ELECTRICAL
Event Code 745
290
M4.8-1055-080
03 Rev. 10/09
Event Code 745
Steering Feedback (POT4) Sensor Issue.
The system has detected the steer feedback pot
(POT4) movement of 20 degrees without any input
from the steer tiller encoder (ECR3) if this event is
logged, a re-key will only log a 318 code.
Note: This event can be caused if the 12 Vdc supply in
ACCESS 3 gets shorted to BNEG in the accelerator
pot circuit. This issue can occur along with an event
code 318.
Step 1: Using Analyzer menu, compare ECR3 input at
A2.4.3 to POT4 input at A2.3.8 and verify both inputs
are consistent when tiller is moved.
• If: Inconsistency is in ECR3 circuit.
– Then proceed to Step 2.
• If: Inconsistency is in POT4 circuit.
– Then proceed to Step 4.
Step 2: Check 5 Vdc power supply between
CA602-1(+) and CA602-4(-).
• If: Power supply is 5 Vdc.
– Then proceed to Step 3.
• If: Power supply is not 5 Vdc.
– Then trace/repair wiring from ACCESS 7,
check for short to +5 V or BNEG.
Step 3: Check continuity from Channel A (CA602-3)
and Channel B (CA602-2) to ACCESS 7 (CA231-5 and
CA231-4) respectively.
• If: No continuity.
– Then check replace connections or wiring.
• If: Continuity checks correct.
– Then replace ECR3.
Step 4: Check for 11.3 Vdc to POT4 between CA601-A
and CA601-B.
• If: Power supply is approximately 11.3 Vdc.
– Then proceed to Step 5.
• If: Power supply is not 11.3 Vdc.
– Then trace/repair wiring, check for short to +BV
or BNEG.
Step 5: Check wiper wiring between CA403-17 and
CA601-C.
• If: Wiring is correct.
– Then replace POT4.
• If: Wiring is not correct.
– Then trace/repair wiring, check for short to +BV
or BNEG.
Crown 2007 PF15665-80 Rev. 10/09
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