DRIVEABILITY AND EMISSIONS 6E1-115
Fuel System Electrical Test (Cont'd)
Step Action Value(s) Yes No
7
Locate and repair open in the fuel pump relay ground
circuit. Is the action complete?
-
Verify repair
-
8
Check for short or open between the ECM and the fuel
pump relay.
Was a problem found?
-
Verify repair Go to Step 9
9
1. Check the fuel pump relay circuit for a poor terminal
connection at the ECM.
2. If a problem is found, replace terminal as necessary.
Was a problem found?
-
Verify repair Go to Step 10
10
Replace the EPROM or ECM.
Is the action complete? Note) Refer to 6E1-243.
-
Verify repair
-
11
1. Reconnect the fuel pump relay.
2. Disconnect the fuel pump electrical connector at the
fuel tank
3. Using a test light connected to ground, probe the fuel
pump feed wire (harness side).
4. Command the fuel pump ON with a scan tool.
Did the light illuminate for 2 seconds?
-
Go to Step 14 Go to Step 12
12
1. Honk the horn to verify that the horn relay is
functioning.
2. Substitute the horn relay for the fuel pump relay.
3. Leave the test light connected as in step 12.
4. Command the fuel pump ON with the scan tool.
Did the test light illuminate for 2 seconds when the fuel
pump was commanded ON?
-
Go to Step 16 Go to Step 13
13
1. Re-connect the horn relay in its proper location.
2. Check for a short circuit, blown fuse or open circuit
between the relay and the fuel tank.
Is the action complete?
-
Verify repair
-
14
1. With the fuel pump electrical connector at the fuel tank
disconnected, connect a test light between the feed
wire and the ground wire (harness side).
2. Command the fuel pump ON with a scan tool.
Did the test light illuminate for 2 seconds?
-
Go to Step 17 Go to Step 15
15
Repair the open circuit in the fuel pump ground wire.
Is the action complete?
-
Verify repair
-
16
1. Re-connect the horn relay in its proper location.
2. Replace the fuel pump relay.
Is the action complete?
-
Verify repair
-
17
Replace the fuel pump.
Is the action complete?
-
Verify repair
-
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