13B - 194
DIESEL INJECTION
Fault finding - Interpretation of commands13B
V10 MR-372-J84-13B150$752.mif
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C
AC001
PREHEATING UNIT
NOTESThis command is only carried out if fault DF025 Preheating unit fault finding
connection or DF081 Preheating relay circuit is present or stored and if no other
fault is present.
Refer to the Wiring diagrams Technical Note for the vehicle to locate the fuses and
relays concerned.
Connect the diagnostic tool and turn on the ignition.
With the preheating unit connected:
– connect the negative terminal of the voltmeter to track 8 of the preheating unit,
– connect the positive terminal of the voltmeter to the + 12 V battery,
– run command AC001 Preheating unit.
if the voltmeter does not indicate the battery voltage while the command is running (ten one-second ON/OFF
cycles), contact the Techline:
1. Check the condition of theF01 (70A) fuse which supplies the preheating unit. Replace it if necessary.
2. Check the continuity and the absence of interference resistance on the following connections:
Injection computer connector C, track E2 Track 8 of the preheating unit connector
Injection computer connector C, track A4 Track 9 of the pre-postheating unit connector
Repair if necessary.
3. Check the connections on the preheating unit, heater plugs and injection computer.
Repair if necessary.
4 Measure the resistance of the heater plugs. If the resistance is greater than 2Ω replace the faulty plug(s).
5. Check the continuity and the absence of interference resistance between:
– preheating unit track 1Heater plug for cylinder 3
– preheating unit track 2Heater plug for cylinder 4
– preheating unit track 6Heater plug for cylinder 1
– preheating unit track 7Heater plug for cylinder 2
6. Then check for +12V on track 3 of the preheating relay connector.
If the fault is still present, replace the preheating unit.
AFTER REPAIRRestart the conformity check from the beginning.
EDC16_V44_AC001/EDC16_V48_AC001/EDC16_V4C_AC001
