engine oil pressure warning light does not turn off even when the engine is running

1. Engine oil pressure warning light does not turn off even when the engine is running diagnostics

1. Pre-check and visual inspection

1) Inspect that the engine oil level is normal.

Refer to "1.Engine 1E.Lubrication(4JJ3 with DPD) engine oil inspection".

Refer to "1.Engine 1E.Lubrication(4JJ3 without DPD) engine oil inspection".

Refer to "1.Engine 1E.Lubrication(RZ4E-TC) engine oil inspection".

2) Check for any interference from aftermarket electronic components such as two-way radios or lights.

Turn OFF or remove any aftermarket electronic components to ensure that there is no influence on inspections or operations.

2. Components inspection

1) Inspect the engine oil pressure switch.

Refer to "1.Engine 1E.Lubrication(4JJ3 with DPD) oil pressure switch inspection".

Refer to "1.Engine 1E.Lubrication(4JJ3 without DPD) oil pressure switch inspection".

Refer to "1.Engine 1E.Lubrication(RZ4E-TC) oil pressure switch inspection".

If a malfunction is found in the engine oil pressure switch, replace it.

Refer to "1.Engine 1E.Lubrication(4JJ3 with DPD) oil pressure switch removal".

Refer to "1.Engine 1E.Lubrication(4JJ3 with DPD) oil pressure switch installation".

Refer to "1.Engine 1E.Lubrication(4JJ3 without DPD) oil pressure switch removal".

Refer to "1.Engine 1E.Lubrication(4JJ3 without DPD) oil pressure switch installation".

Refer to "1.Engine 1E.Lubrication(RZ4E-TC) oil pressure switch removal".

Refer to "1.Engine 1E.Lubrication(RZ4E-TC) oil pressure switch installation".

2) Inspect the instrument panel cluster.

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. instrument panel cluster diagnostics".

If a malfunction is found in the instrument panel cluster, replace it.

Caution

If the instrument panel cluster is replaced with a new one, write the vehicle information to the instrument panel cluster.

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. instrument panel cluster removal".

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. instrument panel cluster installation".

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. instrument panel cluster setting".

3. Circuit inspection

1) Check that the ground point is normal.

Repair or clean any ground points that are improperly installed or significantly dirty.

2) Check that the harnesses and connectors are normal.

Inspect for the following circuits for an open circuit, short, poor connections at the connectors, and abnormal conditions such as worn or bent harnesses.

Between the instrument panel cluster and the engine oil pressure switch

Caution

When checking the continuity between the harnesses, disconnect the battery negative terminal.

Refer to "201.General Information 14A.Service Information Guide Preliminary and post procedures".