Specifications

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Install a substitute relay in place of the Engine Control Relay.
Turn the ignition on.
With the DRBIIIt, erase DTCs.
Perform several ignition key cycles, pausing for at least 10 seconds between each
cycle.
Turn the ignition on.
With the DRB, read ECM DTCs.
Did this DTC set again?
All
Yes → Go To 4
No → Replace the Engine Control Relay.
Perform ROAD TEST VERIFICATION - VER-2.
4 Turn the ignition off.
Remove the Engine Control Relay.
Disconnect the ECM harness connectors.
Measure the resistancebetween ground andthe Engine ControlRelay Controlcircuit
while wiggling the wiring harness and connectors.
Was the resistance below 1000.0 ohms at any time while wiggling the wiring harness
and connectors?
All
Yes → Repair the Engine Control Relay Control circuit for an intermit-
tent short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
No → Go To 5
5 Turn the ignition off.
Remove the Engine Control Relay.
Turn the ignition on.
Measure the voltage of the Engine Control Relay Output circuit.
Is the voltage below 0.5 volt?
All
Yes → Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No → Repair the Engine Control Relay Output circuit for a short to
voltage.
Perform ROAD TEST VERIFICATION - VER-2.
92
DRIVEABILITY - DIESEL
P1610-ENGINE CONTROL RELAY SHUTS OFF TOO LATE — Continued