Dtc 1652- Tps1 Loss Of Communications - JLG 1200SJP Service Maintenance Manual

DTC 1652- TPS1 Loss of Communications

• Throttle Actuator (with serial/digital position feedback)
• Check Condition- Key On, Engine Running and/or Stopped
• Fault Condition- ECM is expecting to receive throttle posi-
tion information from the throttle actuator and is not.
• Corrective Action(s)- Illuminate MIL, sound audible warn-
ing or illuminate secondary warning lamp. Shutdown
engine.
• Non-emissions related fault
In the case of a throttle actuator with serial/digital position
feedback, the ECM receives a constant data stream from the
throttle actuator. If the communication is absent or inter-
rupted, the ECM can no longer control the position of the
throttle.
This fault will set if the key is on, the throttle actuator is receiv-
ing power, and the ECM is not receiving digital information
from the actuator.
3121142
4 P IN K /W H IT E
3
T A N /O R A N G E
5 G R E E N /R E D
1 P U R P LE /BL U E
2
BLA C K /G R E E N
Diagnostic Aids
• Verify that the throttle actuator 5V supply voltage is pres-
• Check for a all four TPS feedback wires for short circuits.
• Check TPS SER+ and TPS SER- wire routing with respect to
– JLG Lift –
SECTION 3 - CHASSIS & TURNTABLE
ent at the actuator.
noise sources (ignition coils, spark plug coil wires, etc.) and
shield if necessary.
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