Dell 2130cn Service Manual page 263

Step
Checking the HARN ASSY L SIDE for continuity
Disconnect J23 from the PWBA MCU.
23
Disconnect P231 from the SOLENOID FEED MSI.
Is each cable of J23 <=> P231 continuous?
Checking the power to the SOLENOID FEED MSI
Disconnect J23 from the PWBA MCU.
24 Is the voltage across P23-1pin <=> ground on the PWBA
MCU, about +24 VDC when the Interlock Switch (HARN
ASSY INTERLOCK) is pushed?
Checking the SOLENOID FEED MSI for resistance
25 Disconnect P/J231 of the SOLENOID FEED MSI.
Is the resistance across J231-1 and J231-2 about 96 ohm?
Checking the connectors of the SENSOR PHOTO (Regi
Sensor) for connection
Check the connections between the PWBA MCU and
SENSOR PHOTO.
Are P/J23 and P/J232 connected correctly?
26
Checking the HARN ASSY L SIDE for continuity
Disconnect J23 from the PWBA MCU.
27
Disconnect J232 from the SENSOR PHOTO.
Is each cable of J23 <=> J232 continuous?
Checking the power to the SENSOR PHOTO
Disconnect J23 from the PWBA MCU.
28
Is the voltage across P23-3pin <=> ground on the PWBA
MCU, about +3.3 VDC?
Checking the SENSOR PHOTO for operation
Check the voltage across J23-5pin <=> ground on the
PWBA MCU.
29 Remove the CHUTE LOW (PL3.2.27) once to check the
operation.
Does the voltage change, when the actuator (ACTUATOR
REGI IN) is operated?
Check
1 - 237
Chapter 1 Troubleshooting
Remedy
Yes
Replace the
Go to step 24. HARN ASSY L
SIDE.
Replace the
PWBA MCU.
Go to step 25. (Refer to Removal
43/ Replacement
11.)
Replace the Replace the
PWBA MCU. SOLENOID FEED
(Refer to Removal MSI. (Refer to
43/ Replacement Removal 35/
11.) Replacement 19.)
Reconnect the
connector(s) P/
Go to step 27.
J23 and/or P/J232
correctly.
Replace the
Go to step 28. HARN ASSY L
SIDE.
Replace the
PWBA MCU.
Go to step 29. (Refer to Removal
43/ Replacement
11.)
Replace the
PWBA MCU. Replace the
(Refer to Removal SENSOR
43/ Replacement PHOTO.
11.)
No