DESCRIPTION
If a malfunction in the power source circuit occurs, or a malfunction in communication with the skid control ECU or in a speed sensor occurs, the AWD control ECU will prohibit operations by the fail-safe function.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1241/94 |
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
Check the condition of each related circuit connector before troubleshooting (See page ).
PROCEDURE
1. |
CHECK FOR DTC (CAN COMMUNICATION SYSTEM AND BRAKE CONTROL SYSTEM) |
(a) Check if the CAN communication system DTC is output (See page ).
(b) Start the engine.
(c) Drive the vehicle, accelerate to a speed of 3 km/h (2 mph) or more, and check if the speed sensor DTC (brake control system DTC) is output (See page ).
Result |
Proceed to |
---|---|
Neither CAN communication system DTC nor speed sensor DTC (brake control system DTC) is output |
A |
CAN communication system DTC is output |
B |
Speed sensor DTC (brake control system DTC) is output |
C |
B |
REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (CAN COMMUNICATION SYSTEM) |
C |
REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (BRAKE CONTROL SYSTEM) |
|
2. |
INSPECT BATTERY |
(a) Check the battery voltage.
Standard Voltage:
11 to 14 V
Result |
Proceed to |
---|---|
OK |
A |
NG (2GR-FE) |
B |
NG (1AR-FE) |
C |
B |
INSPECT CHARGING SYSTEM (2GR-FE) |
C |
INSPECT CHARGING SYSTEM (1AR-FE) |
|
3. |
CHECK WIRE HARNESS (AWD CONTROL ECU - BATTERY) |
(a) Disconnect the ECU connector.
(b) Measure the voltage of the wire harness side connector.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
D38-11 (IG1) - Body Ground |
Ignition switch ON |
11 to 14 V |
*1 |
Rear view of wire harness connector (to AWD Control ECU) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK WIRE HARNESS (AWD CONTROL ECU - BODY GROUND) |
(a) Disconnect the ECU connector.
(b) Measure the resistance of the wire harness side connector.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D38-23 (GND) - Body Ground |
Always |
Below 1 Ω |
*1 |
Rear view of wire harness connector (to AWD Control ECU) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
RECONFIRM DTC |
(a) Clear the DTC (See page ).
(b) Start the engine.
(c) Drive the vehicle, accelerate to a speed of 3 km/h (2 mph or more, and check if the same DTC is output.
Result |
Proceed to |
---|---|
DTC is output |
A |
DTC is not output |
B |
HINT:
Reinstall the sensor, connectors, etc. and restore the vehicle to its prior condition before rechecking DTCs.
A |
REPLACE AWD CONTROL ECU |
B |
CHECK INTERMITTENT PROBLEMS |
Removal
REMOVAL
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH side and LH side.
The procedure listed below is for the LH side.
PROCEDURE
1. REMOVE REAR WHEEL
2. SEPARATE REAR DISC BRAKE CALIPER ASSEMBLY
3. REMOVE REAR DISC ...
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)
(a) Disconnect the 2F and 2C driver side junction block connectors.
(b) Disconnect the D50 and D51 main body ECU connectors.
(c) Measure the resistance and voltage according to ...
How To Proceed With Troubleshooting
HOW TO PROCEED WITH TROUBLESHOOTING
1. OPERATION FLOW
HINT:
Perform troubleshooting in accordance with the procedure below. The following
is an outline of basic troubleshooting procedure. Confirm the troubleshooting procedure
for the circuit you are wor ...