Dodge Caliber. Manual - part 687

CAMSHAFT 1/2 POSITION SENSOR CIRCUIT WIRING OR CONNECTORS

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Camshaft 1/2 Posi-
tion Sensor and the Powertrain Control Module (PCM).

Look for any chafed, pierced, pinched, or partially broken wires.

Look for broken, bent, pushed out or corroded terminals.

Inspect the Camshaft 1/2 Position Sensor for conditions such as loose mounting screws, damage, or cracks.

Were any problems found?

Yes

>> Repair as necessary.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

>> Go to 4

CRANKSHAFT POSITION SENSOR IRREGULAR SIGNAL

Using a lab scope and the Miller special tool #6801, backprobe the (K24) CKP Signal circuit in the Crankshaft Posi-
tion Sensor harness connector.

Ignition on, engine not running.

Wiggle the related wire harness and lightly tap on the Crankshaft Position Sensor while monitoring the lab scope
screen.

Start the engine.

Monitor the Crankshaft Position Sensor signal on the lab scope screen.

Were any Crankshaft Position Sensor signals irregular or missing?

Yes

>> Go to 6

>> Go to 5

CAMSHAFT 1/2 POSITION SENSOR IRREGULAR SIGNAL

Turn the ignition off.

Using a lab scope and the Miller special tool #6801, backprobe the
(K441) CMP 1/2 Signal circuit in the Camshaft 1/2 Position Sensor har-
ness connector.

Ignition on, engine not running.

Wiggle the related wire harness and lightly tap on the Camshaft 1/2
Position Sensor while monitoring the lab scope screen.

Start the engine.

Monitor the Camshaft 1/2 Position Sensor signal on the lab scope
screen.

Were any Camshaft 1/2 Position Sensor signals irregular or
missing?

Yes

>> Go to 7

>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -

DIAGNOSIS AND TESTING)

ENGINE ELECTRICAL DIAGNOSTICS - GPEC

9 - 35

CRANKSHAFT, TONE WHEEL OR FLEX PLATE

Turn the ignition off.

Remove the Crankshaft Position Sensor.

Inspect the Crankshaft Position Sensor and mounting area for any condition that would result in an incorrect signal,
such as damage, foreign material, or excessive movement.

Were any problems found?

Yes

>> Repair as necessary in accordance with the Service Information.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

>> Go to 8

CAMSHAFT, TONE WHEEL OR PULSE RING

Turn the ignition off.

Remove the Camshaft 1/2 Position Sensor.

Inspect the Camshaft 1/2 Position Sensor and mounting area for any condition that would result in an incorrect
signal, such as damage, foreign material or excessive movement.

Were any problems found?

Yes

>> Repair as necessary in accordance with the Service Information.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

>> Go to 9

CRANKSHAFT POSITION SENSOR

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Crankshaft Position
Sensor and the Powertrain Control Module (PCM).

Look for any chafed, pierced, pinched, or partially broken wires.

Look for broken, bent, pushed out or corroded terminals.

Were any problems found?

Yes

>> Repair as necessary.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

>> Replace the Crankshaft Position Sensor.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

CAMSHAFT 1/2 POSITION SENSOR

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Camshaft 1/2 Posi-
tion Sensor and the Powertrain Control Module (PCM).

Look for any chafed, pierced, pinched, or partially broken wires.

Look for broken, bent, pushed out or corroded terminals.

Were any problems found?

Yes

>> Repair as necessary.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

>> Replace the Camshaft 1/2 Position Sensor.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

9 - 36

ENGINE ELECTRICAL DIAGNOSTICS - GPEC

P0031-O2 SENSOR 1-1 HEATER CIRCUIT LOW

For a complete wiring diagram Refer to Section 8W

ENGINE ELECTRICAL DIAGNOSTICS - GPEC

9 - 37

•

When Monitored:
With the engine running and battery voltage greater than 10.4 volts.

•

Set Condition:
The PCM detects that the Oxygen Sensor 1/1 circuit is shorted low.

Possible Causes

INTERMITTENT DTC

(K99) O2 1/1 HEATER CONTROL CIRCUIT SHORTED TO GROUND

(K99) O2 1/1 HEATER CONTROL CIRCUIT OPEN OR HIGH RESISTANCE

(Z916) GROUND CIRCUIT OPEN OR HIGH RESISTANCE

OXYGEN SENSOR 1/1

POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

Diagnostic Test

DTC IS ACTIVE

Ignition on, engine not running.

With the scan tool, Clear DTCs in the Powertrain Control Module (PCM).

Start the engine and allow it to reach normal operating temperature.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands
near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in
personal injury or death.
With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

>> Go to 2

>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -

DIAGNOSIS AND TESTING)

(Z916) GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Turn the ignition off.

Disconnect the Oxygen Sensor 1/1 connector.

Turn the ignition on.

Using a 12 volt test light connected to 12 volts, check the (Z916)
Ground circuit in the Oxygen Sensor 1/1 harness connector.

NOTE: The test light should be illuminated and bright. Compare
the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes

>> Go to 3

>> Repair the (Z916) Ground circuit for an open circuit or high

resistance.

Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).

9 - 38

ENGINE ELECTRICAL DIAGNOSTICS - GPEC

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