Infiniti G37 Coupe. Manual - part 1333

TCM

TM-185

< ECU DIAGNOSIS >

[5AT: RE5R05A]

this happens, switch OFF the ignition switch for 10 seconds. Then switch it ON again to return to the normal
shift pattern. When the customer's vehicle has returned to normal, handle according to the “Work Flow” (Refer
to

TM-76, "Work Flow"

FAIL-SAFE FUNCTION

If any malfunction occurs in a sensor or solenoid, this function controls the A/T to make driving possible.

Vehicle Speed Sensor

Signals are input from two systems - from vehicle speed sensor A/T (revolution sensor) installed on the A/T
and from unified meter and A/C amp. so normal driving is possible even if there is a malfunction in one of the
systems. If vehicle speed sensor A/T (revolution sensor) has unusual cases, 5th gear and manual mode are
prohibited.

Accelerator Pedal Position Sensor

Throttle Position Sensor

If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM according
to a pre-determined accelerator angle to make driving possible. If there are malfunctions in tow systems, the
accelerator opening angle is controlled by the idle signal transmitted from the ECM which is based on input
indicating either idle condition or off-idle condition (pre-determined accelerator opening) in order to make driv-
ing possible.

PNP Switch

In the unlikely event that a malfunction signal enters the TCM, the position indicator is switched OFF, the
starter relay is switched OFF (starter is disabled), the back-up lamp relay switched OFF (back-up lamp is OFF)
and the position is fixed to the “D” position to make driving possible.

Starter Relay

The starter relay is switched OFF. (Starter is disabled.)

A/T Interlock

• If there is an A/T interlock judgment malfunction, the A/T is fixed in 2nd gear to make driving possible.

NOTE:
When the vehicle is driven fixed in 2nd gear, a turbine revolution sensor malfunction is displayed,
but this is not a turbine revolution sensor malfunction.

• When interlock is detected at the 3rd gear or more, it is locked at the 2nd gear.

A/T 1st Engine Braking

When there is an A/T first gear engine brake judgment malfunction, the low coast brake solenoid is switched
OFF to avoid the engine brake operation.

Line Pressure Solenoid

The solenoid is switched OFF and the line pressure is set to the maximum hydraulic pressure to make driving
possible.

Torque Converter Clutch Solenoid

The solenoid is switched OFF to release the lock-up.

Low Coast Brake Solenoid

When a malfunction (electrical or functional) occurs, in order to make driving possible. If the solenoid is ON,
the A/T is held in 2nd gear. If the solenoid is OFF, the A/T is held in 4th gear. (Engine brake is not applied in
1st and 2nd gear.)

Input Clutch Solenoid

If a malfunction (electrical or functional) occurs with the solenoid either ON or OFF, the A/T is held in 4th gear
to make driving possible.

Direct Clutch Solenoid

If a malfunction (electrical or functional) occurs with the solenoid either ON or OFF, the A/T is held in 4th gear
to make driving possible.

Front Brake Solenoid

If a malfunction (electrical or functional) occurs with the solenoid ON, in order to make driving possible. The A/
T is held in 5th gear. If the solenoid is OFF, the A/T is in 4th gear.

TM-186

< ECU DIAGNOSIS >

[5AT: RE5R05A]

TCM

High and Low Reverse Clutch Solenoid

If a (electrical or functional) malfunction occurs with the solenoid either ON or OFF, the A/T is held in 4th gear
to make driving possible.

Turbine Revolution Sensor 1 or 2

The control is the same as if there were no turbine revolution sensors, 5th gear and manual mode are prohib-
ited.

DTC Inspection Priority Chart

INFOID:0000000001672223

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC “U1000 CAN COMM CIRCUT” is displayed with other DTC, first perform the trouble diagnosis
for “DTC U1000 CAN COMMUNICATION LINE”. Refer to

TM-118, "Description"

DTC Index

INFOID:0000000001672224

NOTE:
If DTC “U1000” is displayed with other DTC, first perform the trouble diagnosis for “DTC U1000 CAN
COMMUNICATION LINE”. Refer to

TM-118, "Description"

Priority

Detected items (DTC)

U1000 CAN communication line

Except above

DTC

Items

(CONSULT-III screen terms)

Reference page

OBD-II

Except OBD-II

MIL

, “ENGINE” with

CONSULT-III or

GST

CONSULT-III

only “TRANSMIS-

SION”

—

P0615

STARTER RELAY/CIRC

TM-119

P0700

TCM

TM-121

P0705

PNP SW/CIRC

TM-122

P0710

P1710

ATF TEMP SEN/CIRC

TM-144

P0717

TURBINE REV S/CIRC

TM-124

P0720

VEH SPD SEN/CIR AT

TM-125

P0725

ENGINE SPEED SIG

TM-128

P0731

A/T 1ST GR FNCTN

TM-130

P0732

A/T 2ND GR FNCTN

TM-132

P0733

A/T 3RD GR FNCTN

TM-134

P0734

A/T 4TH GR FNCTN

TM-136

P0735

A/T 5TH GR FNCTN

TM-138

P0740

TCC SOLENOID/CIRC

TM-140

P0744

A/T TCC S/V FNCTN

TM-141

P0745

L/PRESS SOL/CIRC

TM-142

—

P1705

TP SEN/CIRC A/T

TM-143

—

P1721

VEH SPD SE/CIR-MTR

TM-147

P1730

A/T INTERLOCK

TM-148

—

P1731

A/T 1ST E/BRAKING

TM-149

P1752

I/C SOLENOID/CIRC

TM-150

P1757

FR/B SOLENOID/CIRC

TM-151

TCM

TM-187

< ECU DIAGNOSIS >

[5AT: RE5R05A]

*1: Refer to

TM-108, "Diagnosis Description"

*2: These numbers are prescribed by SAE J2012.

P1762

D/C SOLENOID/CIRC

TM-152

P1767

HLR/C SOL/CIRC

TM-153

P1772

LC/B SOLENOID/CIRC

TM-154

P1774

LC/B SOLENOID FNCT

TM-155

—

P1815

MANU MODE SW/CIRC

TM-157

U1000

CAN COMM CIRCUIT

TM-118

DTC

Items

(CONSULT-III screen terms)

Reference page

OBD-II

Except OBD-II

MIL

, “ENGINE” with

CONSULT-III or

GST

CONSULT-III

only “TRANSMIS-

SION”

TM-188

< SYMPTOM DIAGNOSIS >

[5AT: RE5R05A]

SYSTEM SYMPTOM

SYMPTOM DIAGNOSIS

SYSTEM SYMPTOM

Symptom Table

INFOID:0000000001672225

• The diagnostics item numbers show the sequence for inspection. Inspect in order from item 1.
• Overhaul and inspection inside the A/T only if A/T fluid condition is NG. Refer to

TM-214, "Inspection"

No.

Item

Symptom

Condition

Diagnostic item

Reference

page

Shift
Shock

Large shock. (“N”

→

“D” position)