Infiniti QX56 (JA60). Manual - part 437

 

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Infiniti QX56 (JA60). Manual - part 437

 

 

EC-400

< COMPONENT DIAGNOSIS >

[VK56DE]

FUEL PUMP

4. Check voltage between ECM terminal 113 and ground with

CONSULT-III or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 3.

3.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II

Check voltage between IPDM E/R terminal 46 and ground with

CONSULT-III or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 13.

4.

DETECT MALFUNCTIONING PART

Check harness for open or short between IPDM E/R and ECM.

>> Repair harness or connectors.

5.

CHECK CONDENSER-2 POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Reconnect all harness connectors disconnected.

3. Disconnect condenser-2 harness connector.

4. Turn ignition switch ON.

5. Check voltage between condenser-2 terminal 1 and ground with

CONSULT-III or tester. 

6. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 8.

NG

>> GO TO 6.

6.

CHECK 15 A FUSE

1. Turn ignition switch OFF.

Voltage: Battery voltage 

PBIB1187E

Voltage: Battery voltage

PBIB2656E

BBIA0388E

Voltage:

Battery voltage should exist for 1 sec-
ond after ignition switch is turned ON.

PBIB0624E

FUEL PUMP

EC-401

< COMPONENT DIAGNOSIS >

[VK56DE]

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EC

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2. Disconnect 15 A fuse.

3. Check 15 A fuse (No. 48).
OK or NG

OK

>> GO TO 7.

NG

>> Replace fuse.

7.

CHECK CONDENSER-2 POWER SUPPLY CIRCUIT-II FOR OPEN AND SHORT

1. Disconnect IPDM E/R harness connector E119.

2. Check harness continuity between IPDM E/R terminal 13 and condenser-2 terminal 1.

Refer to Wiring Diagram. 

3. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 13.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

8.

CHECK CONDENSER-2 GROUND CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between condenser-2 terminal 2 and ground.

Refer to Wiring Diagram.

2. Also check harness for short to power.
OK or NG

OK

>> GO TO 9.

NG

>> Repair open circuit or short to power in harness or connectors.

9.

CHECK CONDENSER-2

Refer to 

EC-402, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

NG

>> Replace condenser-2.

10.

CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect “fuel level sensor unit and fuel pump” harness con-

nector.

3. Disconnect IPDM E/R harness connector E119.

4. Check harness continuity between IPDM E/R terminal 13 and

“fuel level sensor unit and fuel pump” terminal 1, “fuel level sen-

sor unit and fuel pump” terminal 3 and ground.

Refer to Wiring Diagram. 

5. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 12.

NG

>> GO TO 11.

11.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E41, C1

• Harness for open or short between fuel pump and IPDM E/R

• Harness for open or short between fuel pump and ground

>> Repair open circuit or short to ground or short to power in harness or connectors.

Continuity should exist.

Continuity should exist.

Continuity should exist.

BBIA0583E

EC-402

< COMPONENT DIAGNOSIS >

[VK56DE]

FUEL PUMP

12.

CHECK FUEL PUMP

Refer to 

EC-402, "Component Inspection"

.

OK or NG

OK

>> GO TO 13.

NG

>> Replace “fuel level sensor unit and fuel pump”.

13.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-35, "How to Check Terminal"

 and 

GI-38, "Intermittent Incident"

.

OK or NG

OK

>> Replace IPDM E/R.

NG

>> Repair or replace harness or connectors.

Component Inspection

INFOID:0000000005149478

FUEL PUMP

1. Disconnect “fuel level sensor unit and fuel pump” harness connector.
2. Check resistance between fuel level sensor unit and fuel pump

terminals 1 and 3.

CONDENSER-2

1. Turn ignition switch OFF.

2. Disconnect condenser-2 harness connector.

3. Check resistance between condenser-2 terminals as 1 and 2.

Resistance: 0.2 - 5.0 

 [at 25°C (77°F)]

SEC918C

Resistance

Above 1 M

Ω at 25°C (77°F)

PBIB0794E

ICC BRAKE SWITCH

EC-403

< COMPONENT DIAGNOSIS >

[VK56DE]

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ICC BRAKE SWITCH

Component Description

INFOID:0000000005149479

When depress on the brake pedal, ICC brake switch is turned OFF

and stop lamp switch is turned ON. ECM detects the state of the

brake pedal by this input of two kinds (ON/OFF signal)

Refer to 

CCS-13

 for the ICC function.

Diagnosis Procedure

INFOID:0000000005175590

1.

CHECK OVERALL FUNCTION-I

 With CONSULT-III

1. Turn ignition switch ON.

2. Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.

3. Check “BRAKE SW1” indication under the following conditions.

 Without CONSULT-III

1. Turn ignition switch ON.

2. Check voltage between ECM terminal 108 and ground under the

following conditions.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 2.

2.

CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT-I

1. Turn ignition switch OFF.

2. Disconnect ICC brake switch harness connector.

3. Turn ignition switch ON.

BBIA0470E

CONDITION

INDICATION

Brake pedal: Slightly depressed

OFF

Brake pedal: Fully released

ON

CONDITION

VOLTAGE

Brake pedal: Slightly depressed

Approximately 0V

Brake pedal: Fully released

Battery voltage

MBIB0061E

BBIA0470E

 

 

 

 

 

 

 

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