Diagnosis Procedure

1. Turn ignition switch ON.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Check for DTC P2558 being current on the CONSULT screen.

Is applicable DTC detected?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .

1. Turn ignition switch OFF.
2. Disconnect coolant level sensor connector E91.
3. Inspect the harness and sensor connector pins for the following:
   • Loose connector
   • Corroded pins
   • Bent or broken pins
   • Pushed back or expanded pins
   • Moisture in or on the connector
   • Missing or damaged connector seals
   • Dirt or debris on or in the connector pins
   • Connector shell broken
   • Wire insulation damage
   • Damaged connector locking tab

Is the inspection result normal?

YES

GO TO 3 .

NO

Repair or replace error-detected parts.

1. Coolant level sensor connector E91 remains disconnected.
2. Turn ignition switch ON.
3. Check for DTC P2559 being current and P2558 being past on the CONSULT screen after 1 minute.

Is the inspection result normal?

YES

GO TO 4 .

NO

GO TO 5 .

1. Turn ignition switch OFF.
2. Connect coolant level sensor connector E91.
3. Turn ignition switch ON.
4. Check for DTC P2558 being current on the CONSULT screen after 30 seconds.

Is the inspection result normal?

YES

Replace the engine coolant level sensor. Refer to Exploded View .

NO

The removal and installation of the connector corrected the fault.

1. Turn ignition switch OFF.
2. Disconnect ECM connector E93.
3. Inspect the harness and module connector pins for the following:
   • Loose connector
   • Corroded pins
   • Bent or broken pins
   • Pushed back or expanded pins
   • Moisture in or on the connector
   • Missing or damaged connector seals
   • Dirt or debris on or in the connector pins
   • Connector shell broken
   • Wire insulation damage
   • Damaged connector locking tab

Is the inspection result normal?

YES

GO TO 6 .

NO

Repair or replace error-detected parts.

1. Disconnect ECM connector E93 and coolant level sensor connector E91.
2. Check resistance between ECM connector E93 and coolant level sensor connector E91.

   ECM		Coolant level sensor		Resistance
   Connector	Terminal	Connector	Terminal
   E93	75	E91	2	< 10 Ω

Is the inspection result normal?

YES

GO TO 7 .

NO

An open signal circuit has been detected in the engine harness. Repair or replace the engine harness.

1. Disconnect ECM connector E93 and coolant level sensor connector E91.
2. Check resistance between ECM connector E93 and coolant level sensor connector E91.

   ECM		Coolant level sensor		Resistance
   Connector	Terminal	Connector	Terminal
   E93	41	E91	1	< 10 Ω

Is the inspection result normal?

YES

GO TO 8 .

NO

An open signal circuit has been detected in the engine harness. Repair or replace the engine harness.

Check resistance between the terminals of ECM connector E93.

Is the inspection result normal?

YES

GO TO 9 .

NO

A pin to pin short circuit has been detected on the signal circuit in the engine harness. Repair or replace the engine harness.

Check resistance between ECM connector E93 and ground.

Is the inspection result normal?

YES

GO TO 10 .

NO

A short to ground on the signal circuit has been detected in the engine harness. Repair or replace the engine harness.

1. Turn ignition switch ON.
2. Connect all components.
3. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
4. Check for DTC P2558 being past on the CONSULT screen after 30 seconds.

Is the inspection result normal?

YES

The removal and installation of the connector corrected the fault.

NO

Replace ECM. Refer to Removal and Installation .