Toyota Yaris: Active Torque Split Awd System / 4WD/AWD Front/Rear Range Actuator Control Circuit Performance Circuit Voltage Out of Range (C05F51C)
DESCRIPTION
When a malfunction has occurred in the AWD coupling solenoid system, the AWD ECU assembly stores DTC C05F51C.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Memory |
|---|---|---|---|---|---|
| C05F51C | 4WD/AWD Front/Rear Range Actuator Control Circuit Performance Circuit Voltage Out of Range |
|
| Displayed | Yes |
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | IG1 terminal voltage is 9.5 V or more and current requested by AWD linear solenoid is 0 A | ○ | - |
| IG1 terminal voltage is 9.5 V or more and current requested by AWD linear solenoid is 0.8 A | - | ○ | |
| Malfunction Status | Short circuit | ○ | - |
| Open circuit | - | ○ | |
| Detection Time | 1 second or more | 1 second or more | |
| Number of Trips | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When the AWD ECU assembly is replaced, before removing the AWD ECU assembly, it is necessary to perform ECU Data Save to save the original AWD ECU assembly information.
Click here
-
After performing repairs, clear the DTCs and check that the DTCs are not output again.
Click here
PROCEDURE
| 1. | CHECK HARNESS AND CONNECTOR (AWD ECU ASSEMBLY - AWD LINEAR SOLENOID (TRANSMISSION COUPLING ASSEMBLY)) |
(a) Turn the ignition switch off.
(b) Disconnect the O120 AWD ECU assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| O120-4 (SLC+) - O120-3 (SLC-) | 20°C (68°F) | 2.2 to 2.6 Ω |
| O120-4 (SLC+) - Body ground | Always | 10 kΩ or higher |
| NG |
 | GO TO STEP 3 |
|
| 2. | CHECK HARNESS AND CONNECTOR (AWD ECU ASSEMBLY - AWD LINEAR SOLENOID (TRANSMISSION COUPLING ASSEMBLY)) |
(a) Turn the ignition switch off.
(b) Disconnect the O120 AWD ECU assembly connector.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| O120-3 (SLC-) - Body ground | Always | Below 1 V |
| OK |
 | REPLACE AWD ECU ASSEMBLY |
|
| 3. | CHECK HARNESS AND CONNECTOR (AWD ECU ASSEMBLY - AWD LINEAR SOLENOID (TRANSMISSION COUPLING ASSEMBLY)) |
(a) Turn the ignition switch off.
(b) Disconnect the O119 and O120 AWD ECU assembly connector.
(c) Disconnect the U3 AWD linear solenoid (transmission coupling assembly) connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| O120-4 (SLC+) - U3-1 (BSF) | Always | Below 1 Ω |
| O120-3 (SLC-) - U3-2 (SLC) | Always | Below 1 Ω |
| O119-1 (GND) - Body ground | Always | Below 1 Ω |
| O120-4 (SLC+) or U3-1 (BSF) - Body ground | Always | 10 kΩ or higher |
| O120-3 (SLC-) or U3-2 (SLC) - Body ground | Always | 10 kΩ or higher |
| O120-4 (SLC+) or U3-1 (BSF) - O120-3 (SLC-) or U3-2 (SLC) | Always | 10 kΩ or higher |
| O120-4 (SLC+) - O119-1 (GND) | Always | 10 kΩ or higher |
| O120-3 (SLC-) - O119-1 (GND) | Always | 10 kΩ or higher |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | CHECK HARNESS AND CONNECTOR (AWD ECU ASSEMBLY - AWD LINEAR SOLENOID (TRANSMISSION COUPLING ASSEMBLY)) |
(a) Turn the ignition switch off.
(b) Disconnect the O120 AWD ECU assembly connector.
(c) Disconnect the U3 AWD linear solenoid (transmission coupling assembly) connector.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| O120-3 (SLC-) or U3-2 (SLC) - Body ground | Always | Below 1 V |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. | INSPECT AWD LINEAR SOLENOID (TRANSMISSION COUPLING ASSEMBLY) |
(a) Turn the ignition switch off.
(b) Disconnect the U3 AWD linear solenoid (transmission coupling assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Standard Resistance | Condition | Specified Condition |
|---|---|---|
| U3-1 (BSF) - U3-2 (SLC) | 20°C (68°F) | 2.2 to 2.6 Ω |
| OK |
 | USE SIMULATION METHOD TO CHECK |
| NG |
 | REPLACE TRANSMISSION COUPLING ASSEMBLY |
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