DTC C1783: Speed Signal Communication Error [08/2019 - ]: Procedure
- CHECK FOR DTC (AIR SUSPENSION SYSTEM)
- Clear the DTC (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
- Perform a road test.
- Check if DTC C1783 and U0122 are output (Refer to DTC CHECK / CLEAR [08/2019 - ]
).RESULT
Result Proceed to DTC is not output A DTC is output B
Result:
B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)
(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] )
Result:
A
See step 2
- CHECK FOR DTC (BRAKE CONTROL SYSTEM)
- Check if DTC C1783 and a brake control system speed sensor malfunction DTC (C0200/31, C0205/32, C0210/33 or C0215/35) are output (Refer to DTC CHECK / CLEAR [08/2019 - ]
).RESULT
Result Proceed to DTC is not output A DTC is output B
Result:
B
GO TO BRAKE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)
(Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2019 - ] )
Result:
A
See step 3
- Check if DTC C1783 and a brake control system speed sensor malfunction DTC (C0200/31, C0205/32, C0210/33 or C0215/35) are output (Refer to DTC CHECK / CLEAR [08/2019 - ]
).
- READ VALUE USING TECHSTREAM (WHEEL SPEED)
- Turn the engine switch off.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG), and turn the Techstream main switch on.
- Enter the following menus: Chassis / Air suspension / Data List.AIR SUSPENSION
Tester Display Measurement Item/Range Normal Condition Diagnostic Note FR Wheel Speed Wheel speed (Front right) reading / min.: 0 km/h (0 mph), max.: 255 km/h (159 mph) Actual vehicle speed Speed indicated on the speedometer FL Wheel Speed Wheel speed (Front left) reading / min.: 0 km/h (0 mph), max.: 255 km/h (159 mph) Actual vehicle speed Speed indicated on the speedometer RR Wheel Speed Wheel speed (Rear right) reading / min.: 0 km/h (0 mph), max.: 255 km/h (159 mph) Actual vehicle speed Speed indicated on the speedometer RL Wheel Speed Wheel speed (Rear left) reading / min.: 0 km/h (0 mph), max.: 255 km/h (159 mph) Actual vehicle speed Speed indicated on the speedometer OK
Vehicle speed indicated on the Techstream indicates the actual speed.
Result:
OK
REPLACE SUSPENSION CONTROL ECU
(Refer to REMOVAL [08/2015 - ] )
Result:
NG
GO TO BRAKE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)
(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - ] )