DTC P064C
Diagnostic Instructions
DTC Descriptors
| DTC P064C 00: Glow Plug Control Module
Performance |
| DTC P064C 04: Glow Plug Control Module
Performance |
| DTC P064C 54: Glow Plug Control Module
Performance |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
B+
|
P064C 04, P0380 00
|
P064C 04, P0380 00
|
P0380 00
|
P0380 00
|
Ignition
|
P0380 00
|
P0380 00
|
P0380 00
|
P0380 00
|
Control
|
P064C 00, P064C 54
|
P064C 00
|
P064C 00
|
P0380 00, P064C 54
|
Ground
|
-
|
-
|
-
|
P0380 00
|
|
| |
Circuit/System Description
The glow plug control module 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 control module within a wide range to suit the engine
pre-heating requirements. The ECM controls the glow plug control
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
| • |
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 P064C is a Type C DTCs.
Conditions for Clearing the DTC
DTC P064C is a 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 P064C 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 earth circuit terminal 3 X1 and earth. |
| ⇒ |
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 X1 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 X1 and ground.
|
| ⇒ |
If the test lamp is OFF, test the ignition circuit
for a short to ground or an open/high resistance. |
| 5. |
Ignition OFF, disconnect the
harness connector X2 at the K20 Engine Control Module. |
| 6. |
Ignition ON, test for less
than 0.3 V between the control circuit terminal 2 X1 and
ground. |
| ⇒ |
If greater than the specified range, test the
signal circuit for a short to voltage. |
| 7. |
Ignition OFF, test for greater
than 500 kΩ between the K34 Glow Plug Control Module control
circuit terminal 2 X1 and earth. |
| ⇒ |
If less than the specified range, test the signal
circuit for a short to ground. |
| 8. |
Test for less than 5 Ω
between the control circuit terminal 2 X1 at the K34 Glow Plug
Control Module harness connector and terminal 42 X2 at the K20
Engine Control Module harness connector. |
| ⇒ |
If greater than the specified range, test the
signal circuit for an open/high resistance. |
| 9. |
If the circuit tests normal,
replace the K34 Glow Plug Control Module. |
| 10. |
Verify the DTC does not
reset. |
| ⇒ |
If DTC is set, replace the K20 Engine Control
Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
