13B-444V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC037PREHEATING RELAY
NOTESThis command is only run if fault DF025 Preheating unit diagnostic connection or
DF017 Preheating unit control circuit is present or stored and if no other fault is
present.
Use the Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2, Espace IV
ph2, Mégane II ph2, Scénic II ph2.
IMPORTANT:
– Please observe the cleanliness guidelines and safety advice.
– Make sure the correct type of plug is fitted on the vehicle, slow or fast:
Slow plugs have a black ring
Quick plugs have a white ring.
For Vdiag 20, 24, 34, 38 and 74, if replacing heater plugs by plugs of a different type
(see Replacement of components and Replacing heater plugs).
Before applying the following fault finding procedure, check that the battery voltage is not below 12 V. Otherwise,
recharge the battery.
STEP 1:
Using a multimeter fitted with a current clamp, bring together the 4 heater plug supply wires.
Run command AC037 and measure the current consumed by the 4 heater plugs.
If the value of the current consumed is not between 60 A and 80 A, move on to step 2, otherwise end of fault
finding.
EDC16CP33_V18_AC037 / EDC16CP33_V1C_AC037 / EDC16CP33_V54_AC037 / EDC16CP33_V20_AC037 / EDC16CP33_V58_AC037 /
EDC16CP33_V5C_AC037 / EDC16CP33_V24_AC037 / EDC16CP33_V04_AC037 / EDC16CP33_V08_AC037 / EDC16CP33_V44_AC037 /
EDC16CP33_V4C_AC037 / EDC16CP33_V34_AC037 / EDC16CP33_V38_AC037 / EDC16CP33_V74_AC037 / EDC16CP33_V28_AC037 /
EDC16CP33_V62_AC037 / EDC16CP33_V26_AC037 / EDC16CP33_V60_AC037
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
