Infiniti G37 Coupe. Manual — part 1314

ON BOARD DIAGNOSTIC (OBD) SYSTEM

TM-109

< FUNCTION DIAGNOSIS >

[5AT: RE5R05A]

longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the fol-
lowing priorities to update the data.

Both 1st trip freeze frame data and freeze frame data (along with the DTC) are cleared when the ECM mem-
ory is erased.

How to Erase DTC

The diagnostic trouble code can be erased by CONSULT-III, GST or ECM DIAGNOSTIC TEST MODE as
described following.
• If the battery cable is disconnected from the terminal, the DTC will be lost within 24 hours.
• When you erase the DTC, using CONSULT-III or GST is easier and quicker than switching the mode

selector on the ECM.

The following emission-related diagnostic information is cleared from the ECM memory when erasing DTC
related to OBD-II. For details, refer to

EC-552, "DTC Index"

• Diagnostic trouble codes (DTC)
• 1st trip diagnostic trouble codes (1st trip DTC)
• Freeze frame data
• 1st trip freeze frame data
• System readiness test (SRT) codes
• Test values

How to Erase DTC (With CONSULT-III)

The emission related diagnostic information in the TCM and ECM can be erased by selecting “All Erase”
in the “Description” of “FINAL CHECK” mode with CONSULT-III.

How to Erase DTC (With GST)

If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10
seconds and then turn it ON (engine stopped) again.

Perform “Erase Self-diagnosis”

TM-111, "Diagnosis Description"

Perform “How to Erase DTC (WITH GST)”. Refer to

EC-107, "Diagnosis Description"

How to Erase DTC (No tools)

If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10
seconds and then turn it ON (engine stopped) again.

Perform “Erase Self-diagnosis”

TM-111, "Diagnosis Description"

Perform “How to Erase DTC (No tools)”. Refer to

EC-107, "Diagnosis Description"

OBD-II SELF-DIAGNOSTIC PROCEDURE (WITH GST)

Refer to

EC-129, "Diagnosis Tool Function"

OBD-II SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)

Refer to “MALFUNCTION INDICATOR LAMP (MIL)”. Refer to

EC-107, "Diagnosis Description"

MALFUNCTION INDICATOR LAMP (MIL)

Description

Priority

Items

Freeze frame data

Misfire — DTC: P0300 - P0306
Fuel Injection System Function — DTC: P0171, P0172, P0174, P0175

Except the above items (Includes A/T related items)

1st trip freeze frame data

TM-110

< FUNCTION DIAGNOSIS >

[5AT: RE5R05A]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

• The MIL is located on the combination meters.

The MIL will light up when the ignition switch is turned ON with-
out the engine running. This is a bulb check. If the MIL does not
light up, refer to

EC-503, "Component Function Check"

When the engine is started, the MIL should go off.
If the MIL remains on, the on board diagnostic system has
detected engine system malfunction.

SEF217U

DIAGNOSIS SYSTEM (TCM)

TM-111

< FUNCTION DIAGNOSIS >

[5AT: RE5R05A]

DIAGNOSIS SYSTEM (TCM)

Diagnosis Description

INFOID:0000000001672118

TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)

Description

As a method for locating the suspected circuit, when the self-diagnostics start signal is input, the memory for
the malfunction location is output and the A/T CHECK indicator lamp flashes to display the corresponding
DTC.

Operation Procedure

Start the engine with selector lever in “P” position. Warm engine to normal operating temperature.

Turn ignition switch ON and OFF at least twice, then leave it in the OFF position.

Wait 10 seconds.

Turn ignition switch ON. (Do not start engine.)

Check A/T CHECK indicator lamp comes on for about 2 seconds.

CAUTION:

If A/T CHECK indicator lamp does not come on, refer to

TM-188, "Symptom Table"

Turn ignition switch OFF.

Keep pressing shift lock release button.

Shift the selector lever from “P” to “D” position.

Release accelerator pedal. (Set the closed throttle position signal ON.)

10. Depress brake pedal. (Stop lamp switch signal ON.)

11. Turn ignition switch ON. (Do not start engine.)

12. Wait 3 seconds.
13. Shift the selector lever to the manual shift gate side. (Manual mode signal ON.)

14. Release brake pedal. (Stop lamp switch signal ON.)

15. Shift the selector lever to “D” position. (Manual mode signal OFF.)
16. Depress brake pedal. (Stop lamp switch signal ON.)

17. Release brake pedal. (Stop lamp switch signal OFF.)

18. Depress accelerator pedal fully and release it.
19. Check A/T CHECK indicator lamp. Refer to “Judgment Self-diagnosis Code”.

CAUTION:

If the system does not go into self-diagnosis, refer to

TM-188, "Symptom Table"

Judgment Self-diagnosis Coed

TM-112

< FUNCTION DIAGNOSIS >

[5AT: RE5R05A]

DIAGNOSIS SYSTEM (TCM)

If there is a malfunction, the lamp lights up for the time corresponding to the suspect circuit.

Erase Self-diagnosis

In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is stored
into the control unit as necessary during use by the user. This memory is not erased no matter how many
times the ignition switch is turned ON and OFF.
However, this information is erased by turning ignition switch OFF after performing self-diagnostics or by eras-
ing the memory using the CONSULT-III.

CONSULT-III Function (TRANSMISSION)

INFOID:0000000001672119

CONSULT-III APPLICATION ITEMS

No.

Malfunctioning item

No.

Malfunctioning item

Revolution sensor

TM-125

A/T interlock

TM-148

Direct clutch solenoid valve