Diagnosis Procedure

1. Turn ignition switch ON.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Check for DTC P0607-00 being current or past for more than 3 counts on the CONSULT screen.

Is applicable DTC detected?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .

1. Turn ignition switch OFF.
2. Check the battery terminal connections.

Are the battery terminal connections tight and corrosion free?

YES

GO TO 3 .

NO

Tighten and clean the terminals.

1. Turn ignition switch ON.
2. Measure the voltage from the positive battery terminal to the negative battery terminal while trying to start the engine.
   • Normal condition: above 12 V
   • Cranking condition: above 6.2 V

Is the battery voltage within specified range?

YES

GO TO 4 .

NO

Charge or test battery(s). Refer to Work Flow (With EXP-800 NI or GR8-1200 NI) (with Cummins 5.0L) or Work Flow (Without EXP-800 NI or GR8-1200 NI) (with Cummins 5.0L) .

1. Turn ignition switch OFF.
2. Disconnect the 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 5 .

NO

Repair or replace error-detected parts.

Measure the voltage between ECM connector E93 and ground.

Is the inspection result normal?

YES

GO TO 8 .

NO

GO TO 6 .

1. Turn ignition switch OFF.
2. Verify that fuse 68 (5A) is installed correctly and that the fuse is not blown.

Is the inspection result normal?

YES

GO TO 7 .

NO

Replace the fuse.

Check for any add on accessory wiring connected to the battery positive terminal.

• Check for damaged insulation or an installation error that could cause a short to ground.

Is the inspection result normal?

YES

Repair or replace engine harness.

NO

Repair or replace damaged wiring.

1. Turn ignition switch OFF.
2. Disconnect positive terminal from the battery.
3. Check resistance between ECM connector E93 and battery positive terminal.

   ECM		Resistance
   Connector	Terminal				Battery terminal
   E93	83	(+)	< 1.0 Ω

4. Check resistance between ECM connector E93 and battery negative terminal.

   ECM		Resistance
   Connector	Terminal				Battery terminal
   E93	1	(-)	< 1.0 Ω
   	2
   	4

Is the inspection result normal?

YES

GO TO 9 .

NO

Repair or replace the harness.

Check resistance between ECM connector E93 and push button ignition switch connector M46.

Is the inspection result normal?

YES

Refer to Intermittent Incident .

NO

Repair or replace the harness.