12
J1587 DIAGNOSTIC
12 1 J1587 diagnostics shorted or open • Check for corroded/damaged wiring or connectors 250 3, 4, 5
between the ECU and J1587 Diagnostic. or 12
• Verify the following:
- At the 18-pin ECU harness connector:
(a) Continuity of the J1587 Diagnostic wiring to the
lamp (auxiliary device).
(b) +12V is not measured at J1587 Diagnostic lead.
- At J1587 Diagnostic connector:
(a) No continuity of the J1587 Diagnostic lead to
ground.
(b) No continuity from J1587 Diagnostic lead to any
other ECU pin(s).
(c) Replace/repair J1587 Diagnostic wiring or
components as required.
TRAILER-MOUNTED ABS INDICATOR LAMP
13 1 ABS lamp shorted or open • Check for corroded/damaged wiring or connectors 81 3, 4, 5
between the ECU and ABS Indicator Lamp. or 12
• Verify the following:
- At the 5-pin or 18-pin ECU harness connector:
(a) Continuity of the ABS Indicator Lamp wiring
to the lamp (auxiliary device).
(b) +12V is not measured at ABS Indicator Lamp lead.
- At ABS Indicator Lamp connector:
(a) No continuity of the ABS Indicator Lamp lead to
ground.
(b) No continuity from ABS Indicator Lamp lead to any
other ECU pin(s).
(c) Replace/repair ABS Indicator Lamp wiring or
components as required.
1st 2nd Fault Description Repair Information J1587 J1587
Digit Digit (SID) (FMI)
Diagnostic Trouble Codes (DTCs) (continued)
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