PleasureCraft Engine Group 5.0L, Diagnostic Manual

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5.0/5.7/6.0/8.1L Diagnosis 5 - 51
MEFI 4 - PCM
1
Was the “On-Board Diagnostic” (OBD) System Check Go to OBD
performed? — Go to Step 2 System Check
2
Attempt to start the engine.
Does the engine start? — Go to Step 3 Go to Step 6
1. Remove Diagnostic Trouble Code (DTC) tool.
2. Ignition “ON,” engine “OFF.”
3
3. Using a test light connected to ground, probe terminal
“F” of the DLC.
Does the test light illuminate brightly? — Go to Step 4 Go to Step 10
1. Ignition “ON,” engine “OFF.”
2. Using a test light connected to B+, probe terminal “E” of
4
the DLC.
Does the test light illuminate brightly? — Go to Step 11 Go to Step 5
1. Ignition “OFF.”
2. Disconnect ECM “J1” connector.
5
3. Using a DMM, measure the resistance between
ECM harness connector terminal “J1-27” and DLC
terminal “E.”
Is the resistance within the specifi ed values? 0 ohms Go to Step 17 Go to Step 13
6
Check the ECM/BAT fuse.
Is the fuse good? — Go to Step 7 Go to Step 14
1. Ignition “OFF.”
2. Disconnect both ECM connectors.
7
3. Using a test light connected to ground, probe
ECM harness connector pin “J2-1.”
Does the test light illuminate brightly? — Go to Step 8 Go to Step 15
1. Ignition “ON,” engine “OFF.”
8
2. Using a test light connected to ground, probe ECM
harness connector pin “J2-19.”
Does the test light illuminate brightly? — Go to Step 12 Go to Step 9
9
Check the INJ/ECM fuse.
Is the fuse good? — Go to Step 16 Go to Step 16
10
Locate and repair open or short to ground in CKT 440.
Go to OBD
Is action complete? — System Check —
Repair or replace faulty Diagnostic Trouble
11
Code tool.
Go to OBD
Is action complete? — System Check —
1. Locate and repair faulty ECM grounds.
12 2. If a problem is found, repair as necessary.
Go to OBD
Is action complete? — System Check Go to Step 17
Step Action Value Yes No
Diagnostic Procedure (DP) A-1 - No Malfunction Indicator Lamp (MIL) - Diagnostic Trouble
Code (DTC) Tool Installed