Testing; Wiring Diagrams And Schematics; Wire Color Key - Bosch HBL8 50UC Series Service Manual

7.3

Testing

Test with wire harness off at pin header or with circuits open.
Plug Pins Operates
X102 4, 5 Upper oven
and double line break
X103 2, 4 relay coil
X105 7 Upper door latch
motor
X105 6 Upper oven
convection motor
X105 1 Rotisserie motor
X106 1 (common), Upper oven door
6, 7 latch
X107 4, 5 Upper oven
sensor
X107 1, 2, 3 Cooling fan
motors
X207 1,4,5
X202 1, 2 Lower oven
and double line break
X203 3, 5 relay coil
X205 6 Lower door latch
motor
X205 1 Lower oven
convection motor
Explanation
No fail code. If double line break relay
does not close, L2 (120 volts) will not
reach upper oven bake, broil,
convection elements.
Will accept all modes except self-
clean. When oven set to self-clean,
display will be on constantly, doors
will not lock and self-clean will not
start. E106 will appear.
No fail code. Lower oven convection
motor will not work.
No failure code. Rotisserie will not
rotate.
If latch position is not detected during
normal operation, E124/126 will be
displayed.
Controls function normal. When
sensor opens, E101 code will appear.
If sensor shorts, E104 will appear.
Cooling fan is on constantly.
Will accept modes. In ~45 seconds,
E118 will appear in upper oven
display or E218 will appear in lower
oven display when hall sensor does
not detect fan rotation.
No fail code. If double line break relay
does not close, L2 (120 volts) will not
reach lower oven bake, broil,
convection elements.
Will accept all modes except self-
clean. When oven set to self-clean,
display will be on constantly, doors
will not lock and self-clean will not
start. E206 will appear.
No fail code. Lower oven convection
motor will not work. Relay will snap
closed.
Plug Pins Operates
X206 1 (common), Lower oven door
6, 7 latch
X207 3, 6 Lower oven
sensor
X2 Sends display
signal to display
X2 Sends
communication
signals to display
Table 9 Troubleshooting
8

WIRING DIAGRAMS AND SCHEMATICS

The wire color key (Table 10) and element strip diagrams (Figures 23-
24) are shown below. For schematics, please refer to the Built-in
Oven Service Guide (Wiring Diagram) which can be found on
QuickFinder or in the upper oven plenum, near the control module.
8.1

Wire Color Key

BK Black BN
GN Green OR
VT Violet WH
BN/WH Brown/White BU/WH
VT/WH Violet/White YE/BK
Table 10 Wire color key
Service Manual for Bosch Built-in Wall Ovens
Explanation
If latch position is not detected during
normal operation, E224/226 will be
displayed.
Control functions normal. When
sensor opens, E201 code will appear.
If sensor shorts, E204 will appear.
Cooling fan is on constantly.
Glass control panel is completely
dead. 3-position connector
(ground/voltage/data line) should
measure 9.6 VDC.
If no communication between
electronic modules, E005 will display.
Connector positions 1-2 should
measure ~5 VDC.
Brown BU Blue
Orange RD Red
White YE Yellow
Blue/White OR/BK Orange/Black
Yellow/Black
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