DTC C0020:01/C0020:11/C0020:13/C0020:16/C0020:19/C0020:71 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2806200

DTC

C0020:01, C0020:11, C0020:13, C0020:16, C0020:19, C0020:71

Pump motor, motor relay

DETECTION CONDITION

•  C0020:01

―  DSC HU/CM detects each gate signal as off for a certain period of time even though each gate voltage is output.

•  C0020:11

―  DSC HU/CM detects motor relay signal as on for a continuous 2 s while the pump motor is stopped.

•  C0020:13

―  DSC HU/CM detects motor relay signal as stuck off while the pump motor is operating.

•  C0020:16

―  DSC HU/CM detects pump motor power supply voltage as less than 6 V for a continuous 1 s.

•  C0020:19

―  DSC HU/CM detects over-current in motor relay related-circuit.

•  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 “Fail-safe Function Malfunction Contents”. (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)

POSSIBLE CAUSE

•  Fuse (MAIN 200A, ABS/DSC M 50A) malfunction

•  Open circuit or short to ground in the wiring harness between the battery and DSC HU/CM terminal AK

•  Open circuit in the wiring harness between DSC HU/CM terminal A and body ground

•  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

•  Poor connection at connectors (female terminal)

DTC	C0020:01, C0020:11, C0020:13, C0020:16, C0020:19, C0020:71	Pump motor, motor relay
DETECTION CONDITION	• C0020:01 ― DSC HU/CM detects each gate signal as off for a certain period of time even though each gate voltage is output. • C0020:11 ― DSC HU/CM detects motor relay signal as on for a continuous 2 s while the pump motor is stopped. • C0020:13 ― DSC HU/CM detects motor relay signal as stuck off while the pump motor is operating. • C0020:16 ― DSC HU/CM detects pump motor power supply voltage as less than 6 V for a continuous 1 s. • C0020:19 ― DSC HU/CM detects over-current in motor relay related-circuit. • 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 “Fail-safe Function Malfunction Contents”. (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)
POSSIBLE CAUSE	• Fuse (MAIN 200A, ABS/DSC M 50A) malfunction • Open circuit or short to ground in the wiring harness between the battery and DSC HU/CM terminal AK • Open circuit in the wiring harness between DSC HU/CM terminal A and body ground • 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 • Poor connection at connectors (female terminal)

Diagnostic Procedure

STEP

INSPECTION

ACTION

1

INSPECT FUSE CONDITION

•  Is the fuse (MAIN 200A, ABS/DSCM 50A) normal?

Yes

Go to the next step.

No

Replace the fuse, then go to Step 6.

2

VERIFY PUMP MOTOR OPERATION

•  Using the M-MDS, perform the simulation inspection for pump motor.
(See SIMULATION INSPECTION [DYNAMIC STABILITY CONTROL (DSC)].)

•  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 off.

•  Disconnect the DSC HU/CM connector.

•  Inspect for continuity between DSC HU/CM terminal AK and the battery positive terminal.

•  Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between DSC HU/CM terminal AK and the battery positive terminal.

If there is a common connector:

•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

•  Repair or replace the malfunctioning part.

If there is no common connector:

•  Repair or replace the wiring harness which has an open circuit.

Go to Step 6.

4

INSPECT MOTOR RELAY POWER SUPPLY FOR SHORT CIRCUIT

•  Inspect for continuity between DSC HU/CM terminal AK and body ground.

•  Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between DSC HU/CM terminal AK and the battery positive terminal.

If there is a common connector:

•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

•  Repair or replace the malfunctioning part.

If there is no common connector:

•  Repair or replace the wiring harness which has a short to ground.

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 A 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 DTC TROUBLESHOOTING COMPLETED

•  Using the M-MDS, clear the DTC from the DSC HU/CM.
(See CLEARING DTC [DYNAMIC STABILITY CONTROL (DSC)].)

•  Start the engine and drive the vehicle at 6 km/h {4 mph} or more.

•  Gradually slow down and stop vehicle.

•  Using the M-MDS, perform the DSC HU/CM DTC inspection.
(See DTC INSPECTION [DYNAMIC STABILITY CONTROL (DSC)].)

•  Is the same Pending DTC present?

Yes

Repeat the inspection from Step 1.

•  If the malfunction recurs, replace the DSC HU/CM.
(See DSC HU/CM REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

7

VERIFY NO DTC IS PRESENT

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)

No

DTC troubleshooting completed.

STEP	INSPECTION		ACTION
1	INSPECT FUSE CONDITION • Is the fuse (MAIN 200A, ABS/DSCM 50A) normal?	Yes	Go to the next step.
1		No	Replace the fuse, then go to Step 6.
2	VERIFY PUMP MOTOR OPERATION • Using the M-MDS, perform the simulation inspection for pump motor. (See SIMULATION INSPECTION [DYNAMIC STABILITY CONTROL (DSC)].) • Does the pump motor operate?	Yes	Go to Step 6.
2		No	Go to the next step.
3	INSPECT MOTOR RELAY POWER SUPPLY FOR OPEN CIRCUIT • Switch the ignition off. • Disconnect the DSC HU/CM connector. • Inspect for continuity between DSC HU/CM terminal AK and the battery positive terminal. • Is there continuity?	Yes	Go to the next step.
3		No	Refer to the wiring diagram and verify whether or not there is a common connector between DSC HU/CM terminal AK and the battery positive terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 6.
4	INSPECT MOTOR RELAY POWER SUPPLY FOR SHORT CIRCUIT • Inspect for continuity between DSC HU/CM terminal AK and body ground. • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between DSC HU/CM terminal AK and the battery positive terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. Go to Step 6.
4		No	Go to the next step.
5	INSPECT PUMP MOTOR GROUND FOR OPEN CIRCUIT • Inspect for continuity between DSC HU/CM terminal A and body ground. • Is there continuity?	Yes	Go to the next step.
5		No	Repair or replace the wiring harness, then go to the next step.
6	VERIFY DTC TROUBLESHOOTING COMPLETED • Using the M-MDS, clear the DTC from the DSC HU/CM. (See CLEARING DTC [DYNAMIC STABILITY CONTROL (DSC)].) • Start the engine and drive the vehicle at 6 km/h {4 mph} or more. • Gradually slow down and stop vehicle. • Using the M-MDS, perform the DSC HU/CM DTC inspection. (See DTC INSPECTION [DYNAMIC STABILITY CONTROL (DSC)].) • Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION.) Go to the next step.
6		No	Go to the next step.
7	VERIFY NO DTC IS PRESENT • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)
7	VERIFY NO DTC IS PRESENT • Are any DTCs present?	No	DTC troubleshooting completed.