Jaguar XJ (X350). Manual — part 906

P1656

TP sensor amplifier circuit

malfunction

ECM failure

Contact dealer technical support

for advice on possible ECM

failure.

P1657

Throttle motor relay coil

drive circuit ON failure

Throttle motor relay failure

Throttle motor relay coil to

ECM drive circuit; short
circuit to B+ voltage

For throttle motor relay tests,

GO to Pinpoint Test

G258127p36.

P1658

Throttle motor relay ON

failure

Throttle motor relay failure

Throttle motor relay coil to

ECM drive circuit; short
circuit to B+ voltage

For throttle motor relay tests,

GO to Pinpoint Test

G258127p36.

P1696

CAN ECM/ASCCM

network malfunction

CAN open circuit fault -

ASCCM to ECM

CAN short circuit fault

ASCCM failure

ECM failure

For CAN tests,

Communications Network

Contact dealer technical support

for advice on possible ECM

failure.

P1697

Adaptive speed control

HEADWAY switch(es)

circuit malfunction

Speed control switches

internal steering wheel
circuit; short circuit to
ground

Steering wheel cassette

reel; short circuit to
ground

Cassette reel to ECM circuit;

short circuit to ground

HEADWAY +/ - switch(es)

failure (stuck ON)

For speed control system,

Speed Control - VIN Range:

G00442->G45703

P1699

CAN ECM/A/CCM

network malfunction

CAN open circuit fault -

A/CCM to ECM

CAN short circuit fault

A/CCM failure

ECM failure

For CAN tests,

Communications Network

Contact dealer technical support

for advice on possible ECM

failure.

P1774

CAN TCM/J-Gate module

network malfunction

CAN open circuit fault - TCM

to J-Gate module

For CAN tests,

Communications Network For J-

Gate module,

CAN short circuit fault

J-Gate module failure

External Controls

P1783

Transmission over-

temperature shut-down

Transmission fluid level low

Transmission fluid cooler

circuit;
obstructed/leaking

Transmission fluid cooler

fins blocked by debris

Transmission mechanical

failure

For transmission information,

P1794

TCM ignition switched

power supply circuit

malfunction

Ignition switched power

supply fuse failure

Ignition switched power

supply circuit; short
circuit to ground, open
circuit

For transmission tests,

P1796 CAN network fault

CAN open circuit or short

circuit fault

TCM/Control valve failure

For CAN tests,

Communications Network For

transmission tests,

P1797

CAN TCM/ECM network

malfunction

CAN open circuit fault - TCM

to ECM

CAN short circuit fault

ECM failure

TCM/Control valve failure

For CAN tests,

Communications Network For

transmission tests,

Contact dealer technical support

for advice on possible ECM

failure

P1798

CAN TCM/IC network

malfunction

CAN open circuit fault - TCM

to IC

CAN short circuit fault

IC failure

TCM/Control valve failure

For CAN tests,

Communications Network For

transmission tests,

Contact dealer technical support

for advice on possible ECM

failure

P1799

CAN TCM/DSCCM

network malfunction

CAN open circuit fault - TCM

to DSCCM

CAN short circuit fault

For CAN tests,

Communications Network For

transmission tests,

www.

DSCCM failure

TCM/Control valve failure

Pinpoint Tests

PINPOINT TEST G258127p1 : DTC
P0101, P0102, P0103; MASS AIR FLOW
(MAF) SENSOR CIRCUIT
RANGE/PERFORMANCE, HIGH/LOW
VOLTAGE

G258127t1 : CHECK THE MAF SENSOR SENSING CIRCUIT FOR HIGH
RESISTANCE

1. Disconnect the battery negative terminal. 2. Disconnect the ECM electrical connector, PI01. 3.

Disconnect the MAF sensor electrical connector, PI14. 4. Measure the resistance between PI01, pin

44 (GW) and PI14, pin 03 (GW).

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

GO to Pinpoint Test G258127t2.

G258127t2 : CHECK THE MAF SENSOR SENSING CIRCUIT FOR SHORT TO
HIGH VOLTAGE

1. Reconnect the battery negative terminal. 2. Turn the ignition switch to the ON position. 3.

Measure the voltage between the MAF sensor electrical connector, PI14, pin 03 (GW) and GROUND.

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short circuit to high voltage. For additional information, refer to the wiring diagrams.

CLEAR the DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G258127t3.

G258127t3 : CHECK THE MAF SENSOR SENSING CIRCUIT FOR SHORT TO
GROUND

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between PI14, pin 03 (GW)

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

-> No

GO to Pinpoint Test G258127t4.

G258127t4 : CHECK THE MAF SENSOR SUPPLY CIRCUIT VOLTAGE

1. Reconnect the ECM electrical connector, PI01. 2. Turn the ignition switch to the ON position. 3.

Measure the voltage between the MAF sensor electrical connector, PI14, pin 01 (GU) and GROUND.

Is the voltage greater than 10 volts?

-> Yes

INSTALL a new MAF sensor.

Mass Air Flow (MAF) Sensor (18.30.15) CLEAR the DTC. TEST the system for normal operation.

-> No

REPAIR the circuit between the MAF sensor electrical connector, PI14, pin 01 (GU) and BATTERY. This

circuit includes the EMS control relay, fuse 14 of the front power distribution box, and the high

power protection module. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

PINPOINT TEST G258127p2 : DTC
P0111, P0112, P0113; INTAKE AIR
TEMPERATURE (IAT) SENSOR
CIRCUIT RANGE/PERFORMANCE,
HIGH/LOW VOLTAGE

www.