1

2

3

4

Fuel Pump Harness Connector SO29

FE11-5606b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect instrument cluster harness connector IP03.

(c)

Disconnect the fuel level sensor wiring harness connector
SO29.

(d)

Measure resistance between the fuel level sensor wiring
harness connector SO29 terminal No.1 and a reliable ground.

(e)

Measure voltage between the fuel level sensor wiring
harness connector SO29 terminal No.1 and a reliable ground.

Standard Value:

Connector Terminal

Standard Value:

Resistance Between SO29 (1) and A

Reliable Ground

10 kΩ or higher

Voltage Between SO29 (1) and A

Reliable Ground

0 V

Is the value specified value?

No

Repair open circuit or short circuit between
the SO29 terminal No.1 and IP03 terminal No.
29.

Yes

Step 3

Check the fuel sensor resistance.

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect the fuel level sensor wiring harness connector
SO29.

(c)

Remove the fuel pump. Refer to 

2.3.8.3

 

Fuel Pump Assembly

Replacement

.

(d)

Measure the fuel level sensor resistance according to the
following table.

Fuel

Resistance

Full

40( ± 2 Ω)

3/4

60( ± 2 Ω)

1/2

90( ± 2 Ω)

1/4

140( ± 2 Ω)

Threshold

190 ( ± 2 Ω)

Empty

300 ( ± 2 Ω)

Is the value specified value?

No

Replace the fuel level sensor. Refer to

2.3.8.4

 

Fuel Level Sensor Replacement

Body Electric

Instrument / Driver Information System

11-293

Yes

Step 4

Check whether the engine tachometer, speedometer are working as per normal?

No

Replace the fuel level sensor. Refer to

2.3.8.4

 

Fuel Level Sensor Replacement

Yes

Step 5

Replace the instrument cluster. Refer to 

11.7.7.1

 

Instrument Cluster Replacement

.

Next

Step 6

Use scan tool to confirm whether the DTC Code is stored again.

(a)

Connect scan tool to the datalink connector.

(b)

Turn the ignition switch to "ON" position.

(c)

Clear the DTC code.

(d)

Read the DTC Code again, confirm the system has no DTC
code.

Is the value specified value?

No

Go to step 1

Yes

Step 7

Diagnostic Completed.

11.7.6.7 DTC U129C U129D

DTC

U129C

Meter voltage Higher Than Normal.

DTC

U129D

Meter voltage Lower Than Normal.

11-294

Instrument / Driver Information System

Body Electric

Schematic:

IG1

IF25

IF19

IP05

IP03

IP03

IP03

IP03

C01

4

4

IP+B

IP05

C01

41

32

16

24

15

41

I/P Fuse Block

Instrument 

Cluster 

FE11-5604b

Diagnostic Steps:

Step 1

Check I/P fuse block fuses IF19 and IF25.

(a)

Turn the ignition switch to "OFF" position.

(b)

Remove I/P fuse block fuses IF19 and IF25.

(c)

Test these two fuses continuity with a multimeter.

Conducted?

Yes

Check whether there is a short. replace the
fuse.

No

Step 2

Check the meter power supply voltage.

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect the meter harness connector IP03.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure voltage between the meter harness connector IP03
terminal No.24 and a reliable ground.

(e)

Measure voltage between ECM harness connector IP03
terminal No.32 and a reliable ground.

Standard Value: :11-14 V

Body Electric

Instrument / Driver Information System

11-295

Is the voltage normal?

No

Repair the open circuit between fuse IF19 and
IP03 terminal No.32 . repair the open circuit
between fuse IF25 and IP03 terminal No.24.

Yes

Step 3

Check the instrument ground circuit.

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect the meter harness connector IP03.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure resistance between the gage wiring harness
connector IP03 terminal No.24 and a reliable ground.

(e)

Measure resistance between ECM harness connector EN01
terminal No.32 and a reliable ground.

Standard Value: Less than 1 Ω

Is the resistance normal?

No

ECM ground circuit is faulty. Repair the faulty
part.

Yes

Step 4

Check the charging system.

(a)

Check the battery voltage.
Standard Value: 11-14 V

(b)

Check the generator charging voltage.
Standard Value: 11.5-14.5 V

Normal?

No

Repair the faulty part.

Yes

Step 5

Replace the instrument cluster. Refer to 

11.7.7.1

 

Instrument Cluster Replacement

.

Next

Step 6

Use scan tool to confirm whether the DTC Code is stored again.

(a)

Connect scan tool to the datalink connector.

(b)

Turn the ignition switch to "ON" position.

(c)

Clear the DTC codes.

(d)

Start and run the engine at idle speed to warm up the engine
for at least 5 min.

(e)

Read control system DTC code again.

DTC codes still exist?

Yes

Go to step 1

11-296

Instrument / Driver Information System

Body Electric