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CODE 318
VOLTAGE ON BRAKE LOW WHEN ED IS CLOSED.

This condition is present when low voltage is sensed on both CA402-18 and CA402-19 simultaneously. The probable
cause is the ED contact tips or a mechanical bind in the ED contactor.
Step 1: Raise truck so drive tire is clear of floor and place hardwood blocks under truck frame.
Step 2: Attach meter leads to battery negative and first CA402-18 then CA402-19.
Step 3: Turn key on while pressing the and buttons.
Select ED (A4.3) on display menu.
Press and hold. (drives component)
Check meter reading. Battery volts should be present at CA402-18 and CA402-19 when ED is energized.
If low voltage, then check for a high resistance connection between CA402-18, CA402-19 on
Access 3, and ED tips.
Check for high resistance connection between Access 3 CA402-18, CA402-19 and battery positive.
See note.
Note: If truck operates, then this could be a random nuisance code. Monitor code frequency. If it gradually
increases, replace Access 3.

CODE 384
OUTER BRAKE DRIVER Internal module short circuit. STATUS
Step 1: Measure voltage between CA402-8 and battery negative.
If: Less than 5 volts, check for short circuit between CA402-8 and battery negative. See note.
Note: If truck operates, then this could be a random nuisance code. Monitor code frequency. If it gradually
increases for no apparent reason, replace Access 3.