DTC C0020:11/C0020:12/C0020:13/C0020:49/C0020:71 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2907500

DTC
C0020:11, C0020:12, C0020:13, C0020:49, C0020:71
Pump motor, motor relay
DETECTION CONDITION
•  C0020:11
―  Motor relay signal does not correspond to DSC HU/CM OFF signal.
•  C0020:12, C0020:49
―  DSC motor monitor signal does not correspond to DSC HU/CM OFF signal.
―  DSC motor monitor signal does not correspond to DSC HU/CM ON signal.
•  C0020:13
―  Motor relay signal does not correspond to DSC HU/CM ON signal.
•  C0020:71
―  DSC HU/CM motor monitor ON signal is not input within specified time limit or more when motor signal is switched from ON to OFF by DSC HU/CM.
FAIL-SAFE FUNCTION
Refer to “DTC Table” and “Fail-safe function table”. (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)
POSSIBLE CAUSE
•  Fuse (ABS/DSC M 50A) malfunction
•  Open or short circuit in DSC HU/CM internal motor relay, or stuck motor relay
•  Open or short circuit in DSC HU/CM internal pump motor, or frozen pump motor
•  Open circuit or short to ground in the wiring harness between the battery and DSC HU/CM terminal B
•  Open circuit in the wiring harness between DSC HU/CM terminal AL and body ground
•  Poor connection at connectors (female terminal)

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT FUSE CONDITION
•  Is the fuse (ABS/DSC M 50A) normal?
Yes
Go to the next step.
No
Replace the fuse, then go to Step 6.
2
VERIFY PUMP MOTOR OPERATION
•  Switch the ignition to off.
•  Connect the M-MDS to the DLC-2.
•  Switch the ignition ON (engine off).
•  Access PMP_MT_SP active command modes using the M-MDS.
•  Does the pump motor operate?
Yes
Go to Step 6.
No
Go to the next step.
3
INSPECT MOTOR RELAY POWER SUPPLY FOR OPEN CIRCUIT
•  Switch the ignition to off.
•  Disconnect the DSC HU/CM connector.
•  Inspect for continuity between DSC HU/CM terminal B (vehicle harness-side) and the positive battery terminal.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to Step 6.
4
INSPECT MOTOR RELAY POWER SUPPLY FOR SHORT CIRCUIT
•  Inspect for continuity between DSC HU/CM terminal B (vehicle harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 6.
No
Go to the next step.
5
INSPECT PUMP MOTOR GROUND FOR OPEN CIRCUIT
•  Inspect for continuity between DSC HU/CM terminal AL (vehicle harness-side) and body ground.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to the next step.
6
VERIFY THAT THE SAME DTC IS NOT PRESENT
•  Reconnect all disconnected connectors.
•  Clear the DTCs from the memory.
•  Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more.
•  Are the same DTCs present?
Yes
Repeat the inspection from Step 1.
If the malfunction recurs, replace the DSC HU/CM, then go to the next step.
(See DSC HU/CM REMOVAL/INSTALLATION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
(See DSC HU/CM REMOVAL/INSTALLATION [WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
(See DSC HU/CM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
(See DSC HU/CM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No
Go to the next step.
7
VERIFY THAT NO OTHER DTCS ARE PRESENT
•  Are any other DTCs output?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)
No
DTC troubleshooting completed.