## Diesel Engine Management System

#### OBD System Troubleshooting (cont'd)

11-150

Engine Cranks But Will Not Run

1. Check the ''On Board Diagnostic (OBD) System Check''.

Was the OBD System Check performed?

YES – Go to step 2.

NO – Go to OBD System Check.

1. Check the immobiliser control system.

Is there an abnormality in the immobiliser control system?

YES – Check the immobiliser control system.

NO – Go to step 3.

1. Check for the following conditions:

If the problem is found, repair as necessary.

- Fuel volume.
- Engine oil condition.
- Damaged or faulty intake air duct.
- Faulty air cleaner and filter.
- Damaged or faulty fuel pipe.
- Damaged or faulty fuses.

- Main relay (20A) fuse
- Ignition 1 (7.5A) fuse
- Glow relay (60A) fuse

- Faulty battery voltage.

1. Turn the ignition switch OFF.

1. Install a scan tool.

1. Turn the ignition switch ON (II).

1. Check the engine cranking speed with the scan tool. Turn the engine cranking.

Is the engine cranking speed about 200 rpm (min-1)?

YES – Go to step 8.

NO – Go to (Starter motor inspection).

1. Perform a compression pressure measurement. Refer to (compression pressure measurement).

Standard:

about 2,800 kPa (28.6 kgf/cm2, 407 psi) at 200 rpm (min-1)

(When the ECT is about 50°C (122°F))

Is a compression pressure standard?

YES – Go to step 10.

NO – Go to step 9.

1. Check for the following conditions:

If the problem is found, repair as necessary.

Refer to engine mechanical.

- Faulty or incorrect valve clearances.
- Fuel injector fixing condition or other damaged.
- Leaking head gasket.
- Excessive valve deposit.

Is a problem found?

YES – Repair as necessary.

NO – Go to step 10.

1. Turn the ignition switch OFF.

1. Disconnect ECM connector.

1. Turn the ignition switch ON (II).

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