DESCRIPTION
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
RECONFIRM DTC
REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL ECU - ECM)
RECONFIRM DTC
DTC C1437 Lost Communication with ECM
DESCRIPTION
The skid control ECU (master cylinder solenoid) receives signals from the ECM via the CAN communication system.
| DTC Code | DTC Detection Condition | Trouble Area |
| C1437 | When the IG1 terminal voltage is 10 V or higher and the vehicle speed is 15 km/h (9 mph) or more, data cannot be sent from the ECM for 2 seconds or more. | Engine control system
CAN communication system
Skid control ECU (Master cylinder solenoid)
|
INSPECTION PROCEDURE
- When replacing the master cylinder solenoid, perform calibration ().
| 1.CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION) |
Using the GTS, check for any momentary interruption in the wire harness and connector corresponding to the DTC ().
ABS/VSC/TRC| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
| EFI Communication Open | EFI communication open circuit detection/ Error or Normal | Normal | - |
- OK:
- Normal (there are no momentary interruptions).
- Perform the above inspection before removing the sensor and connector.
Turn the ignition switch off.
Drive the vehicle at a speed of 15 km/h (9 mph) or more for 10 seconds or more.
Check that no CAN communication system DTC is output ().
Check if the same DTC is output ().
Result| Result | Proceed to |
| DTC C1437 is not output | A |
| DTC C1437 is output | B |
| CAN communication system DTC is output | C |
- Refer to the Engine Control System (How to Proceed with Troubleshooting) procedures:
for 1VD-FTV, w/o DPF ()
for 1VD-FTV, w/ DPF ()
for 1UR-FE ()
for 3UR-FE ()
- Refer to the CAN Communication System (How to Proceed with Troubleshooting) procedures:
| | GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
|
| | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
|
| A | |
| |
| CHECK FOR INTERMITTENT PROBLEMS ()
|
|
| 3.REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL ECU - ECM) |
Turn the ignition switch off.
Repair or replace the harness or connector.
Check for any momentary interruption between the skid control ECU (master cylinder solenoid) and ECM ().
Check that there is no momentary interruption.
Turn the ignition switch off.
Drive the vehicle at a speed of 15 km/h (9 mph) or more for 10 seconds or more.
Check that no CAN communication system DTC is output ().
Check if the same DTC is output ().
Result| Result | Proceed to |
| DTC C1437 is not output | A |
| DTC C1437 is output (for LHD) | B |
| DTC C1437 is output (for RHD) | C |
| CAN communication system DTC is output (for LHD) | D |
| CAN communication system DTC is output (for RHD) | E |
| | REPLACE MASTER CYLINDER SOLENOID ()
|
|
|
| | REPLACE MASTER CYLINDER SOLENOID ()
|
|
|
| | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
|
|
|
| | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
|
|
|