DTC P0567 (Flash Code 517) Cruise Control Resume Signal (RZ4E-TC)

1. Engine control system check

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

2. Current 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 a DTC set?

Yes

=>Go to Cruise control resume switch operation signal input check.

No

Go to Intermittent conditions of engine.

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

=>Go to Repair verification.

3. Cruise control resume switch operation signal input check

1) Turn OFF the ignition switch.

2) Disconnect the cruise control steering wheel switch harness connector (B34).

3) Connect a fused jumper wire between the cruise control switch signal circuit and the low reference circuit (pins 1 and 12 of B34).

4) Turn ON the ignition switch.

5) Observe the Cruise Resume/Acceleration Switch parameter on the scan tool. Does the scan tool display ON when the circuits are connected with a jumper wire, and display OFF when the circuits are not 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

Replace the cruise control steering wheel switch.

Refer to "9.Body, Cab, Accessories 9C.Electrical Control, Entertainment cruise control steering wheel switch removal".

Refer to "9.Body, Cab, Accessories 9C.Electrical Control, Entertainment cruise control steering wheel switch installation".

=>Go to Repair verification.

No

=>Go to Inspection for short to ground in cruise control switch signal circuit.

4. Inspection for short to ground in cruise control switch signal circuit

1) Inspect the cruise control switch signal circuit between the ECM (pin 65 of C7) and the cruise control steering wheel switch (pin 12 of B34) 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.

5. ECM harness connector inspection

1) Inspect for poor connections at the ECM harness connector (pins 65 and 41 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.

6. 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.

7. Repair verification

1) Clear the DTC with a scan tool.

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

3) Turn ON the ignition switch.

4) While observing the Cruise Resume/Acceleration Switch parameter on the scan tool, operate the switch. Is ON displayed when the switch is operated and OFF when it is released?

Yes

Observe the DTC information with a scan tool.

No

=>Go to Cruise control resume switch operation signal input check.