DTC P0380, P0383, or P0384
Diagnostic Instructions
DTC Descriptors
| DTC P0380 00: Glow Plug Feedback Circuit
Malfunction |
| DTC P0383 02: Glow Plug Control Module Control
Circuit Short to Ground |
| DTC P0384 00: Glow Plug Control Module Control
Circuit Malfunction |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
B+
|
P0380 00
|
P0380 00
|
P0380 00
|
P0380 00
|
Ignition
|
P0380 00
|
P0380 00
|
P0380 00
|
P0380 00
|
Signal
|
P0383 02
|
P0383 02
|
P0384 00
|
P0380 00
|
Ground
|
—
|
—
|
—
|
P0380 00
|
|
| |
Circuit/System Description
The glow plug controller is a solid state device which operates
the glow plugs. The temperature and the power consumption is
controlled between the engine control module (ECM) and the glow
plug controller within a wide range to suit the engines pre-heating
requirements. The ECM controls the glow plug module with a
pulse-width modulated (PWM) control circuit. The glow plug initial
ON time will vary based on the system voltage and temperature.
Lower temperatures cause longer ON times.
Conditions for Running the DTC
P0380 00
| • |
The ignition voltage is
between 9–16 V. |
| • |
The DTCs run once per ignition
cycle when the above conditions are met. |
P0383 02 or P0384 00
| • |
The ignition voltage is
between 9–16 V. |
| • |
The DTCs run once per ignition
cycle when the above conditions are met. |
Conditions for Setting the DTC
The ECM detects an open, short to ground, or a short to voltage
on the glow plug module control circuit for greater than 0.5 s.
Action Taken When the DTC Sets
DTC P0380, P0383 and P0384 are Type C DTCs.
Conditions for Clearing the DTC
DTC P0380, P0383 and P0384 are Type C DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Ignition ON, observe the DTC
information with a scan tool. DTC P0380, P0383 or P0384 should not
set. |
| 2. |
Operate the vehicle within the
Conditions for Running the DTC to verify the DTC does not reset.
You may also operate the vehicle within the conditions that you
observed from the Freeze Frame/Failure Records data. |
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
harness connector X1 at the K34 Glow Plug Control Module.
|
| 2. |
Test for less than 5 Ω
between the ground circuit terminal 3 and ground. |
| ⇒ |
If greater than the specified range, test the
ground circuit for an open/high resistance. |
| 3. |
Connect a test lamp between
the B+ circuit terminal 5 and ground. |
| ⇒ |
If the test lamp is OFF, test the B+ circuit for a
short to ground or an open/high resistance. |
| 4. |
Ignition ON, connect a test
lamp between the ignition circuit terminal 4 and ground.
|
| ⇒ |
If the test lamp is OFF, test the ignition circuit
for a short to ground or an open/high resistance. |
| 5. |
Test for 9.5–10.5 V
between the signal circuit terminal 1 and ground. |
| ⇒ |
If greater than the specified range, test the
signal circuit for a short to voltage. |
| ⇒ |
If less than the specified range, test the signal
circuit for a short to ground or an open/high resistance. |
| 6. |
If all circuit tests normal,
replace the K34 Glow Plug Control Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
