Bosch Evolution 300 Series Service Manual page 50

Note: Fault codes are not a foolproof system. Never assume that a part has failed based on a displayed fault code. )RU example if the control
module is displaying F30 (open sensor), the failure could be caused by a loose connection or faulty wire harness between the control module and
sensor or the sensor could simply be unplugged.
FAULT LIKELY FAILURE
CODE CONDITION/
CAUSE
F10 Runaway Temperature
F11 Shorted Keypad
F12 Bad Micro Identification
F13 Bad EEPROM Identifica-
tion/Checksum error
F30 Open probe connection
F31 Shorted Probe connec-
tion
F90 Maximum oven door
unlock time exceeded
F91 Maximum oven door
unlock attempts ex-
ceeded
F92 Maximum oven door
open time exceeded
F93 Maximum oven door lock
time exceeded
F94 Maximum oven door lock
attempts exceeded
3:2
Fault Codes From Tech Sheet
1. (F10 only) Check oven temp Vensor Srobe & harness. Replace if necessary. If oven is overheating, disconnect power. If oven continues
to overheat when the power is reapplied, replace control module. Severe overheating may require the entire oven to be replaced should
damage be extensive.
2. (F11, 12 & 13) Disconnect power, wait 30 seconds and reapply power.
3. (F11, 12 & 13) If fault returns upon power-up, replace control module.
1. (F30 or F31) Check resistance at room temperature & compare to RTD Sensor Resistance chart. If resistance does not match the RTD
chart replace RTD Vensor Srobe. Check Vensor wiring harness between control module & Vensor Srobe connector.
2. (F30 or F31) Check resistance at room temperature if less than 500 ohms, replace RTD Vensor Srobe. Check for shorted Vensor Srobe
harness between control module & Srobe connector.
If lock motor runs:
1. Test continuity of wiring between control module and lock switch on lock motor assy. Repair if needed.
2. Advance motor until cam depresses the plunger on lock motor switch. Test continuity of switch contacts. If VZLWFK LV RSHQ UHSODFH
lock motor assy.
3. If motor runs and switch contacts and wiring harness test good, replace the control module
If lock motor does not run:
1
. Test continuity of lock motor windings. Replace lock motor assy if windings are open.
2. Test lock motor operation by using a test cord to apply voltage. If motor does not operate replace lock motor DVV\
3. If motor runs with test cord check continuity of wire harness to lock motor terminals. If harness is good UHSODFH WKH FRQWURO PRGXOH
SUGGESTED CORRECTIVE ACTION