Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2009 Jaguar XJ8 LFACTORY OEM SERVICE PROCEDURE
Acceleration Control (2003.5-09)
- Specification
- Description and Operation
- Diagnosis and Testing
- Acceleration Control
- Notes
- PINPOINT TEST G240070p1 : DTC P1240, P1241, P1242
- PINPOINT TEST G240070p2 : DTC P1122, P1123, P1215, P1216, P1344
- PINPOINT TEST G240070p3 : DTC P0121, P0122, P0123
- G240070t8 : CHECK THE POWER SUPPLY TO THE THROTTLE POSITION SENSOR
- G240070t9 : CHECK THE THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
- G240070t10 : CHECK THE THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT FOR A SHORT TO GROUND
- G240070t11 : CHECK THE THROTTLE POSITION SENSOR GROUND CIRCUIT
- G240070t12 : CHECK THE THROTTLE POSITION SENSOR GROUND WIRE FOR OPEN CIRCUIT
- G240070t13 : CHECK THE THROTTLE POSITION SENSOR
- G240070t14 : CHECK CONTINUITY OF THE THROTTLE POSITION SENSOR OUTPUT CIRCUIT
- G240070t15 : CHECK THE THROTTLE POSITION SENSOR OUTPUT CIRCUIT FOR A SHORT TO GROUND
- PINPOINT TEST G240070p4 : DTC P1251, P1658, P1631, P1657
- G240070t16 : CHECK THE THROTTLE MOTOR RELAY
- G240070t17 : CHECK THE ECM POWER SUPPLY FROM THE THROTTLE MOTOR RELAY
- G240070t18 : CHECK CONTINUITY OF THE ECM POWER SUPPLY WIRE FROM THE THROTTLE MOTOR RELAY
- G240070t19 : CHECK FUSE 18 IN THE FRONT POWER DISTRIBUTION BOX (FPDB)
- G240070t20 : CHECK THE THROTTLE MOTOR RELAY POWER SUPPLY CIRCUIT
- G240070t21 : CHECK FUSE 18 FOR A SHORT TO GROUND
- G240070t22 : CHECK THE POWER SUPPLY CIRCUIT TO THE THROTTLE MOTOR RELAY COIL
- G240070t23 : CHECK CONTINUITY OF THE THROTTLE MOTOR RELAY COIL
- G240070t24 : CHECK CONTINUITY OF THE THROTTLE MOTOR RELAY GROUND CIRCUIT
- PINPOINT TEST G240070p5 : DTC P1243
- Acceleration Control
- Removal and Installation
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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