2190260

1.

Check for damaged harness and terminals including rubber seals :

-. contact resistance, oxidation, corrosion, bent or broken terminals

-. harness connector connection, loose wires etc.

2.

Check for poor connection between ECM and component :

-. backed out terminal, improper mating, broken locks and poor terminal to wire connection

3.

ARE THE WIRES O.K ? & ARE THE CONNECTIONS O.K ?

YES

a.

Go to "Signal Circuit Inspection" procedure.

NO

a.

Repair as necessary and go to " Verification of Vehicle Repair " procedure

1.

DTCs listed below are stored in the scan tool

P0267/P0268/P0269

2.

Check items with the scan tool and the multimeter

① Wiring harness inspection

② Check the injector resistance

③ Waveform at the low side circuit and the high side circuit

3.

Specification :

a.

Resitance : below 1 Ω for open in the wire

b.

Resitance : infinite for short to ground in the wire

c.

Voltage : below 0.5V for short to power in the wire

d.

Registance value : 0.3 ~ 0.6 Ω at 20℃(68℉)

caution

Refer to the component and full circuit for connector configrations details

4.

Disconnect the injector and check the continuity the follwing circuit : Between the injector No.3 terminal 2 and the ECM terminal 39/C230-2.

5.

IS THERE A CONTINUITY ?

YES

a.

Intermittent failure, system is O.K at this time.

b.

Check for poor connections or loose wire at the injector and the ECM

c.

Go to step 3

NO

a.

Repair short in the wire between the injector No.3 terminal 2 and the ECM terminal 39/C230-2.

b.

Repair as necessary for wiring harness or connector terminal.

c.

Go to step 3

6.

Connect the scan tool to the data link connector(DLC).

7.

Connect the CH A probe of scan tool to the injector No.3 terminal 2 and start the engine.

8.

Check the signal waveform at the low side while idling.

9.

IS THERE SIGNAL WAVEFORM PROPERLY ?

YES

a.

Go to "Verification of Vehicle Repair" procedure

NO

a.

Replace the injector. For checking the inejctor , Go to "Component Inspection" procedure

b.

Replace a known - good ECM and recheck. If the signal waveform is checked normally, replace the ECM.

WAVEFORM ANALYSIS

This test should be inspected after depressing the HOLD mode while idling. At first, the waveform obserbation points is height of injector coil induced voltage (booster voltage) (above 70V) In second place, the injector drive time will be checked at the low side. When the engine speed is suddenly raced the injector drive time extended at first, but the drive time will soon match the engine speed. If the waveform pattern becomes distorted during the acceleration or deceleration, replace the injector after checking the resistance.

YES

a.

Go to "Verification of Vehicle Repair" procedure

10.

Disconnect the injector and check the continuity the follwing circuit : Between the injector No.2,3 terminal 1 and the ECM terminal 37/C230-2.

11.

ARE THERE THE CONTINUITY ?

YES

a.

Intermittent failure, system is O.K at this time.

b.

Check for poor connections or loose wire at the injector and the ECM.

c.

Go to step 3

NO

a.

Repair short in the wire between the injector No.2,3 terminal 1 and the ECM terminal 37/C230-2.

b.

Repair as necessary for wiring harness or connector terminal.

c.

Go to step 3

12.

Connect the scan tool to the data link connector(DLC).

13.

Connect the CH A probe of scan tool to the injector terminal 1 for the injector No.2,3 individually and start the engine.

14.

Check the signal waveform at the high side while idling.

15.

IS THERE SIGNAL WAVEFORM PRORERLY ?

YES

a.

Go to "Verification of Vehicle Repair" procedure.

NO

a.

Replace the injector. For checking the inejctor , Go to "Component Inspection" procedure

b.

Replace a known - good ECM and recheck. If the signal waveform is checked normally, replace the ECM.

WAVEFORM ANALYSIS

This test should be inspected after depressing the HOLD mode while idling. At first, the waveform obserbation points is height of injector coil induced voltage (booster voltage) (above 70V) In second place, the injector drive time will be checked at the low side. When the engine speed is suddenly raced the injector drive time extended at first, but the drive time will soon match the engine speed. If the waveform pattern becomes distorted during the acceleration or deceleration, replace the injector after checking the resistance

YES

a.

Go to "Verification of Vehicle Repair" procedure

16.

Disconnect the injector and check the continuity the follwing circuit :

① Between the injector No.2,3 terminal 1 and the ECM terminal 37/C230-2.

② Between the injector No.3 terminal 2 and the ECM terminal 39/C230-2.

17.

ARE THERE THE CONTINUITY ?

YES

a.

Intermittent failure, system is O.K at this time.

b.

Check for poor connections or loose wire at the injector and the ECM.

c.

Go to step 3

NO

a.

Repair open or short in the wire between the injector No.2, 3 terminal 1 and the ECM terminal 37/C230-2.

b.

Repair open or short in the wire between the injector No.3 terminal 2 and the ECM terminal 39/C230-2.

c.

Repair as necessary for wiring harness or connector terminal.

d.

Go to step 3

18.

Check the signal waveform at the low and the high side or the current signal waveform while idling.

a.

Standard Value (Measuring range > 25 A, Bandwidth > 100 kH)

① Peak current : 19A (Min) ~ 21A (Max)

② Hold current : 11A (Min) ~ 13A (Max)

③ Recharge current : 7A

WAVEFORM ANALYSIS

① Length of holding current phase (Max.12A) is governed by the engine speed, injection time, and changes on acceleration

② The first current curve shows the pre-injection

☞ For more the inejctor signal waveform analysis , Go to "Component Inspection" procedure

YES

a.

Go to "Verification of Vehicle Repair" procedure

NO

a.

Recheck the wiring harness

b.

Replace the injector. For checking the inejctor , Go to "Component Inspection" procedure.

c.

Replace a known - good ECM and recheck. If the signal waveform is checked normally, replace the ECM.