Milan FWD L4-2.3L (2008)
Information Bus: Initial Inspection and Diagnostic Overview
Inspection and Verification
INSPECTION AND VERIFICATION
1. Verify the customer concern.
2. Visually inspect for obvious signs of electrical damage.
VISUAL INSPECTION CHART
Electrical
-
Battery junction box (BJB) fuse(s):
-
11 (30A) (no communication with dual climate control seat module [DCSM])
-
12 (30A) (no communication with DCSM)
-
15 (10A) (no communication with driver seat module [DSM])
-
16 (15A) (no communication with transmission control module [TCM])
-
19 (40A) (no communication with smart junction box [SJB])
-
20 (20A) (no communication with audio digital signal processing [DSP] module)
-
21 (20A) (no communication with DSP module)
-
23 (10A) (no communication with TCM-FNR5 transaxle, PCM)
-
23 (10A) (no communication with the PCM)
-
26 (7.5A) (no communication with the PCM)
-
42 (15A) (no communication with the PCM, 3.0L and 3.5L engines)
-
47 (15A) (no communication with the PCM, 2.3L engine)
-
SJB fuse(s):
-
12 (7.5A) (no communication with audio control module [ACM])
-
13 (10A) (no communication with accessory protocol interface module [APIM], instrument cluster [IC], heating ventilation air
conditioning [HVAC] module)
-
18 (20A) (no power to scan tool, no communication with ACM)
-
20 (7.5A) (no communication with driver door module [DDM], satellite digital audio receiver system [SDARS] module, 4X4 control
module
-
23 (7.5A) (no communication with IC)
-
24 (7.5A) (no communication with occupant classification system module [OCSM])
-
25 (7.5A) (no communication with restraints control module [RCM])
-
26 (7.5A) (no communication with TCM, PCM)
-
27 (7.5A) (no communication with HVAC module, IC)
-
28 (10A) (no communication with ABS module, 4X4 control module, PAM)
-
Data link connector (DLC)
-
Wiring harness
-
Wiring, terminals or connectors
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. NOTE: Make sure to use the latest scan tool software release.
If the cause is not visually evident, connect the scan tool to the DLC.
NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
If the scan tool does not communicate with the VCM:
-
Check the VCM connection to the vehicle.
-
Check the scan tool connection to the VCM.
-
GO to Pinpoint Test V, to diagnose no power to the scan tool. See: Pinpoint Tests/Test V: No Power To The Scan Tool
5. NOTE: During the network test, the scan tool will first attempt to communicate with the PCM, after establishing communication with the PCM,
the scan tool will then attempt to communicate with all other modules on the vehicle.
Carry out the network test.
-
If the network test passes, retrieve and record the continuous memory DTCs and proceed to Step 6.
-
If the network test fails, GO to Symptom Chart to identify the module not communicating. See: Symptom Related Diagnostic Procedures
6. NOTE: Follow the non-network DTC diagnostics (BXXXX, CXXXX, PXXXX) prior to the network DTC diagnostics (UXXXX).
