TEST
ACTION
APPLICABILITY
9
Turn the ignition off.
Disconnect the CAB harness connector.
Disconnect the ECM harness connectors.
Disconnect the PCM harness connectors.
Disconnect the Junction Block C3 harness connector.
Measure the resistance between ground and the Vehicle Speed Signal circuit.
Is the resistance above 100 kohms?
All
Yes
→
Repair the Vehicle Speed Signal circuit between the Junction
Block and the Instrument Cluster for a short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Go To
10
10
Turn the ignition off.
Disconnect the Junction Block C2 harness connector.
Disconnect the CAB harness connector.
Disconnect the ECM harness connectors.
Disconnect the PCM harness connectors.
Measure the resistance between ground and the Vehicle Speed Signal circuit in the
CAB harness connector.
Is the resistance above 100 kohms?
All
Yes
→
Replace the Junction Block.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Go To
11
11
If there are no possible causes remaining, view repair.
All
Repair
Repair the Vehicle Speed Signal circuit for a short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
12
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. 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?
All
Yes
→
Repair as necessary
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Test Complete.
88
DRIVEABILITY - DIESEL
P0500-VEH. SPEED SENSOR PEC FREQUENCY TOO HIGH —
Continued