Powertrain Controls - ECM/PCM

***This article was updated by TSB No. 65-65-27***

DTC 35 Injection Pulse Width Error (Response Time Short):

Injection Pulse Width Error:

CIRCUIT DESCRIPTION
The fuel injector driver receives an inject command signal from the Powertrain Control Module (PCM) and provides a current regulated output to the fuel solenoid that controls injection. It also returns an injection pulse width signal back to the PCM to inform it when the fuel solenoid has actually seated. This injection pulse width signal is measured in micro seconds.

DTC 35 WILL SET WHEN
^ Battery voltage greater than 10 volts.
^ Engine coolant temperature greater that 20°C (68°F).
^ Injection pulse width less that 1.5 milliseconds.

ACTION TAKEN (PCM will default to)
Fixed injection pulse width value.

DTC 35 WILL CLEAR WHEN
The fault condition(s) no longer exist, and the ignition switch is cycled "OFF" then "ON."

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This step will determine if DTC 35 is the result of a hard failure or an intermittent.
2. This will check CKT 985 for an open.

DIAGNOSTIC AIDS
The injection pulse width will fluctuate slightly when throttle is depressed.