Mariner 2WD L4-2.5L (2009)
Information Bus: Pinpoint Tests
Pinpoint Test A: The PCM Does Not Respond To The Scan Tool
Communications Network
Pinpoint Tests
Pinpoint Test A: The PCM Does Not Respond To The Scan Tool
Refer to Wiring Diagram Set 14 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Module Communications Network for schematic and connector
information. See: Diagrams/Electrical Diagrams/Diagrams By Number
Refer to Wiring Diagram Set 23 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Electronic Engine Controls - 2.5L for schematic and connector
information. See: Diagrams/Electrical Diagrams/Diagrams By Number
Refer to Wiring Diagram Set 24 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Electronic Engine Controls - 3.0L for schematic and connector
information. See: Diagrams/Electrical Diagrams/Diagrams By Number
Normal Operation
The PCM communicates with the scan tool through the High Speed Controller Area Network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and
VDB05 (WH) (HS-CAN -) provide the network connection to the PCM. Voltage for the PCM is provided by circuit CBB28 (GY/VT) or SBB05
(GY/RD). Circuit GD122 (BK) provides ground.
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
ABS module
-
Accessory Protocol Interface Module (APIM)
-
4X4 control module (if equipped)
-
IC
-
PCM
-
RCM
-
PSCM
-
OCSM
-
TCM (Hybrid only)
-
BCM (Hybrid only)
PINPOINT TEST A: THE PCM DOES NOT RESPOND TO THE SCAN TOOL
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
-------------------------------------------------
A1 VERIFY WHETHER OTHER HS-CAN MODULES PASS THE NETWORK TEST
-
Ignition ON.
-
Enter the following diagnostic mode on the scan tool: Network Test.
-
In the left hand pane of the IDS network test display screen, verify whether any HS-CAN modules passed the network test.
-
Is the text "pass" or a DTC listed next to any of the following modules (if equipped): 4x4 control module, ABS module, Accessory
Protocol Interface Module (APIM), Battery Control Module (BCM), Instrument Cluster (IC), Occupant Classification System Module
(OCSM), Power Steering Control Module (PSCM), Restraints Control Module (RCM), Transmission Control Module (TCM) or PCM?
Yes
If "pass" or a DTC was listed next to the PCM, a network fault is not currently present. Go To Pinpoint Test R to diagnose an intermittent HS-CAN fault
condition. See: Pinpoint Test R: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, Communication Can Be
Intermittently
If "pass" or a DTC was listed next to one or more modules other than the PCM, GO to A2.