Fuel System - Diagnostic Procedures: Notes
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 Jaguar S-Type, 2007 Jaguar S-Type, 2006 Jaguar S-Type, 2005 Jaguar S-Type, and 2004 Jaguar S-Type. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern by operating the system.
- Visually inspect for obvious signs of mechanical or electrical damage.
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the concern is not visually evident, refer to the Symptom Chart.
Symptom Chart
| Condition | Possible Source | Action |
|---|---|---|
| P1233, P1235, -Fuel Pump Primary Circuit Failure | Damaged relay. Damaged harness. Connector loose or corroded. Connector pins(s) bent or tracking between connections. Damaged ground. 'Popped' inertia switch. |
GO to Pinpoint Test A. |
| B1201, P0460, -Fuel Sender Circuit Failure | Worn or damaged sensor tracks. Damaged Harness. Connector loose or corroded. Connector pin(s) bent or tracking between connections. Fuel level sensor to instrument cluster circuits intermittent short or open circuit or high resistance. Fuel level sensor failure. Instrument cluster fault (incorrect fuel level data). |
GO to Pinpoint Test B. |
Fuel Pump Harness Connector
| Pin Number | Circuit Function | Circuit Color |
|---|---|---|
| 1 | Right-hand fuel level sensor signal supply | White/red |
| 2 | Fuel pump voltage supply | Green/orange |
| 3 | Right-hand fuel level sensor voltage supply | Brown/red |
| 4 | Fuel pump GROUND supply | Brown/red |
Fuel Pump Diode Connector
| Pin Number | Circuit Function | Circuit Color |
|---|---|---|
| 1 | Fuel pump relay voltage supply | Red |
| 2 | Fuel pump diode voltage supply | Green/white |
Rear Electronic Module Harness Connector
| Pin Number | Circuit Function | Circuit Color |
|---|---|---|
| 1 | Voltage supply from the fuel pump relay | Green/orange |
| 2 | Rear electronic module GROUND supply | Brown |
| 11 | Fuel pump voltage supply | Green/orange |
| 12 | Fuel pump GROUND supply | Brown/red |
Left-hand Side Fuel Level Sensor Harness Connector
| Pin Number | Circuit Function | Circuit Color |
|---|---|---|
| 1 | Left-hand fuel level sensor voltage supply | Brown/blue |
| 3 | Left-hand fuel level sensor signal supply | White/blue |
Rear Electronic Module Harness Connector
| Pin Number | Circuit Function | Circuit Color |
|---|---|---|
| 23 | Fuel sensors voltage supply | Brown/red |