DTC P066A, P066C, P066E, or P067A
Diagnostic Instructions
DTC Descriptors
| DTC P066A 00: Cylinder 1 Glow Plug Control
Circuit Low Voltage |
| DTC P066C 00: Cylinder 2 Glow Plug Control
Circuit Low Voltage |
| DTC P066E 00: Cylinder 3 Glow Plug Control
Circuit Low Voltage |
| DTC P067A 00: Cylinder 4 Glow Plug Control
Circuit Low Voltage |
Circuit/System Description
This DTC applies to internal microprocessor integrity conditions
within the glow plug control module.
Conditions for Running the DTC
| • |
The battery voltage is between
9-16 V. |
| • |
The DTC runs once per ignition
cycle when the above condition is met. |
Conditions for Setting the DTC
The ECM detects a glow plug control module malfunction.
Action Taken When the DTC Sets
DTCs P066A, P066C, P066E and P067A are Type A DTCs.
Conditions for Clearing the DTC
DTCs P066A, P066C, P066E and P067A are Type A 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 OFF, disconnect the
harness connector at the K34 Glow Plug Control Module. |
| 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 at the K34 Glow Plug Control Module. |
| 2. |
Test for less than 5 Ω
of resistance between the earth circuit terminal 3 and
earth. |
| ⇒ |
If greater than the specified range, test the
ground circuit for an open/high resistance. |
| 3. |
Test for greater than 0.3
Ω of resistance between each of the glow plug circuit
terminals and ground. |
| |
• |
E12A Glow Plug 1 circuit
terminal 3 |
| |
• |
E12B Glow Plug 2 circuit
terminal 1 |
| |
• |
E12C Glow Plug 3 circuit
terminal 4 |
| |
• |
E12D Glow Plug 4 circuit
terminal 6 |
| ⇒ |
If less than the specified range, test the glow
plug circuit for a short to ground. If the circuit tests normal,
replace the Glow Plug. |
| 4. |
Ignition ON, verify a test
lamp illuminates between the ignition voltage circuit terminal 4
and ground. |
| ⇒ |
If the test lamp does not illuminate, test the
ignition voltage circuit for a short to ground or an open/high
resistance. |
| 5. |
If all circuits test normal,
replace the K34 Glow Plug Control Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
