Workshop Manual

6E–85
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
No Malfunction Indicator Lamp (MIL)
Step Action Value(s) Yes No
1 Was the “On-Board Diagnostic (OBD) System Check”
performed?
— Go to Step 2
Go to OBD
System
Check
2 Attempt to start the engine.
Does the engine start?
— Go to Step 3 Go to Step 6
3 Check the meter fuse for the instrument cluster ignition
feed circuit.
Is the fuse OK?
— Go to Step 4 Go to Step 16
4 Ignition “ON”, probe the ignition feed circuit at the
cluster connector with a test light to ground.
Is the test light “ON”?
— Go to Step 5 Go to Step 13
5 1. Ignition “OFF”.
2. Disconnect the PCM.
3. Jumper the MIL driver circuit at the PCM connector
to ground.
4. Ignition “ON”.
Is the MIL “ON”?
— Go to Step 10 Go to Step 11
6 Check the PCM ignition feed and battery feed fuses (15
A engine fuse and 15 A PCM fuse).
Are both fuses OK?
— Go to Step 7 Go to Step 15
7 1. Ignition “OFF”.
2. Disconnect the PCM.
3. Ignition “ON”.
4. Probe the ignition feed circuit at the PCM harness
connector with a test light to ground.
Is the test light “ON”?
— Go to Step 8 Go to Step 12
8 Probe the battery feed circuit at the PCM harness
connector with a test light to ground.
Is the test light “ON”?
— Go to Step 9 Go to Step 14
9 Check for a faulty PCM ground connection.
Was a problem found?
— Verify repair Go to Step 10
10 Check for damaged terminals at the PCM.
Was a problem found?
— Verify repair Go to Step 17
11 Check for an open MIL driver circuit between the PCM
and the MIL.
Was a problem found?
— Verify repair Go to Step 18
12 Substitute a known “good” relay for the PCM main
relay.
Was the malfunction fixed?
— Verify repair Go to Step 13
13 Repair the open in the ignition feed circuit.
Is the action complete?
— Verify repair —
14 Locate and repair the open PCM battery feed circuit.
Is the action complete?
— Verify repair —