Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

Control Handle Display and Programming

Caution and Error Codes

Code C14 - Arm Angle Reference Warning

Reason Control handle was not in up position at power ON or after the truck has not been used for a time.

Performance Limits Travel is not allowed until code is cleared. How to Clear Code Code is cleared when tiller arm is moved to upright (Top Brake) position.

Possible Causes and Corrective Actions

Control handle stuck in down position a. Check up-stop

Arm angle input stuck ON a. Check arm angle switch “A” and “B” for correct operation. Repair or replace as necessary. b. Check input to power amplifier.

Code C19 - Default parameter warning

Reason

Parameter(s) out-of-range, or incompatible with software version.

Performance Limits Truck functions are not allowed until after this code is cleared. How to Clear Code Parameter area is automatically corrected and then code is cleared.

Possible Causes and Corrective Actions

ETAC parameter area is bad. If the code does not clear after 10 seconds, try restarting the truck. Cycle the truck OFF then ON. If the code does not automatically clear, replace the ETAC.

Code C20 - Thumb Control Warning

Reason Thumb control was not in neutral position at power ON, or a throttle position sensor failure was detected. See “Code E160 - Error In Reversing Circuit” on page5-15.

Performance Limits Truck functions are not allowed until code is cleared. How to Clear Code Code is cleared after problem is corrected.

Possible Causes and Corrective Actions

Thumb control is stuck in drive position. ETAC is bad.

Check the mechanical portions of the throttle controller. Give special attention to the magnet arm alignment with the ETAC sensors and to the non-metallic parts of the emergency reverser.

Code C28 - Master Control ON/OFF Switch Warning

Reason

Power amplifier could not be reset via the CAN-bus at power ON, or power amplifier reports Master Control ON/OFF switch is open.

Performance Limits Truck functions are not allowed after this code has been set. How to Clear Code This code can only be cleared after the problem is resolved and truck is cycled OFF/ON.