DRIVEABILITY AND EMISSIONS 6E1-93
Rough, Unstable, or incorrect Idle, Stalling Sympton (For Closed Loop System)
Step Action Value(s) Yes No
12
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 15 Go to Step 13
13
1. Honk the horn to verify that horn relay is functioning.
2. Susbstitute 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 17 Go to Step 14
14
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
-
15
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 18 Go to Step 16
16
Repair the open circuit in the fuel pump ground wire.
Is the action complete?
-
Verify repair
-
17
1. Re-connect the horn relay in its proper location.
2. Replace the fuel pump relay.
Is the action complete?
-
Verify repair
-
18
Replace the fuel pump.
Is the action complete?
-
Verify repair
-
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