DTC P0500 (Flash Code 25) Vehicle Speed Sensor (RZ4E-TC)

1. Engine control system check

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) Diagnostic system check-engine controls".

2. Prioritized DTC check

1) Connect the scan tool.

2) Turn OFF the ignition switch for 30 seconds or more.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool. Is DTC P0219 set at the same time?

Yes

Go to DTC P0219 diagnosis.

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0219 (Flash Code 543) Engine Overspeed Condition".

No

=>Go to Vehicle speed check.

3. Vehicle speed check

1) Operate the vehicle while observing the Vehicle Speed parameter on the scan tool. Does the Vehicle Speed parameter display the correct vehicle speed?

Yes

Go to Intermittent conditions of engine.

Refer to "202.Engine 15D.Symptom(RZ4E-TC) intermittent conditions of engine".

No

=>Go to ABS-related DTC check.

4. ABS-related DTC check

1) Observe the ABS related DTC information on the scan tool. Is an ABS-related DTC set?

Yes

Go to the applicable DTC diagnosis.

No

=>Go to Vehicle speed signal voltage check.

5. Vehicle speed signal voltage check

1) Turn OFF the ignition switch.

2) Disconnect the EHCU harness connector (C13).

3) Turn ON the ignition switch.

4) Observe the Vehicle Speed parameter on the scan tool while intermittently connecting and disconnecting a test lamp between the vehicle speed signal input circuit (pin 2 of C13) and the battery power supply. Is an arbitrary vehicle speed displayed when the test lamp is connected?

Refer to "RHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to EHCU harness connector inspection.

No

=>Go to Inspection for open circuit and short circuit in vehicle speed signal input circuit.

6. EHCU harness connector inspection

1) Inspect for poor connections at the EHCU harness connector (pin 2 of C13). Is the connection status normal?

Refer to "RHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to EHCU replacement.

No

Repair the connections as necessary.

=>Go to Repair verification.

7. Inspection for open circuit and short circuit in vehicle speed signal input circuit

1) Inspect the vehicle speed signal input circuit between the ECM (pin 19 of C7) and the EHCU (pin 2 of C13) for the following. Is the result normal?

Refer to "RHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to ECM harness connector inspection.

No

Repair the circuit as necessary.

=>Go to Repair verification.

8. ECM harness connector inspection

1) Inspect for poor connections at the ECM harness connector (pin 19 of C7). Is the connection status normal?

Refer to "RHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to ECM replacement.

No

Repair the connections as necessary.

=>Go to Repair verification.

9. EHCU replacement

Refer to "4.Brakes 4Z.Brake Electrical Control EHCU removal".

Refer to "4.Brakes 4Z.Brake Electrical Control EHCU installation".

Refer to "4.Brakes 4Z.Brake Electrical Control EHCU setting".

Procedure completion

=>Go to Repair verification.

10. ECM replacement

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) ECM removal".

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) ECM installation".

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) ECM setting".

Procedure completion

=>Go to Repair verification.

11. Repair verification

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch for 30 seconds or more.

3) Start the engine.

4) Operate the vehicle under the conditions for running the DTC.

5) Observe the DTC information with a scan tool.