Spicer TPCS Troubleshooting Guide - Manual (Page 28)

25
Service Codes
Group: 5C! (Codes 33, 34)
Type: PCU Sensor
Code Description
Group 5C! displays when the Electronic Control Unit (ECU)
receives an unusually high or low reading from the PCU
Sensor. A diagnostic tool will specify 33 for a high reading and
34 for a low reading.
Initial troubleshooting steps involve checking for a
shorted-to-ground or an open PCU Sensor circuit.
If the circuits check out OK, secondary causes could involve a
faulty transducer or a faulty Electronic Control Unit.
See "Troubleshooting Tips" for general guidelines on system
diagnostics.
System Mode Condition Possible Causes
(Listed in Likely Order of Occurrence)
No operation No PCU sensor reading - PCU Sensor electrically disconnected.
- PCU Sensor signal wire open.
- PCU Sensor signal wire shorted to ground.
- PCU Sensor XDCR VREF wire open.
- PCU Sensor XDCR VREF wire shorted to ground.
- PCU Sensor XDCR COMMON wire open.
- Faulty PCU Sensor.
- Faulty Electronic Control Unit.
No operation High pressure transducer
reading - PCU Sensor signal wire shorted to VBATT or XDCR VREF.
- Faulty PCU Sensor.
- Faulty Electronic Control Unit.
PCU Sensor
Harness Connector
ECU
Harness Connector
A B
G
3
2
1
A
A
B
B
C
C
C
D
D
D
E
E
E
F
F
F
G
G H J K
H
H
J
J
K
K
A B C