Traction Power Amplifier Fault Codes; Tpa Code Led Off; Corrective Actions And Checks - Toyota 7BPUE15 Service Manual

Section 6. Codes and Tests

Traction Power Amplifier Fault Codes

Fault Codes
Figure Traction Power Am

TPA Code LED Off

Alarm Sounds
TPA L E D Display
P C Contactor
Speed Limit
How to Clear

Corrective Actions and Checks

Meter Setting
DCV
1
2 DCV
p lifier
No
I
I
Replace or repair bad component
Lead
(+) Lead (-)
a t TPA
51-16
a t TPA
Toyota Orderpicker Model 7BPUE 15 Service Manual
An internal microcontroller automatically
checks the function of the traction power
amplifier. When this microcontroller detects a
fault, it signals the appropriate fault code
through the light emitting diode (LED) on the
front of the traction
not the codes that appear on the operator
display and tractor manager.
Under normal operation, the LED flashes a
single flash a t approximately one flash per
second (a "heartbeat" indicator).
flash code signals the power amplifier has
detected a fault within itself. The code
continues flashing until corrected.
is
Expected Results
amplifier. These are
two-digit
A
Step Passed Step Failed
Replace STM
Step 2
Replace TPA Troubleshoot
wire from STM