Infiniti QX56 (Z62). Manual - part 233

CHG

L TERMINAL CIRCUIT (OPEN)

CHG-21

< DTC/CIRCUIT DIAGNOSIS >

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1.

Connect the battery cable to the negative terminal.

2.

Check voltage between combination meter harness connector and ground.

Is the inspection result normal?

YES

>> Replace combination meter.

NO

>> Inspect the power supply circuit. Refer to 

PG-89, "Wiring Diagram - IGNITION POWER SUPPLY -

"

.

(+)

(–)

Condition

Voltage

Combination meter

Connector

Terminal

M34

2

Ground

Ignition switch ON

Battery voltage

CHG-22

< DTC/CIRCUIT DIAGNOSIS >

L TERMINAL CIRCUIT (SHORT)

L TERMINAL CIRCUIT (SHORT)

Description

INFOID:0000000006274872

The “L” terminal circuit controls the charge warning lamp. The charge warning lamp illuminates when the igni-
tion switch is set to ON or START. When the alternator is providing sufficient voltage with the engine running,
the charge warning lamp will go off. If the charge warning lamp illuminates with the engine running, a malfunc-
tion is indicated.

Diagnosis Procedure

INFOID:0000000006274873

1.

CHECK “L” TERMINAL CIRCUIT (SHORT)

1.

Turn ignition switch OFF.

2.

Disconnect alternator connector.

3.

Turn ignition switch ON.

Does charge warning lamp illuminate?

YES

>> GO TO 2.

NO

>> Refer to 

CHG-13, "Work Flow"

.

2.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect combination meter connector.

4.

Check continuity between combination meter harness connector and ground.

Is the inspection result normal?

YES

>> Replace combination meter.

NO

>> Repair the harness or connector.

Combination meter

Ground

Continuity

Connector

Terminal

M34

25

Not existed

CHG

S TERMINAL CIRCUIT

CHG-23

< DTC/CIRCUIT DIAGNOSIS >

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S TERMINAL CIRCUIT

Description

INFOID:0000000006274874

The output voltage of the alternator is controlled by the IC voltage regulator at the “S” terminal detecting the
input voltage.
The “S” terminal circuit detects the battery voltage to adjust the alternator output voltage with the IC voltage
regulator.

Diagnosis Procedure

INFOID:0000000006274875

1.

CHECK “S” TERMINAL CONNECTION

1.

Turn ignition switch OFF.

2.

Check if “S” terminal is clean and tight.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair “S” terminal connection. Confirm repair by performing complete Starting/Charging system

test. Refer to Technical Service Bulletin.

2.

CHECK “S” TERMINAL CIRCUIT

Check voltage between alternator harness connector and ground.

Is the inspection result normal?

YES

>> Refer to 

CHG-13, "Work Flow"

.

NO

>> Check harness for open between alternator and fuse.

(+)

(–)

Voltage

Alternator

Connector

Terminal

E205

4

Ground

Battery voltage

CHG-24

< SYMPTOM DIAGNOSIS >

CHARGING SYSTEM

SYMPTOM DIAGNOSIS

CHARGING SYSTEM

Symptom Table

INFOID:0000000006274876

Symptom

Reference

Discharged battery

Refer to 

CHG-13, "Work Flow"

.

The charge warning lamp does not illuminate when the ignition 
switch is set to ON.

The charge warning lamp does not turn OFF after the engine 
starts.

The charging warning lamp turns ON when increasing the engine 
speed.