Jaguar X-Type Sedan and Estate (Wagon). Manual - part 334

1
2

1
2
3

Is the voltage greater than 1 volt?
Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system
for normal operation.

INSTALL a new MAF sensor.
REFER to:

Mass Air Flow (MAF) Sensor

(303-14A Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, Removal and Installation).
CLEAR the DTCs. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ECM.
REFER to:

Engine Control Module (ECM)

(303-14A Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, Removal and Installation).
Before replacing an ECM, contact dealer technical support.

PINPOINT TEST O : DTC P0051, P0052. LEFT-HAND BANK H02S HEATER

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

O1: CHECK THE POWER SUPPLY CIRCUIT TO THE LEFT-HAND BANK HO2S HEATER

Turn the ignition switch to the ON position.
Measure the voltage between the HO2S electrical connector EN32 pin 2 (WR) and GROUND.

Is the voltage less than 10 volts?
Yes

GO to O4

GO to O2

O2: CHECK THE GROUND CIRCUIT TO THE LEFT-HAND BANK HO2S HEATER

Turn the ignition switch to the OFF position.
Disconnect the ECM electrical connector EN16.
Measure the resistance between the HO2S electrical connector EN32 pin 1 (GO) and the ECM electrical connector
EN16 pins 55 and 56 (GO).

Is the resistance of each wire less than 5 ohms?
Yes

GO to O3

REPAIR the circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for
normal operation.

O3: CHECK THE LEFT-HAND BANK HO2S CIRCUIT FOR SHORT TO GROUND

Measure the resistance between the HO2S electrical connector EN32 pin 1 (GO) and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR the short to ground. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the
system for normal operation.

INSTALL a new left-hand bank HO2S. For additional information,
REFER to:

Heated Oxygen Sensor (HO2S) LH

(303-14A Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, Removal and Installation).
CLEAR DTCs. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ECM. For additional
information,
REFER to:

Engine Control Module (ECM)

(303-14A Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, Removal and Installation).
Before replacing an ECM, contact dealer technical support.

O4: CHECK FUSE 42 OF THE ENGINE COMPARTMENT FUSE BOX

Check the fuse.

Is the fuse OK?
Yes

GO to O6

GO to O5

O5: CHECK FUSE 42 OF THE ENGINE COMPARTMENT FUSE BOX FOR A SHORT TO GROUND

Measure the resistance between electrical connector JB34 pin 105 of the engine compartment fuse box and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR short to ground between the engine compartment fuse box and the left-hand bank HO2S. For additional
information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

INSTALL a new fuse. Check the circuit for cause of fuse failure. CLEAR the DTC. TEST the system for normal
operation.

O6: CHECK THE POWER SUPPLY TO FUSE 42 IN THE ENGINE COMPARTMENT FUSE BOX

Measure the voltage between fuse 42, electrical connector JB34 pin 105 and GROUND.

Is the voltage less than 10 volts?
Yes

Repair the circuit from the ECM control relay to the engine compartment fuse box. For additional information, refer to
wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

Repair the circuit between the engine compartment fuse box and the HO2S. For additional information, refer to wiring
diagrams. CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST P : DTC P1606. ECM RELAY.

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

P1: CHECK THE ECM CONTROL RELAY

Turn the ignition switch to the ON position.

Does the ECM relay make an audible click?
Yes

GO to P2

GO to P6

P2: CHECK FOR POWER SUPPLY FROM THE ECM CONTROL RELAY

Measure the voltage between the ECM control relay JB34 pin 131 and GROUND.

1
2
3

1
2

Is the voltage less than 10 volts?
Yes

GO to P3

REPAIR the circuit from the ECM control relay to the ECM. For additional information, refer to wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.

P3: CHECK FUSE 9 IN THE ENGINE COMPARTMENT FUSE BOX

Check the fuse.

Is the fuse OK?
Yes

GO to P4

INSTALL a new fuse. Check the circuit for cause of fuse failure. CLEAR the DTC. TEST the system for normal
operation.

P4: CHECK THE POWER SUPPLY TO FUSE 9 IN THE ENGINE COMPARTMENT FUSE BOX

Measure the voltage between Fuse 9 electrical connector JB34 pin 75 and GROUND.

Is the voltage less than 10 volts?
Yes

Repair the circuit from the battery positive to the engine compartment fuse box. CLEAR the DTC. TEST the system for
normal operation.

GO to P5

P5: CHECK THE POWER SUPPLY FROM FUSE 9 IN THE ENGINE COMPARTMENT FUSE BOX TO THE ECM CONTROL RELAY

Measure the voltage between the ECM control relay electrical connector JB34 pin 132 and GROUND.

Is the voltage less than 10 volts?
Yes

Repair the circuit from the engine compartment fuse box to the ECM control relay. CLEAR the DTC. TEST the system
for normal operation.

INSTALL a new ECM control relay. For additional information, refer to the electrical guide. CLEAR the DTC. TEST the
system for normal operation.

P6: CHECK FUSE 31 OF THE ENGINE COMPARTMENT FUSE BOX

Check the fuse.

Is the fuse OK?
Yes

GO to P7

GO to P10

P7: CHECK POWER SUPPLY TO THE ECM CONTROL RELAY FROM FUSE 31 OF THE ENGINE COMPARTMENT FUSE BOX

Measure the voltage between ECM relay electrical connector JB34 pin 133 and GROUND.

Is the voltage less than 10 volts?
Yes

GO to P8

GO to P12

P8: CHECK CONTINUITY OF THE ECM CONTROL RELAY GROUND CIRCUIT

Disconnect the ECM electrical connector EN16.
Remove the ECM control relay from the engine compartment fuse box.
Measure the resistance between the ECM electrical connector EN16 pin 40 and JB34 pin 134 of the engine
compartment fuse box.

Is the resistance less than 5 ohms?
Yes

GO to P9

REPAIR the circuit. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal
operation.

(This circuit includes the pow er distribution fuse box and the EMS relay and diode.)

P9: CHECK CONTINUITY OF THE ECM CONTROL RELAY WINDING

Measure the resistance of the ECM control relay winding between pins 1 and 2 of the ECM control relay.

Is the resistance less than 60 ohms?
Yes

INSTALL a new ECM control relay. CLEAR the DTC. TEST the system for normal operation.

INSTALL a new ECM.
REFER to:

Engine Control Module (ECM)

(303-14A Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, Removal and Installation).
Before replacing an ECM, contact dealer technical support. CLEAR the DTC. TEST the system for normal operation.

P10: CHECK FUSE 31 OF THE ENGINE COMPARTMENT FUSE BOX FOR A SHORT TO GROUND

Measure the resistance between electrical connector JB34 pin 83 of the engine compartment fuse box and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR short to GROUND between the engine compartment fuse box and the ECM control relay. CLEAR the DTC. TEST
the system for normal operation.

INSTALL a new fuse. CLEAR the DTC. TEST the system for normal operation.

P11: CHECK FUSE 9 OF THE ENGINE COMPARTMENT FUSE BOX FOR A SHORT TO GROUND

Measure the resistance between electrical connector JB34 pin 132 of the engine compartment fuse box and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR short to ground between the engine compartment fuse box and the ECM control relay. CLEAR the DTC. TEST
the system for normal operation.

INSTALL a new fuse. CLEAR the DTC. TEST the system for normal operation.

P12: CHECK THE ECM CONTROL RELAY DIODE

Remove the ECM control relay diode from the engine compartment fuse box.
Measure the continuity of ECM control relay diode.

1
2

1
2
3
4

1
2
3

1
2

Is the resistance less than 5 ohms?
Yes

Possible intermittent fault. Recheck DTCs.

INSTALL a new ECM control relay diode. Make sure that the ECM control relay diode is installed correctly. For
additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST Q : P0106, P0107, P0108. MAP SENSOR

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

Q1: CHECK THE GROUND CIRCUIT TO THE MAP SENSOR

Disconnect the MAP sensor electrical connecter EN8.
Measure the resistance between the MAP sensor electrical connecter EN8 pin 4 (BG) and GROUND.

Reconnect electrical connectors following test.

Is the resistance less than 5 ohms?
Yes

GO to Q2

REPAIR the circuit between the MAP sensor and GROUND. For additional information, refer to wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.

Q2: CHECK THE POWER SUPPLY CIRCUIT TO THE MAP SENSOR FOR SHORT TO BATTERY

Turn the ignition switch to the ON position.
Measure the voltage between the MAP sensor electrical connector EN8 pin 2 (OY) and GROUND.

Is the voltage greater than 6 volts?
Yes

REPAIR the short to battery. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for
normal operation.

GO to Q3

Q3: CHECK THE POWER SUPPLY CIRCUIT TO THE MAP SENSOR FOR SHORT TO GROUND

Turn the ignition switch to the ON position.
Measure the voltage between the MAP sensor electrical connector EN8 pin 2 (OY) and GROUND.

Is the voltage less than 4 volts?
Yes

REPAIR the short to GROUND. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system
for normal operation.

GO to Q4

Q4: CHECK CONTINUITY OF THE MAP SENSOR SIGNAL WIRE

Turn the ignition switch to the OFF position.
Disconnect the MAP sensor electrical connector EN8.
Disconnect the ECM electrical connector EN16.
Measure the resistance of the circuit between MAP sensor electrical connector EN8 pin 1 (BW ) and ECM electrical
connector EN16 pin 127 (BW).

Is the resistance less than 5 ohms?
Yes

GO to Q5

REPAIR the circuit between the MAP sensor electrical connector EN8 pin 1 (BW ) and ECM electrical connector EN16 pin
127 (BW ). For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal
operation.

Q5: CHECK THE MAP SENSOR SIGNAL WIRE FOR SHORT TO GROUND

Disconnect the ECM electrical connector EN16.
Disconnect the MAP sensor electrical connector EN8.
Measure the resistance between EN8 pin 1 (BW ) and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR the short to GROUND. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the
system for normal operation.

(The fault could be in any of the components or sensors in the 5 volt supply circuit, or the ECM.)

GO to Q6

Q6: CHECK THE MAP SENSOR SIGNAL WIRE FOR SHORT TO BATTERY

Connect the ECM electrical connector EN16.
Turn the ignition switch to the ON position.
Check for a voltage at EN8 pin 1 (BW).

Is the voltage greater than 10 volts?
Yes

Repair the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for
normal operation.

(The fault could be in any of the components or sensors in the 5 volt supply circuit, or the ECM.)

INSTALL a new MAP sensor. CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST R : P0010, P1384. VVT RIGHT-HAND BANK

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

R1: CHECK THE GROUND CIRCUIT TO THE RIGHT-HAND BANK VVT SOLENOID

Disconnect the VVT solenoid electrical connector EN61.
Measure the resistance between the VVT solenoid electrical connector EN61 pin 2 (BG) and GROUND.

1
2

Is the resistance less than 5 ohms?
Yes

GO to R2

REPAIR the circuit between VVT solenoid electrical connector EN61 pin 2 (BG) and GROUND. For additional
information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

R2: CHECK CONTINUITY OF THE RIGHT-HAND BANK VVT SOLENOID SIGNAL WIRE

Measure the resistance between VVT solenoid electrical connector EN61 pin 1 (RW ) and ECM electrical connector EN16
pin 109 (RW).

Is the resistance less than 5 ohms?
Yes

GO to R3

REPAIR the circuit between VVT solenoid electrical connector EN61 pin 1 (RW) and ECM electrical connector EN16 pin
109 (RW ). For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

R3: CHECK FOR SHORT TO GROUND AT THE RIGHT-HAND BANK VVT SOLENOID SIGNAL WIRE

Disconnect the ECM electrical connector EN16.
Measure the resistance between EN61 pin 1 (RW ) and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR the short to GROUND. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system
for normal operation.

GO to R4

R4: CHECK FOR SHORT TO BATTERY AT THE RIGHT-HAND BANK VVT SOLENOID SIGNAL WIRE

TURN the ignition switch to the ON position.
Check for a voltage at EN61 pin 1 (RW).

Is the voltage greater than 1 volt?
Yes

REPAIR the short circuit. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for
normal operation.

INSTALL a new right-hand bank VVT solenoid.
REFER to:

Variable Camshaft Timing (VCT) Oil Control Solenoid

(303-14A Electronic Engine Controls - 2.0L NA V6 -

AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Removal and Installation).
CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST S : P0020, P1396. VVT LEFT-HAND BANK

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

S1: CHECK GROUND CIRCUIT TO THE LEFT-HAND BANK VVT SOLENOID

Disconnect the VVT solenoid electrical connector, EN42.
Measure the resistance between the VVT solenoid electrical connector EN42 pin 2 (BG) and GROUND.

Is the resistance less than 5 ohms?
Yes

GO to S2

REPAIR the circuit between VVT solenoid electrical connector EN42 pin 2 (BG) and GROUND. For additional
information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

S2: CHECK CONTINUITY OF THE LEFT-HAND BANK VVT SOLENOID SIGNAL WIRE.

Measure the resistance between VVT solenoid electrical connector EN42 pin 1 (G) and ECM electrical connector EN16
pin 110 (G).

Is the resistance less than 5 ohms?
Yes

GO to S3

REPAIR the circuit between VVT solenoid electrical connector EN42 pin 1 (G) and ECM electrical connector EN16 pin
110 (G). For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal
operation.

S3: CHECK FOR SHORT TO GROUND AT THE LEFT-HAND BANK VVT SOLENOID SIGNAL WIRE

Disconnect the ECM electrical connector EN16.
Measure the resistance between EN61 pin 1 (RW ) and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR the short to GROUND. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the
system for normal operation.

GO to S4

S4: CHECK FOR SHORT TO BATTERY AT THE LEFT-HAND BANK VVT SOLENOID SIGNAL WIRE

TURN the ignition switch to the ON position.
Check for a voltage at EN61 pin 1 (RW).

Is the voltage greater than 1 volt?
Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for
normal operation.

INSTALL a new left-hand bank VVT solenoid.
REFER to:

Variable Camshaft Timing (VCT) Oil Control Solenoid

(303-14A Electronic Engine Controls - 2.0L NA V6 -

AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Removal and Installation).
CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST T : P1251, P1631, P1657, P1658. THROTTLE MOTOR RELAY

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

T1: CHECK THE POWER SUPPLY CIRCUIT TO THE THROTTLE MOTOR RELAY

Turn the ignition switch to the ON position.
Measure the voltage between pin 1 of the throttle motor relay base and GROUND.

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