Jaguar XJ (X350). Service manual — part 948
Is the voltage greater than 3 volts?
-> Yes
REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
-> No
GO to Pinpoint Test G531332t90.
G531332t90 : CHECK THE APP SENSOR SENSING CIRCUIT FOR SHORT
CIRCUIT TO GROUND
1. Key off. 2. Measure the resistance between:
APP sensor connector CR14, harness side
Battery
Pin 04
Negative terminal
Is the resistance less than 10,000 ohms?
-> Yes
REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
-> No
GO to Pinpoint Test G531332t91.
G531332t91 : CHECK THE APP SENSOR SUPPLY VOLTAGE AT THE SENSOR
1. Reconnect the ECM electrical connector, PI300. 2. Key on, engine off. 3. Measure the voltage
between:
APP sensor connector CR14, harness side
Battery
Pin 05
Negative terminal
Is the voltage less than 4 volts?
-> Yes
GO to Pinpoint Test G531332t92.
-> No
INSTALL a new APP sensor.
Accelerator Pedal (19.20.01) CLEAR the DTC. TEST the system for normal operation.
G531332t92 : CHECK THE APP SENSOR SUPPLY VOLTAGE CIRCUIT FOR
HIGH RESISTANCE
1. Key off. 2. Disconnect the ECM electrical connector, PI300. 3. Measure the resistance between:
APP sensor connector CR14, harness side ECM connector PI300, harness side
Pin 05
Pin 19
Is the resistance greater than 5 ohms?
-> Yes
REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
-> No
Check the ECM power supplies (recheck DTCs. P1104 may be flagged).
PINPOINT TEST G531332p24 :
THROTTLE MOTOR CONTROL
CIRCUIT MALFUNCTION
G531332t93 : CHECK THE THROTTLE MOTOR - TO ECM CIRCUIT FOR HIGH
RESISTANCE
1. Key off. 2. Disconnect the throttle motor electrical connector, PI26. 3. Disconnect the ECM
electrical connector, PI300. 4. Measure the resistance between:
Throttle motor connector PI26, harness side ECM connector PI300,harness side
Pin 02
Pin 74
Is the resistance greater than 5 ohms?
-> Yes
REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
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-> No
GO to Pinpoint Test G531332t94.
G531332t94 : CHECK THE THROTTLE MOTOR + TO ECM CIRCUIT FOR HIGH
RESISTANCE
1. Measure the resistance between:
Throttle motor connector PI26, harness side ECM connector PI300,harness side
Pin 01
Pin 75
Is the resistance greater than 5 ohms?
-> Yes
REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
-> No
INSTALL a new throttle body.
Throttle Body - 4.2L NA V8 - AJV8/3.5L NA V8 - AJV8, VIN Range: G45704->G99999 (19.70.04)
Throttle Body - 4.2L SC V8 - AJV8, VIN Range: G45704->G99999 (19.70.04) CLEAR the DTC. TEST the
system for normal operation.
PINPOINT TEST G531332p25 : SENSOR
SUPPLY VOLTAGE MALFUNCTION,
HIGH/LOW VOLTAGE
G531332t95 : CHECK THE SUPPLY VOLTAGE AT THE MANIFOLD ABSOLUTE
PRESSURE (MAP) SENSOR
1. Disconnect the MAP sensor electrical connector, PI301. 2. Key on, engine off. 3. Measure the
voltage between:
MAP sensor connector PI301, harness side
Battery
Pin 02
Negative terminal
Is the voltage less than 5 volts?
-> Yes
REPAIR the circuit between the MAP sensor and battery. This circuit includes splice PIS84. For
additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal
operation.
-> No
GO to Pinpoint Test G531332t96.
G531332t96 : CHECK THE SUPPLY VOLTAGE AT THE FUEL RAIL PRESSURE
(FRP) SENSOR
1. Disconnect the FRP sensor electrical connector, PI28. 2. Measure the resistance between:
FRP sensor connector PI28, harness side
Battery
Pin 01
Negative terminal
Is the voltage less than 5 volts?
-> Yes
REPAIR the circuit between the FRP sensor and battery. This circuit includes splice PIS84. For
additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal
operation.
-> No
CHECK for DTCs indicating a sensor fault. Refer to the DTC index.
PINPOINT TEST G531332p26 : SENSOR
GROUND CIRCUITS OPEN CIRCUIT
G531332t115 : CHECK THE SENSOR GROUND AT THE MANIFOLD ABSOLUTE
PRESSURE (MAP) SENSOR (VEHICLES WITH SUPERCHARGER)
1. Key off. 2. Disconnect the ECM electrical connector, PI300. 3. Disconnect the MAP sensor electrical
connector, PI301. 4. Measure the resistance between:
MAP sensor electrical connector PI301, harness side ECM connector PI300, harness side
Pin 04
Pin 12
Is the resistance greater than 5 ohms?
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