Forklift Daewoo G15S-2 - GC32E-3 Fault Codes (Flash Codes) EWD

Corrective Action, First Check

None, used as a beginning and end

of the fault list identification

Check ECT sensor connector and

wiring for a short to GND

SECM (SIGNAL) PIN 16 to

ECT PIN A

SECM (GND) PIN 1 to

ECT PIN B

Check if ECT sensor connector is

disconnected or for an open ECT circuit

SECM (SIGNAL) PIN 16 to

ECT PIN A

SECM (GND) PIN 1 to

ECT PIN B

Check coolant system for radiator

blockage, proper coolant level and for

leaks in the system. Possible ECT short to GND, check ECT signal wiring

SECM (SIGNAL) PIN 16 to

ECT PIN A

SECM (GND) PIN 1 to

ECT PIN B

 Check regulator for coolant leaks

Check throttle connector connection

and TPS1 sensor for an open circuit

ETC PIN 6 to SECM PIN 17

(SIGNAL)

ETC PIN 2 to SECM PIN 1 (GND)

Check throttle connector and TPS1

sensor wiring for a shorted circuit

ETC PIN 6 to SECM PIN 17

(SIGNAL)

ETC PIN 2 to SECM PIN 1 (GND)

Check the throttle connector and pins

for corrosion.

Perform Throttle test with the Service

Tool several times to clean sensor

To check the TPS disconnect the

throttle connector and measure the

resistance (1.25KΩ +/-30%) from

TPS PIN 2 (GND) to

PIN 6 (TPS1 SIGNAL)

TPS PIN 3 (PWR) to PIN 6 (TPS1

SIGNAL)

Check the throttle connector and pins

for corrosion.

•  Perform Throttle test with the Service Tool several times to clean sensor

To check the TPS disconnect the

throttle connector and measure the

resistance (1.25KΩ +/-30%) from

TPS PIN 2 (GND) to PIN 6 (TPS1

SIGNAL)

TPS PIN 3 (PWR) to PIN 6 (TPS1

SIGNAL)

Check for debris or obstructions

inside the throttle body

Perform the Throttle test using the

Service Tool and re-check for fault

Check throttle-plate shaft for bearing

wear

Check the ETC driver wiring for an

open circuit

ETC+ PIN 1 to SECM PIN 22

ETC-PIN 4 to SECM PIN 24

Check the ETC internal motor drive

by disconnecting the throttle

connector and measuring the motor

drive resistance at the throttle

TPS PIN 1 (+DRIVER) to PIN 4 (-

DRIVER) ~3.0Ω +/-30%

Check for manifold leaks between the

throttle and the engine

Note: Fault Code 27 is predicted

TPS. This fault means that the throttle

and our calculated prediction for

throttle do not agree. This code often

comes up as suspected during

transient manuevers. It is not system

trouble. If the fault really sets, then

the engine will shut down.

Perform throttle spring test by cycling

the ignition key and re-check for fault

Check ETC driver wiring for a shorted

circuit

ETC+ PIN1 to SECM PIN 22

ETC- PIN 4 to SECM PIN 24

• z Perform Throttle test and with the Service Tool and re-check for fault

Check the ETC internal motor drive

by disconnecting the throttle

connector and measuring the motor

drive resistance at the throttle

TPS PIN 1 (+DRIVER) to PIN 4 (-

DRIVER) ~3.0Ω +/-30%

Check TMAP connector and MAP

signal wiring for an open circuit

TMAP PIN 4 to SECM PIN 5

(SIGNAL)

TMAP PIN 1 to SECM PIN 1 (GND)

TMAP PIN 3 to SECM PIN 18

(XDCR +5VDC)

Check the MAP sensor by

disconnecting the TMAP connector

and measuring at the sensor

TMAP PIN 1(GND) to PIN 4

(PRESSURE SIGNAL KPA) (2.4kΩ -

8.2kΩ)

TMAP PIN 3(PWR) to PIN 4

(PRESSURE SIGNAL KPA) (3.4kΩ - 8.2kΩ)

Check TMAP connector and MAP

signal wiring for an open circuit

TMAP PIN 4 to SECM PIN 5

(SIGNAL)

TMAP PIN 1 to SECM PIN 1 (GND)

TMAP PIN 3 to SECM PIN 18

(XDCR +5VDC)

Check the MAP sensor by

disconnecting the TMAP connector

and measuring at the sensor

TMAP PIN 1(GND) to PIN 4

(PRESSURE SIGNAL KPA) (2.4kΩ -

8.2kΩ)

TMAP PIN 3(PWR) to PIN 4

(PRESSURE SIGNAL KPA) (3.4kΩ - 8.2kΩ)

Check TMAP connector and IAT

signal wiring for a shorted circuit

TMAP PIN 2 to SECM PIN 4

(SIGNAL)

TMAP PIN 1 to SECM PIN 1 (GND)

TMAP PIN 3 to SECM PIN 18 (XDCR

+5VDC)

To check the IAT sensor of the TMAP

disconnect the TMAP connector and

measure the IAT resistance

Check TMAP connector and IAT

signal wiring for a shorted circuit

TMAP PIN 2 to SECM PIN 4

(SIGNAL)

TMAP PIN 1 to SECM PIN 1 (GND)

TMAP PIN 3 to SECM PIN 18 (XDCR

+5VDC)

To check the IAT sensor of the TMAP

disconnect the TMAP connector and

measure the IAT resistance

Check coil driver wiring and

connector for shorts

SECM PIN 7(EST1) to COIL PIN A

Verify GND on COIL PIN B

Verify GND on COIL PIN C

Verify GND on COIL PIN D

Verify +12vdc on COIL PIN E

To check the Smart Coil internal

circuit disconnect the coil connector

and measure the resistance from pin

to pin

Check coil driver wiring for an open

circuit or disconnected connector

SECM PIN 7(EST1) to COIL PIN A

Verify GND on COIL PIN B

Verify GND on COIL PIN C

Verify GND on COIL PIN D

Verify +12vdc on COIL PIN E

To check the Smart Coil internal

circuit disconnect the coil connector

and measure the resistance from pin

to pin

Check battery voltage

 Perform maintenance check on

electrical connections to the

battery and chassis ground

 Check battery voltage during

starting and with the engine

running to verify charging system

and alternator function

Measure battery power at the SECM

with a multimeter

SECM PIN 13 (BATT +) to SECM

PIN 14 (BATT -)

Measure transducer power at the TMAP connector with a multimeter

TMAP PIN 3 +5VDC to TMAP PIN 1 XDCR GND

Verify transducer power at the SECM with a multimeter

SECM PIN 18 +5VDC to SECM PIN 1 XDCR GND

Verify transducer power at ETC with a multimeter

ETC PIN 3 XDCR PWR to ETC PIN 2 XDCR GND Verify transducer power to the Acceleration Pedal with a multimeter

Measure transducer power at the TMAP connector with a multimeter

TMAP PIN 3 +5VDC to TMAP PIN 1 XDCR GND

Verify transducer power at the SECM with a multimeter

SECM PIN 18 +5VDC to SECM PIN 1 XDCR GND

Verify transducer power at ETC with a multimeter

ETC PIN 3 XDCR PWR to ETC PIN 2 XDCR GND Verify transducer power to the Acceleration Pedal with a multimeter

Usually associated with additional

ETC faults

 Check for ETC Sticking or other

ETC faults

 Verify if the lift truck was motored

down a steep grade

Check Acceleration Pedal connector

Check APP1 signal at SECM

PIN 15

Check Acceleration Pedal connector

 Check APP1 signal at SECM

PIN 15

Check Acceleration Pedal connector

 Cycle the pedal several times

and check APP1 signal at SECM

PIN 15

Check Acceleration Pedal connector

 Cycle the pedal several times

and check APP1 signal at SECM

PIN 15

Check Acceleration Pedal connector

 Cycle the pedal several times

and check APP2 signal at SECM

PIN 2

Check Acceleration Pedal connector

Check APP2 signal at SECM

PIN 2

Check Acceleration Pedal connector

Check APP2 signal at SECM

PIN 2

Check Acceleration Pedal connector

 Cycle the pedal several times

and check APP1 signal at SECM

PIN 15

 Check APP2 signal at SECM

PIN 2

Check FTV for an open wire or FTV

connector being disconnected

FTV PIN A (SIGNAL) TO PIN B

(PWR)

Check FTV for an open coil by

disconnecting the FTV connector and

measuring the resistance (~26Ω +/-

2Ω)

FTV PIN A (SIGNAL) TO PIN B

(PWR)

Engine measured Air/Fuel ratio at the

O2 sensor is excessively lean

 Check for intake manifold leaks

 Check balance line (vacuum

hose) connection at the regulator

Check N-CA55-500-TR mixer for

heavy end build-up and

operation (see mixer section)

z Check N2001 secondary for

operation or low primary

pressure (see N2001 Regulator

section)

Note: If LP-Gas fuel in LP tank is not

enough, this fault code can be set. If

LP tank is frozen, this fault code can

be set, too. It is not system trouble.

Engine measured Air/Fuel ratio at the

O2 sensor is excessively rich

Check FTV connector wiring for an

open circuit

FTV PIN A (SIGNAL) TO PIN B

(PWR)

Check FTV for an open coil by

disconnecting the FTV connector and

measuring the resistance (~26Ω +/-

2Ω)

FTV PIN A (SIGNAL) TO PIN B

(PWR)

Check N-CA55-500-TR mixer for

heavy end build-up and

operation (see mixer section)

 Check N2001 secondary for

operation (see N2001 Regulator

section)

Check the FTV for proper operation

 Check FTV Hose Connections

Check FTV for an open coil by

disconnecting the FTV connector and

measuring the resistance

(~26Ω +/-2Ω)

FTV PIN A (SIGNAL) TO PIN B

(PWR)

Note: If LP-Gas fuel in LP tank is not

enough, this fault code can be set. If

LP tank is frozen, this fault code can

be set, too. It is not system trouble.

Check if O2 sensor is shorted to

+5VDC or Battery.

O2 (SIGNAL) PIN B to SECM PIN 3

(AFRTrimValveLowerDC fault should also occur)

Verify O2 sensor heater circuit is operating by measuring circuit resistance (2.1Ω +/-0.4Ω)

O2 PIN C (HEATER GND) to PIN D (HEATER PWR)