Dell 2135cn Service Manual page 336

Step
Checking the HARN ASSY L SIDE for continuity
Disconnect J23 from the PWBA MCU.
7
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.
8
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.
9 Remove the CHUTE LOW (PL3.2.27) once to check the
operation.
Does the voltage change, when the actuator (ACTUATOR
REGI IN) is operated?
Version 1 2008.02.01
Check
1 - 308
Chapter 1 Troubleshooting
Remedy
Yes
Replace the
Go to step 8. HARN ASSY L
SIDE.
Replace the
PWBA MCU.
Go to step 9. (Refer to Removal
31/ Replacement
29.)
Replace the
PWBA MCU. Replace the
(Refer to Removal SENSOR
31/ Replacement PHOTO.
29.)
No