DTC P162D
Diagnostic Instructions
DTC Descriptor
DTC P162D: Evaporative Emission (EVAP) System Alarm Clock Signal Not Received
Circuit/System Description
The wake up signal circuit is energised by the hybrid powertrain control module 2 to immediately activate other control modules connected to this circuit when the body control module (BCM) signals the powertrain control module 2 that serial data is required.
Depending on the option content, control modules that may receive the wake up signal are as follows:
| • | Battery Energy Control Module (BECM) |
| • | Electronic Brake Control Module (EBCM) |
| • | Transmission Control Module (TCM) |
| • | Engine Control Module (ECM) |
Conditions for Running the DTC
| • | DTC's P0502, P0503, P0722, P0723, P2610, U182D, U0073, U0074 or P2537 is not set. |
| • | The vehicle power mode master requires serial data communication to occur. |
| • | The hybrid powertrain control module 2 attempts to wake up the control modules connected to its control module output wake up circuit. |
| • | A service bay test is not active |
Conditions for Setting the DTC
At Propulsion System Active, if the ECM did not receive feedback from the hybrid powertrain control module 2 that the alarm clock was set, and any one of the three wake-up timer events did not occur, then the DTC fails.
Action Taken When the DTC Sets
| • | DTC P162D is a type B DTC. |
| • | The control modules are never signaled; therefore the specific subsystems will not function. |
| • | The vehicle will not start while the circuit is shorted to ground. |
| • | The MIL will illuminate after the 2nd ignition cycle, along with several DIC messages. |
Conditions for Clearing the DTC
DTC P162D is a type B DTC.
Diagnostic Aids
Short to ground will also set multiple no communication codes for high speed GMLAN control modules.
Reference Information
Schematic Reference
Connector End View Reference
Component Connector End Views
Description and Operation
Data Link Communications Description and Operation
Hybrid Modes of Operation Description
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Special Tools
EL-48900
For equivalent regional tools, refer to Special Tools .
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
| • | Identify how to disable high voltage. |
| • | Identify how to test for the presence of high voltage. |
| • | Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed. |
| • | Safety glasses with appropriate side shields when within 15 metres (50 feet) of the vehicle, either indoors or outdoors. |
| • | Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors. |
| - | Visually and functionally inspect the gloves before use. |
| - | Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energised or not. |
Note: Use the schematic to identify the following:| • | The control modules that share the K114B hybrid powertrain control module 2 terminal 69 X2 accessory wake-up serial data 2 circuit |
| • | The control module B+, ignition, ground, communication enable and serial data circuit terminals |
- Vehicle OFF, disconnect the X2 harness connectors at the K114B hybrid powertrain control module 2.
- Vehicle OFF, all systems OFF, all keys at least 3 metres away from vehicle, all access doors closed. It may take up to 2 minutes for all vehicle systems to power down. Test for greater than 100 Ω, but less than infinite resistance, between the accessory wake-up serial data 2 circuit terminal 69 X2 and ground.
| ⇒ | If less than the specified range, refer below to Testing the Accessory Wake-Up Serial Data 2 Circuits for a Short to Ground. |
| ⇒ | If infinite resistance, test the accessory wake-up serial data 2 circuit for an open/high resistance. |
- Verify that a test lamp illuminates between each B+ circuit terminal and ground.
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, replace the K114B hybrid powertrain control module 2. |
- Verify that a test lamp illuminates between each ignition circuit terminal and ground.
| ⇒ | If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, replace the K114B hybrid powertrain control module 2. |
- If the circuits test normal, replace the K114B hybrid powertrain control module 2.
Testing the Accessory Wake-Up Serial Data 2 Circuits for a Short to Ground
- Perform the High Voltage Disabling procedure before proceeding with this diagnostic. Refer to High Voltage Disabling .
- Reconnect the 12 V battery.
- Vehicle OFF, disconnect the harness connector at an easily accessible control module that shares the K114B hybrid powertrain control module 2 terminal 69 X2 accessory wake-up serial data 2 circuit.
- Test for less than 100 Ω between the K114B hybrid powertrain control module 2 accessory wake-up serial data 2 circuit terminal 69 X2 and ground.
| ⇒ | If greater than the specified range, replace the control module that was just disconnected. |
- Repeat step 1 until all control modules on the K114B hybrid powertrain control module 2 accessory wake-up serial data 2 circuit terminal 69 X2 have been disconnected.
- Repair the short to ground on the accessory wake-up serial data 2 circuit.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control module replacement, programming and setup.
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