Table of Contents
Advertisement
DRIVEABILITY - DIESEL
P0579-S/C SWITCH SIGNAL CIRCUIT SIGNAL VOLTAGE TOO LOW —
Continued
TEST
5
Turn the ignition off.
Disconnect the S/C ON/OFF/SET Switch harness connector.
Disconnect the S/C RESUME/ACCEL Switch harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the S/C Switch Signal circuit.
Is the resistance below 5.0 ohms?
Yes → Repair the S/C Switch Signal circuit for a short to ground.
→ Go To 6
No
6
If there are no possible causes remaining, view repair.
Repair
7
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FANS. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FANS. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
Yes → Repair as necessary
→ Test Complete.
No
ACTION
Perform SPEED CONTROL VERIFICATION - VER-4.
Replace the Engine Control Module in accordance with the Ser-
vice Information.
Perform SPEED CONTROL VERIFICATION - VER-4.
Perform SPEED CONTROL VERIFICATION - VER-4.
128
APPLICABILITY
All
All
All
Advertisement
Table of Contents
