Qt: Powertrain Control Module (Pcm)/Secondary On Board Diagnostic Module (SOBDMC) Quick Test

QT1 CARRY OUT THE NETWORK TEST

WARNING: TO PREVENT THE RISK OF HIGH-VOLTAGE SHOCK, ALWAYS FOLLOW PRECISELY ALL WARNINGS AND SERVICE INSTRUCTIONS, INCLUDING INSTRUCTIONS TO DEPOWER THE SYSTEM. THE HIGH-VOLTAGE HYBRID SYSTEM UTILIZES APPROXIMATELY 300 VOLTS DC, PROVIDED THROUGH HIGH-VOLTAGE CABLES TO ITS COMPONENTS AND MODULES. THE HIGH-VOLTAGE CABLES AND WIRING ARE IDENTIFIED BY ORANGE HARNESS TAPE OR ORANGE WIRE COVERING. ALL HIGH-VOLTAGE COMPONENTS ARE MARKED WITH HIGH-VOLTAGE WARNING LABELS WITH A HIGH-VOLTAGE SYMBOL. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN SERIOUS PERSONAL INJURY OR DEATH.

Carry out all the safety steps required to run the vehicle tests.
Complete the preliminary checks looking for obvious concerns that may relate to the symptom. Check items such as those listed:
- fuses
- electrical circuits and connectors
- vacuum lines (leaks, routing)
- intake air system (leaks, restrictions)
- fuel quality
- engine cooling system (engine operating at correct temperature)
- motor electronics cooling system
Access any related OASIS or TSB information.
Carry out the network test.

Does the network test pass?

Yes	No
GO to QUICK TEST QT2 .	For only the PCM has a communication concern, GO to PINPOINT TEST QA . For only the SOBDMC has a communication concern, GO to PINPOINT TEST QD . For all others, GO to the Module Communications Network article, to diagnose the network concern.

QT2 CARRY OUT THE PCM AND SOBDMC QUICK TEST

NOTE: Make sure the low voltage battery is fully charged and the low voltage system is operating correctly. Low voltage concerns may be a possible cause of a DTC.

NOTE: Do not carry out consecutive quick tests without turning the ignition to OFF position for a minimum of 15 seconds.

Complete the PCM quick test to access any DTCs. Note any key ON engine OFF (KOEO), key ON engine running (KOER) (if engine runs) and continuous memory (MIL and non-MIL) DTCs.
Complete the SOBDMC quick test to access any DTCs. Note any KOEO and continuous memory DTCs.

Are any PCM or SOBDMC DTCs present?

Yes	No
GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS for direction to REPAIR any DTCs after noting the following: DIAGNOSE the PCM circuit related DTCs first. For multiple circuit DTCs that are set as a result of a concern with more than one component, REFER to the OEM Electrical Wiring Diagram Introduction and identify the common cause such as SIGRTN, VREF, or VPWR. DIAGNOSE the SOBDMC circuit related DTCs before system related range or performance DTCs. For multiple circuit DTCs that are set as a result of a concern with more than one component, REFER to the OEM Electrical Wiring Diagram Introduction and identify the common cause such as SIGRTN, VREF, or VPWR.	GO to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX for direction to the correct symptom chart in NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHARTS . NOTE: If the symptom is not listed, REFER to the applicable Service Information or GO to PINPOINT TEST Z (for intermittent PCM or SOBDMC system diagnostics).

Yes

GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS for direction to REPAIR any DTCs after noting the following:
DIAGNOSE the PCM circuit related DTCs first. For multiple circuit DTCs that are set as a result of a concern with more than one component, REFER to the OEM Electrical Wiring Diagram Introduction and identify the common cause such as SIGRTN, VREF, or VPWR.
DIAGNOSE the SOBDMC circuit related DTCs before system related range or performance DTCs. For multiple circuit DTCs that are set as a result of a concern with more than one component, REFER to the OEM Electrical Wiring Diagram Introduction and identify the common cause such as SIGRTN, VREF, or VPWR.

GO to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX for direction to the correct symptom chart in NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHARTS .

NOTE: If the symptom is not listed, REFER to the applicable Service Information or GO to PINPOINT TEST Z (for intermittent PCM or SOBDMC system diagnostics).