Possible DTC:
P0201 (Sylinder #1 Injector)
P0202 (Sylinder #2 Injector)
P0203 (Sylinder #3 Injector)
P0204 (Sylinder #4 Injector)
＊ CC-CODE
C018 (Line : Short circuit)
Engine can be severely damaged due to continuous fuel injection.
Possible causes of trouble :
Short circuit of high side line to Bat Shrot circuit of low side line to GND Injectors Injector voltage (ECU) |
C019 (Line : Open circuit)
Possible causes of trouble :
High side line or low side line broken Contact resistance Injectors Injector voltage (ECU) |
Ignition off. Check wiring between ECU and injectors.
Injector 1 / ECU | Injector 2 / ECU | |
Pin No. | 1 / 114 | 1 / 121 |
2 / 117 | 2 / 118 |
Injector 3 / ECU | Injector 4 / ECU | |
Pin No. | 1 / 120 | 1 / 119 |
2 / 118 | 2 / 117 |
Measure the resistance of injectors with plug disconnected.
Set value : 0.3 ~ 0.6 Ω (at room temperature)
Check the actuation of injectors with clip- on ammeter of Motortester.
Clip-on ammeter must satisfy the following conditions.
Measuring range ＞ 25A
Bandwidth ＞ 100 kHz
Attach the plug to injector
Fasten clip-on ammeter around lead to pin 2 of corresponding injector.
Allow the engine to idle. Set value : Refer to the following Fig. Injector set value(current) on next page.
Length of holding current phase (Max. 12A) is governed by engine speed, injection time, and changes on acceleration.
The first current curve shows the pre-injection.
Check whether injector injects fuel. To do so, pull off the injector plug in each case and connect to replacement injector.
If change to engine running results, injector is injecting.
If no change to engine running results injector is not injecting.
This test cannot however establish whether an injetor is injecting correct quantity.
If necessary, all injectors have to be replaced.
