TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the ECM harness connector.
Measure the resistance of the Immobilizer Signal circuit between the PCM harness
connector and the ECM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
Go To
4
No
→
Repair the Immobilizer Signal circuit for an open.
Perform NO START VERIFICATION - VER-1.
4
Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the ECM harness connector.
Measure the resistance between ground and the Immobilizer Signal circuit at the
PCM harness connector.
Is the resistance above 100 kohms?
All
Yes
→
Go To
5
No
→
Repair the Immobilizer Signal circuit for a short to ground.
Perform NO START VERIFICATION - VER-1.
5
Turn the ignition off.
Disconnect the PCM harness connector.
Turn the ignition on.
Measure the amperage between PCM harness connector C-3 cavity 16 and ground.
Is the amperage between 1.0 and 1.4 milliamperes?
All
Yes
→
Go To
6
No
→
Replace and program the ECM in accordance with the Service
Information.
Perform NO START VERIFICATION - VER-1.
6
With the DRBIII
t, select the Lab Scope function.
Set the voltage range to +20.0V
Set the probe to X10.
Set the time range to 0.1S/Div.
Turn the ignition on.
Using the oscilloscope lead, backprobe the PCM harness connector C3 cavity 16.
NOTE: A valid immobilizer signal will cycle high and low similar to the
pattern shown in Charts and Graphs.
Does the DRB display show the 12-volt signal cycling high and low?
All
Yes
→
Replace and program the ECM in accordance with the Service
Information.
Perform NO START VERIFICATION - VER-1.
No
→
Replace the PCM in accordance with the Service Information.
Perform NO START VERIFICATION - VER-1.
232
STARTING
*NO START CONDITION —
Continued