Dodge ZB 2005 Service Manual page 1243

DRIVEABILITY - GAS
Symptom:
P0500-NO VEHICLE SPEED SIGNAL
When Monitored and Set Condition:
P0500-NO VEHICLE SPEED SIGNAL
When Monitored: Engine Temperature greater than 104 deg F, MAP vacuum approxi-
mately 15 to 16 inches of mercury and Engine RPM between 1400 and 3000 rpm.
Set Condition: No Vehicle Speed Signal for more than 15 seconds on two consecutive
trips.
GOOD TRIP EQUAL TO ZERO
(G7) VEHICLE SPEED SIGNAL CIRCUIT SHORTED TO VOLTAGE
(G7) VEHICLE SPEED SIGNAL CIRCUIT OPEN BETWEEN CAB AND PCM
(G7) VEHICLE SPEED SIGNAL CIRCUIT SHORTED TO GROUND
PCM
TEST
1 Ignition on, engine not running.
NOTE: With the DRBIII check for any related DTCs that may be present in
the ABS/RWAL Module or TCM, diagnose any ABS/RWAL Module DTC's
before continuing.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
No
2 Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the CAB Module harness connector.
Ignition on, engine not running.
Measure the voltage of the (G7) Vehicle Speed Signal circuit in the ABS/RWAL or
PCM harness connector.
Is the voltage above 4.9 volts?
Yes → Repair the short to voltage in the (G7) Vehicle Speed Signal
No
POSSIBLE CAUSES
ACTION
→ Refer to the INTERMITTENT CONDTION Symptom (Diagnostic
Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
circuit between the CAB and PCM.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
→ Go To 3
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APPLICABILITY
All
All