| 0.05 to 10 kΩ
|
Text in Illustration*1
| Component without harness connected
(Battery Current Sensor Assembly)
|
| 2.CHECK HARNESS AND CONNECTOR (BATTERY CURRENT SENSOR - ECM) |
Disconnect the battery current sensor connector.
Disconnect the ECM connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Open):
Tester Connection
| Condition
| Specified Condition
|
B31-3 (IB) - B32-66 (IB)
| Always
| Below 1 Ω
|
B31-2 (VC5) - B32-67 (VCPM)
| Always
| Below 1 Ω
|
B31-4 (E2) - B32-68 (EIB)
| Always
| Below 1 Ω
|
B31-1 (THB) - A12-54 (THB)
| Always
| Below 1 Ω
|
- Standard Resistance (Check for Short):
Tester Connection
| Condition
| Specified Condition
|
B31-3 (IB) or B32-66 (IB) - Body ground
| Always
| 10 kΩ or higher
|
B31-2 (VC5) or B32-67 (VCPM) - Body ground
| Always
| 10 kΩ or higher
|
B31-1 (THB) or A12-54 (THB) - Body ground
| Always
| 10 kΩ or higher
|
Text in Illustration*1
| Front view of wire harness connector
(to Battery Current Sensor Assembly)
|
*2
| Front view of wire harness connector
(to ECM)
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY CURRENT SENSOR - ECM) |
|
|
