Operation
0850−1/A1
Winterthur Gas & Diesel Ltd.
29/ 39
Failure Text
ME exhaust waste gate not closed (ID 5.5)
FCM−20 No. LED Failure ID Display
Indication #01 InjQ 155 5.5
Cause Butterfly valve stays open at a load range of less than 85%. Connection to the position sensor
ZS5372C is broken, or there is a short circuit (failure signal released after 20 seconds)
Procedure ⇒ Use flexView to do a check of the waste gate position. Make sure that the flexView card
ExhWgt, para Waste Gate Position shows Not Closed.
⇒ Make sure that there is an air supply to the position sensor ZS5372C.
⇒ Between FCM−20 #01 (plug X27, terminals 89 / 90) and position sensor ZS5372C, make sure
that the cables have no damage and are connected correctly.
⇒ If necessary, repair or replace damaged cables.
⇒ Do a check of the mechanical part of the waste gate.
⇒ If necessary, replace the position sensor ZS5372C.
⇒ For more data, see 0820−1, paragraph 5 Exhaust waste gate.
Failure Text ME exhaust waste gate not open (ID 5.6)
FCM−20 No. LED Failure ID Display
Indication #05 InjQ 156 5.6
Cause Butterfly valve stays closed at a load range of more than 85%. Connection to the solenoid
valve ZV7076C is broken, or there is a short circuit (failure signal released after 20 seconds).
Procedure ⇒ Decrease engine power.
⇒ Between FCM−20 #05 (plug X15 terminals 39 / 40) and the solenoid valve ZV7076C, make
sure that the cables have no damage and are connected correctly.
⇒ If necessary, repair or replace damaged cables.
⇒ Make sure that the butterfly valve operates correctly (see 8135−1, paragraph 3 Function
check).
⇒ If necessary, replace the butterfly valve and / or the solenoid valve ZV7076C.
⇒ For more data, see 0820−1, paragraph 5 Exhaust waste gate.
Failure Text ME scavenge air pressure high (ID 5.7)
FCM−20 No. LED Failure ID Display
Indication #05 InjQ 157 5.7
Cause Exhaust waste gate has a malfunction(engines with LLT during high of more than 85%).
Scavenge air pressure is more than 105% of the CMCR setting. Cable between
FCM−20−#05 is broken, or there is a short circuit (failure signal released after 2 seconds)
Procedure ⇒ Decrease engine power.
⇒ Make sure that the waste gate operates correctly.
⇒ Between FCM−20 #05 and the solenoid valve ZV7076C, make sure that the cables have no
damage and are connected correctly.
⇒ If necessary, repair or replace damaged cables.
⇒ Make sure that the butterfly valve operates correctly (see 8135−1, paragraph 3 Function
check).
⇒ If necessary, replace the butterfly valve and / or the solenoid valve ZV7076C.
⇒ For more data, see 0820−1, paragraph 5 Exhaust waste gate.
Remark: It is possible that this failure is related to Failure ID 156.
2014
Failures and Defects of WECS Components
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