Jaguar XJ (X350). Manual — part 1233

G426404t8 : CHECK THE RH AIR MIX SERVO POSITION FEEDBACK CIRCUIT
FOR SHORT TO GROUND

1. Measure the resistance between the rear climate control module connector RA1, pin 03 and

GROUND.

•

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 G426404t6.

G426404t6 : CHECK THE RH AIR MIX SERVO POSITION FEEDBACK CIRCUIT
FOR SHORT TO B+

1. Reconnect the battery negative terminal.

Battery Connect (86.15.15) 2. Turn the ignition switch to the ON position. 3. Measure the voltage

between the rear climate control module connector RA1, pin 03 and GROUND.

•

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 G426404t9.

G426404t9 : CHECK THE LH AIR MIX SERVO POSITION FEEDBACK CIRCUIT
FOR SHORT TO B+

1. Measure the voltage between the rear climate control module connector RA1, pin 02 and

GROUND.

•

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

INSTALL a new air mix servo. CLEAR the DTC. TEST the system for normal operation. If the DTC is

repeated, INSTALL a new rear climate control module.

PINPOINT TEST G426404p3 : DTC
B2829: EVAPORATOR TEMPERATURE
SENSOR CIRCUIT TEST

G426404t10 : CHECK THE EVAPORATOR TEMPERATURE SENSOR CIRCUIT
FOR SHORT TO GROUND

1. Disconnect the battery negative terminal.

Battery Disconnect and Connect 2. Disconnect the rear climate control module connector RA1. 3.

Disconnect the evaporator temperature sensor connector RA10. 4. Measure the resistance between

the rear climate control module connector RA1, pin 09 and GROUND.

•

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

INSTALL a new evaporator temperature sensor. CLEAR the DTC. TEST the system for normal

operation. If the DTC is repeated, INSTALL a new rear climate control module.

PINPOINT TEST G426404p4 : DTC
B2828: EVAPORATOR TEMPERATURE
SENSOR CIRCUIT TEST

G426404t11 : CHECK THE EVAPORATOR TEMPERATURE SENSOR CIRCUIT
FOR OPEN CIRCUIT

1. Disconnect the battery negative terminal.

Battery Disconnect and Connect 2. Disconnect the rear climate control module connector RA1. 3.

Disconnect the evaporator temperature sensor connector RA10. 4. Measure the resistance between

the rear climate control module connector RA1, pin 09 and evaporator temperature sensor

connector RA10, pin 01.

•

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

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GO to Pinpoint Test G426404t13.

G426404t13 : CHECK THE EVAPORATOR TEMPERATURE SENSOR CIRCUIT
FOR SHORT TO B+

1. Reconnect the battery negative terminal.

Battery Connect (86.15.15) 2. Turn the ignition switch to the ON position. 3. Measure the voltage

between the rear climate control module connector RA1, pin 09 and GROUND.

•

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

INSTALL a new evaporator temperature sensor. CLEAR the DTC. TEST the system for normal

operation. If the DTC is repeated, INSTALL a new rear climate control module.

PINPOINT TEST G426404p5 : SERVO
POWER SUPPLY CIRCUIT TESTS

G426404t12 : CHECK THE SERVO POWER SUPPLY CIRCUIT FOR OPEN
CIRCUIT

1. Disconnect the battery negative terminal.

Battery Disconnect and Connect 2. Disconnect the rear climate control module connector RA1. 3.

Disconnect the mode servo connector RA09. 4. Measure the resistance between the rear climate

control module connector RA1, pin 11 and mode servo connector RA09, pin 03.

•

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit between the rear climate control module connector RA1, pin 11

and splice RAS10. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the

system for normal operation.

-> No

GO to Pinpoint Test G426404t14.

G426404t14 : CHECK THE SERVO POWER SUPPLY CIRCUIT FOR SHORT TO
GROUND

1. Disconnect the LH air mix servo connector RA7. 2. Disconnect the RH air mix servo connector RA8.

3. Measure the resistance between the rear climate control module connector RA1, pin 11 and

GROUND.

•

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit between the rear climate control connector RA1, pin 11, mode servo

connector RA09, pin 03, LH air mix servo connector RA7, pin 03 and RH air mix servo connector RA8,

pin 03. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for

normal operation.

-> No

GO to Pinpoint Test G426404t15.

G426404t15 : CHECK THE SERVO POWER SUPPLY CIRCUIT FOR SHORT TO
B+

1. Reconnect the battery negative terminal.

Battery Connect (86.15.15) 2. Turn the ignition switch to the ON position. 3. Measure the voltage

between the rear climate control module connector RA1, pin 11 and GROUND.

•

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short circuit between the rear climate control connector RA1, pin 11, mode servo

connector RA09, pin 03, LH air mix servo connector RA7, pin 03 and RH air mix servo connector RA8,

pin 03. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for

normal operation.

-> No

GO to Pinpoint Test G426404t16.

G426404t16 : CHECK THE MODE SERVO FOR SHORT TO B+

1. Reconnect the mode servo connector RA09. 2. Measure the voltage between the rear climate

control module connector RA1, pin 11 and GROUND.

•

Is the voltage greater than 3 volts?

-> Yes

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

-> No

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