Chrysler RG Voyager. Manual — part 594
TEST
ACTION
APPLICABILITY
10
Turn the ignition off.
Disconnect the applicable Temperature Sensor harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the Sensor ground circuit from the Ambient Air Temper-
ature Sensor harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ NOTE: Before continuing, check the PCM harness connector
terminals for corrosion, damage, or terminal push out. Repair as
necessary. Replace and program the Powertrain Contorl Module
in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Repair the open in the Sensor ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
11
Turn the ignition off.
Disconnect the applicable Temperature Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the Signal circuit in the Temperature
harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short to ground in the Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 12
12
Turn the ignition off.
Disconnect the applicable Temperature Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the Signal circuit and the Sensor ground circuit in
the Temperature Sensor harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the Sensor ground shorted to the Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ NOTE: Before continuing, check the PCM harness connector
terminals for corrosion, damage or terminal push out. Repair as
necessary. Replace and program the Powertrain Control Module
in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
258
DRIVEABILITY - NGC
P1115-GENERAL TEMP SENSOR PERFORMANCE —
Continued
Symptom:
P1593-SPEED CONTROL SWITCH STUCK
When Monitored and Set Condition:
P1593-SPEED CONTROL SWITCH STUCK
When Monitored:
Ignition on.
Set Condition:
S/C Switch is mechanically stuck in the On/Off, Resume/Accel, or Set
position for too long. One trip fault.
POSSIBLE CAUSES
SPEED CONTROL SWITCH STATUS
SPEED CONTROL SWITCHES
(V37) S/C SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(V37) S/C SIGNAL CIRCUIT OPEN
(K4) SENSOR GROUND OPEN
PCM
TEST
ACTION
APPLICABILITY
1
Start the engine.
With the DRBIII
t, monitor each switch function for the Speed Control Switches.
Press and release each Speed Control Button.
- Resume/Accel
- Cancel
- Decel (Coast)
- On/Off
- Set
Does each switch function change status when pressing and then depressing each
switch?
All
Yes
→ Refer to the INTERMITTENT CONDITION Symptom in the
Diagnostic category.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
No
→ Go To 2
259
DRIVEABILITY - NGC
TEST
ACTION
APPLICABILITY
2
Turn the ignition off.
Remove the Speed Control Switches from the steering wheel.
Measure the resistance across each Switch Control Switch.
Monitor the ohmmeter while pressing each function button on each switch.
Resume/Accel - 15,400 ohms
Cancel - 909 +/- 9 ohms
Decel (Coast) - 2940 +/- 30 ohms
On/Off - 0 ohms
Set - 6650 +/- 66 ohms
Does the function on the Speed Control Switches have the correct resistance value?
All
Yes
→ Go To 3
No
→ Replace the Speed Control Switch that had the incorrect resis-
tance value.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
3
Measure the voltage on the (V37) S/C Signal circuit at the Speed Control harness
connector.
Is the is the voltage above 5.0 volts?
All
Yes
→ Repair the short to battery voltage in the (V37) S/C Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
No
→ Go To 4
4
NOTE: The measurement must be taken from both Speed Control Switch
harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (V37) S/C Signal circuit from the Speed Control
harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms for both measurement?
All
Yes
→ Go To 5
No
→ Repair the open in the (V37) S/C Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
5
NOTE: The measurement must be taken from both Speed Control Switch
harness connectors.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K4) Sensor ground circuit from the Speed Control
harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms for both measurements?
All
Yes
→ Go To 6
No
→ Repair the open in the (K4) Sensor ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
260
DRIVEABILITY - NGC
P1593-SPEED CONTROL SWITCH STUCK —
Continued
TEST
ACTION
APPLICABILITY
6
NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module per Service
Information.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
261
DRIVEABILITY - NGC
P1593-SPEED CONTROL SWITCH STUCK —
Continued
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