• | Verify that the fuel level is in the same range as the customer concern. |
• | For intermittent diagnosis, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
• | Refer to Fuel Level Specifications in order to verify the correct readings for the fuel level sensor. The Fuel Level Sensor voltage parameter is available on the scan tool in the PCM EVAP data list. |
The numbers below refer to the step numbers on the diagnostic table.
This step tests for a high resistance in the signal circuit and the low reference circuit of the fuel level sensor.
DTCs will set in the PCM when you perform this diagnostic table.
Step | Action | Value(s) | Yes | No | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics | ||||||||||||
1 | Did you perform the Instrument Cluster Diagnostic System Check? | -- | Go to Step 2 | |||||||||
2 |
Important: Verify the J 33431-C resistance settings with a DMM. Does the fuel gage display the correct level? | -- | Go to Step 4 | Go to Step 3 | ||||||||
Important: Verify the J 33431-C resistance settings with a DMM. Important: Turn OFF the ignition momentarily between the resistance settings in order to quickly update the scan tool display. Does the scan tool display the correct fuel level voltage? | -- | Go to Step 11 | Go to Step 5 | |||||||||
4 | Inspect for the following items:
Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 7 | ||||||||
5 | Test the signal circuit of the fuel level sensor for a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 6 | ||||||||
6 | Test the low reference circuit of the fuel level sensor for a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 9 | ||||||||
7 |
Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 8 | ||||||||
8 |
Does the resistance change smoothly across the specified range? | 40-250 ohms | Go to Diagnostic Aids | Go to Step 10 | ||||||||
9 | Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 12 | ||||||||
10 | Replace the fuel level sensor. Refer to Fuel Level Sensor Replacement in Engine Controls. Did you complete the replacement? | -- | Go to Step 13 | -- | ||||||||
11 | Replace the IPC. Refer to Instrument Cluster Replacement in Engine Controls. Did you complete the replacement? | -- | Go to Step 13 | -- | ||||||||
12 |
Important: Program the replacement PCM. Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls. Did you complete the replacement? | -- | Go to Step 13 | -- | ||||||||
Did you correct the condition? | -- | System OK | Go to Step 2 |