Chrysler Voyager. Manual — part 72
TEST
ACTION
APPLICABILITY
8
Turn the ignition off.
Disconnect the applicable Temperature Sensor harness connector.
Ignition on, engine not running.
With the DRBIII
t, read the Temperature Sensor voltage.
Is the voltage above 4.6 volts?
All
Yes
→ Go To 9
No
→ Go To 12
9
Turn the ignition off.
Disconnect the applicable Temperature Sensor harness connector.
Using a jumper wire, jumper across the Temperature Sensor harness connector.
Ignition on, engine not running.
With the DRBIII
t, read the Temperature voltage.
Is the voltage below 1.0 volt?
All
Yes
→ Replace the applicable Temperature Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→ Go To 10
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 Signal circuit from the Temperature Sensor harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 11
No
→ Repair the open in the Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
11
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 - NGC.
No
→ Repair the open in the Sensor ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
287
DRIVEABILITY - NGC
P0128-THERMOSTAT RATIONALITY —
Continued
TEST
ACTION
APPLICABILITY
12
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 - NGC.
No
→ Go To 13
13
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 - NGC.
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 - NGC.
288
DRIVEABILITY - NGC
P0128-THERMOSTAT RATIONALITY —
Continued
Symptom:
P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW
When Monitored and Set Condition:
P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW
When Monitored:
With the ignition key on. No Cam or Crank signal within 75 ms. Engine
speed at less than 250 RPM.
Set Condition:
The PCM senses the voltage from the MAP sensor to be less than 2.196
volts but above 0.0392 of a volt for 300 milliseconds.One Trip Fault.
POSSIBLE CAUSES
IAC SIGNAL CIRCUIT LOW
IAC SIGNAL CIRCUIT HIGH
INTERMITTENT CONDITION
(K6) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(K6) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K6) 5 VOLT SUPPLY CIRCUIT OPEN
MAP SENSOR INTERNAL FAILURE
(K1) MAP SIGNAL CIRCUIT OPEN
(K1) MAP SIGNAL CIRCUIT SHORTED TO GROUND
PCM (K6) 5 VOLT SUPPLY CIRCUIT
PCM (K1) MAP SIG CIRCUIT
TEST
ACTION
APPLICABILITY
1
Ignition on, engine not running.
With the DRBIII
t, read the MAP Sensor voltage.
Is the voltage below 2.2 volts.
All
Yes
→ Go To 2
No
→ Go To 11
2
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Ignition on, engine not running.
Measure the voltage of the (K6) 5 Volt Supply circuit in the MAP Sensor harness
connector.
Is the voltage between 4.5 to 5.2 volts?
All
Yes
→ Go To 3
No
→ Go To 7
289
DRIVEABILITY - NGC
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Ignition on, engine not running.
With the DRBIII
t, monitor the MAP Sensor voltage.
Is the voltage above 2.2 volts?
All
Yes
→ Replace the MAP Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→ Go To 4
4
Turn the ignition off.
Disconnect the MAP 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 (K1) MAP Signal circuit from the MAP Sensor harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 5
No
→ Repair the open in the (K1) MAP Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
5
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the (K1) MAP Signal circuit at the MAP
Sensor harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short to ground in the (K1) MAP Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→ Go To 6
6
NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
7
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Ignition on, engine not running.
Measure the voltage of the (K6) 5 Volt Supply circuit in the MAP Sensor harness
connector.
Is the voltage above 5.2 volts?
All
Yes
→ Repair the short to battery voltage in the (K6) 5 Volt Supply
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→ Go To 8
290
DRIVEABILITY - NGC
P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW —
Continued
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