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Home >> Jaguar >> 2008 >> X-Type (X400) V6-3.0L >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Pinpoint Tests >> PINPOINT TEST G457389p2

PINPOINT TEST G457389p2



Pinpoint Tests

CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00. Failure to follow this instruction may result in damage to the vehicle.

NOTE:
- This section contains references to Parameter Identifiers (PIDs). Where the Jaguar approved diagnostic system is not available, a scantool may be used to access these PIDs, all of which give information, and some of which can be used to both read information and to activate components. The format of the information may vary, depending on the tool used.
- When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to 3 decimal places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.
- Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
- If a DTC is detected, all DTCs must be cleared after the concern is repaired. Failure to clear all DTCs may cause driveability concerns.

PINPOINT TEST G457389p2 : AUXILIARY HEATER RELAY 2

G457389t15 : CHECK THE AUXILIARY HEATER 2 CONTROL LINE 'ON' STATE
1.







2.







3.







4. Key off.
5. Auxiliary heater connector disconnected.
6. Key on, engine off.
7. Scan tool connected.
8. Access the ECM and control the auxiliary heater relay 2 PID.
9. Activate the auxiliary heater 2.
10. Measure the voltage between:

Auxiliary heater connector, Vehicle battery
harness side
Auxiliary heater 2 control, Negative post
pins 03 and 05

- Is the voltage between 9 volts and 15 volts?

-> YES
GO to Pinpoint Test G457389t21.

-> NO
GO to Pinpoint Test G457389t16.

G457389t16 : CHECK THE AUXILIARY HEATER 2 CONTROL LINE FOR SHORT CIRCUIT TO GROUND
1. Key off.
2. Auxiliary heater 2 relay connector disconnected.
3. Key on, engine off.
4. Measure the resistance between:

Auxiliary heater connector, Vehicle battery
harness side
Auxiliary heater 2 control, Negative post
pins 03 and 05

- Is the resistance greater than 10 Ohms?

-> YES
GO to Pinpoint Test G457389t17.

-> NO
REPAIR the short circuit.

G457389t17 : CHECK THE AUXILIARY HEATER 2 CONTROL LINE FOR CONTINUITY
1. Measure the resistance between:

Auxiliary heater connector, Auxiliary heater 2 relay
harness side connector, harness side
Auxiliary heater 2 control, Auxiliary heater 2
pins 03 and 05 control, pin 05

- Is the resistance less than 10 Ohms?

-> YES
GO to Pinpoint Test G457389t18.

-> NO
REPAIR the open circuit.

G457389t18 : CHECK THE SUPPLIES TO THE AUXILIARY HEATER 2 RELAY
1. Key off.
2. Measure the voltage between:

Auxiliary heater 2 relay Vehicle battery
connector, harness side
Permanent 12 volt Negative post
supply, pin 03

3. Key on, engine off.
4. Measure the voltage between:

Auxiliary heater 2 relay Vehicle battery
connector, harness side
Ignition supply, pin 01 Negative post

- Are the voltages between 9 volts and 15 volts?

-> YES
GO to Pinpoint Test G457389t19.

-> NO
NO supply to the auxiliary heater 2 circuit.

G457389t19 : CHECK THE ECM CONTROL LINE 'ON' STATE
1. Scan tool connected.
2. Access the ECM and control the auxiliary heater relay 2 PID.
3. Activate the auxiliary heater 2.
4. Measure the resistance between:

Auxiliary heater 2 relay Vehicle battery
connector, harness side
Auxiliary heater relay 2 Negative post
control, pin 02

- Is the resistance less than 10 Ohms?

-> YES
SUSPECT: - Auxiliary heater 2 relay connector - Auxiliary heater 2 relay

-> NO
GO to Pinpoint Test G457389t20.

G457389t20 : CHECK THE ECM CONTROL LINE FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

Auxiliary heater 2 relay Vehicle battery
connector, harness side
Auxiliary heater relay 2 Positive post
control, pin 02

- Is the resistance greater than 10 Ohms?

-> YES
GO to Pinpoint Test G457389t26.

-> NO
GO to Pinpoint Test G457389t25.

G457389t21 : CHECK THE AUXILIARY HEATER 2 CONTROL LINE 'OFF' STATE
1. Scan tool connected.
2. Access the ECM and control the auxiliary heater heater relay 2 PID.
3. De-activate the auxiliary heater 2.
4. Measure the resistance between:

Auxiliary heater connector, Vehicle battery
harness side
Auxiliary heater 2 control, Positive post
pins 03 and 05

- Is the resistance greater than 10 Ohms?

-> YES
An intermittent fault may be present in the wiring harness. Visually check for chaffed wires or other physical damage to the harness. If no fault is found in the circuit, suspect the following component(s): - Auxiliary heater ground circuit - Auxiliary heater

-> NO
GO to Pinpoint Test G457389t22.

G457389t22 : CHECK THE AUXILIARY HEATER 2 CIRCUIT FOR SHORT CIRCUIT TO POWER IN THE HARNESS
1. Key off.
2. Auxiliary heater relay 2 connector disconnected.
3. Key on, engine off.
4. Measure the resistance between:

Auxiliary heater relay 2 Vehicle battery
connector, harness side
Auxiliary heater 2 control, Positive post
pin 05

- Is the resistance greater than 10 Ohms?

-> YES
GO to Pinpoint Test G457389t23.

-> NO
REPAIR the short circuit.

G457389t23 : CHECK THE ECM CONTROL LINE FOR SHORT CIRCUIT TO GROUND
1. Measure the resistance between:

Auxiliary heater relay 2 Vehicle battery
connector, harness side
Auxiliary heater 2 control, Negative post
pin 02

- Is the resistance greater than 10 Ohms?

-> YES
SUSPECT: - Auxiliary heater relay 2

-> NO
GO to Pinpoint Test G457389t24.

G457389t24 : CHECK WHETHER THE SHORT CIRCUIT TO GROUND IS IN THE ECM HARNESS OR THE MODULE
1. Key off.
2. ECM connector disconnected.
3. Key on, engine off.
4. Measure the resistance between:

Auxiliary heater relay 2 Vehicle battery
connector, harness side
Auxiliary heater 2 control, Negative post
pin 02

- Is the resistance greater than 10 Ohms?

-> YES
SUSPECT: - ECM

-> NO
REPAIR the short circuit.

G457389t25 : CHECK WHETHER THE SHORT CIRCUIT TO POWER IS IN THE ECM HARNESS OR THE MODULE
1. Key off.
2. ECM connector disconnected.
3. Key on, engine off.
4. Measure the resistance between:

Auxiliary heater relay 2 Vehicle battery
connector, harness side
Auxiliary heater 2 control, Positive post
pin 02

- Is the resistance greater than 10 Ohms?

-> YES
SUSPECT: - ECM

-> NO
REPAIR the short circuit.

G457389t26 : CHECK THE ECM CONTROL LINE FOR CONTINUITY
1. Key off.
2. ECM connector disconnected.
3. Measure the resistance between:

Auxiliary heater relay 2 ECM connector, harness side
connector, harness side
Auxiliary heater 2 control, Auxiliary heater 2 control,
pin 02 pin 62

- Is the resistance less than 10 Ohms?

-> YES
SUSPECT: - ECM connector - ECM

-> NO
REPAIR the open circuit.
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