Pinpoint Test 5
PINPOINT TEST 5: NO INTERNATIONAL STANDARDS ORGANIZATION (ISO) 9141 NETWORK COMMUNICATIONStep 1 - 4:
Step 5 - 7:
Normal Operation
The RCM communicates with the diagnostic tool through the ISO 9141 communications network circuit (LB/W). If circuit (LB/W) becomes open or shorted to ground, communications to those modules will not be possible. Check circuit (LB/W) between the RCM 0810-101 and the DLC D-01. Total resistance values must not be more than 5 Ohms. If the resistance is more than 5 Ohms there is an open in circuit (LB/W), damage to the DLC D-01, damage to the RCM or a problem in one of the in-line connectors. If, after individual checks of each circuit leading to a module show resistance values less than 5 Ohms and no in-line connector issues present, the data link diagnostics test must be run with the module in question disconnected. If the data links diagnostics test passes with the module in question disconnected, the module is the source of the concern. A new module should be installed.
Possible Causes
- ISO 9141 network circuit (LB/W) shorted to ground or open
- DLC D-01
- RCM
- ABS module