Code No. P2530: Ignition Switch-IG1 Circuit

OPERATION

When the ignition switch is turned on, the ignition switch ON signal is input into the engine-ECU connector terminal IGN and also into the ETACS-ECU.

FUNCTION

The engine-ECU compares the ignition switch ON signal sent from the ignition switch with ignition switch information sent from ETACS-ECU. The engine-ECU checks for the abnormality.

TROUBLE JUDGEMENT

Check Condition

Ignition switch: "ON" → "LOCK" (OFF)

Judgement Criterion

While the ignition switch ON signal is input into the engine-ECU, the ignition switch information, sent from the ETACS-ECU via CAN, is turned to OFF from ON. This allows the CAN to be stopped.

FAIL-SAFE AND BACKUP FUNCTION

None

PROBABLE CAUSES

Short circuit in ignition switch-IG1 circuit or loose connector contact
Failed CAN
Failed ETACS-ECU
Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis

Use M.U.T.-III to perform CAN bus line diagnosis.

Q. Is the check result normal?

	Go to Step 2.

	Repair CAN bus line (Refer to GROUP 54C - Troubleshooting - CAN Bus Diagnostics Table ).

STEP 2. M.U.T.-III diagnosis code

Confirm whether the diagnosis code is stored in the ETACS-ECU.

Q. Is diagnosis code stored?

	Perform troubleshooting of ETACS (Refer to GROUP 54A - ETACS - Diagnosis Code Chart ).

	Go to Step 3.

STEP 3. Check of short circuit to earth in IGN line between engine-ECU connector and ETACS-ECU connector.

Q. Is the check result normal?

	Go to Step 4.

	Repair the connector(s) or wiring harness.

STEP 4. M.U.T.-III diagnosis code

Reconfirmation of diagnosis code.

Q. Is diagnosis code stored?

	Go to Step 5.

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 5. Replace the ETACS-ECU

After replacing the ETACS-ECU, reconfirm whether the diagnosis code is stored.

Q. Is diagnosis code stored?

	Replace the engine-ECU.

	Check end.