Table 226
Diagnostic Trouble Codes for the Digital Throttles
J1939 Code PDL Code
Code Description
(code descriptions may vary)
Comments
29-3 774-3
Accelerator Pedal Position 2 : Voltage Above
Normal
The Electronic Control Module (ECM) detects the following
conditions:
The ECM has been powered for 3 seconds.
Diagnostic code 168-4 is not active.
There are no active 678 or 41 codes.
The setting for the upper diagnostic limit has been exceeded
for one second.
If equipped, the warning lamp will come on. The diagnostic
code will be logged.
29-4 774-4
Accelerator Pedal Position 2 : Voltage Below
Normal
The ECM detects the following conditions:
The ECM has been powered for 3 seconds.
Diagnostic code 168-4 is not active.
There are no active 678 or 41 codes.
The setting for the lower diagnostic limit has been exceeded
for one second.
If equipped, the warning lamp will come on. The diagnostic
code will be logged.
29-8 774-8
Accelerator Pedal Position 2 : Abnormal Fre-
quency, Pulse Width or Period
The ECM detects the following conditions:
The signal frequency from the digital throttle position sensor is
equal to 0% or 100% for more than 2 seconds.
The ECM has been powered for at least 3 seconds.
Diagnostic codes 29-3, 774-3, 29-4, and 774-4 are not active.
There are no active 678 or 41 codes.
The ECM sets the Throttle Position to “0%” .
If equipped, the warning lamp will come on. The diagnostic
code will be logged if the engine is running. The diagnostic
code will not be logged if the engine is cranking.
91-3 91-3
Accelerator Pedal Position 1 : Voltage Above
Normal
The Electronic Control Module (ECM) detects the following
conditions:
The ECM has been powered for 3 seconds.
Diagnostic code 168-4 is not active.
There are no active 678 or 41 codes.
The setting for the upper diagnostic limit has been exceeded
for one second.
If equipped, the warning lamp will come on. The diagnostic
code will be logged.
(continued)
UENR4469-36 425
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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