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Section 3-105 shows A-12 as a system groundI followed chart A-1 and the test light stays on. Also when i ground the crkt via the ecm myself the ses comes on. Are there any other ecm ground than the one on the thermostat housing?
HYE what do you mean by ALDL? A-1 is a green and white wire on my truck leading to the fuel pump relay.Section 3-105 shows A-12 as a system ground
D-1 as a system ground
D-1 should be the ground at the Tstat. It is a Tan wire with a white tracer
A-1 is terminal A in the ALDL. it is a black wire with a white tracer.
Assembly line data link.HYE what do you mean by ALDL? A-1 is a green and white wire on my truck leading to the fuel pump relay.
If you run the entire diagnostic chart A-2 and get to the end you will know if it is the ECM or the PROMthe chart says ses light on yes or no its a no and then refers to chart A-1 or how can i check if the prom/mem-cal is faulty?