Breakdown Information
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RV: 2000 HR Ambassador DP, Cummins ISB engine with Banks Power System.
Symptom: On a 6700 mile trip out west, about ¾ thru the trip had dash “WARNING” light, loss of Exhaust temp. gauge and Boost gauge, engine went into “derate” mode (fastest I could go was about 45mph). Above symptoms occurred intermittently then went solid broke.
Cause: Fault code posted was 123, which is Intake Manifold Pressure Sensor circuit malfunction. When the Cummins computer detects problem in the above-mentioned circuit, it goes into “derate” mode in order to protect the engine. The Banks Ottomind is in circuit between pressure sensor and Cummins computer. Cabled around Ottomind black box and was able to make it back home with full power. Upon removing cover of Ottomind, discovered all sorts of road dirt on the circuit board. This, I feel, caused the demise of the black box.
Resolution: Replaced Banks Ottomind black box (not cheap either).
A word of caution to those with the Banks System installed on their units: check the location of the Ottomind box. Mine was located in the engine compartment (about 2 feet above the road) where it was exposed to moisture and road dirt. I installed the new box inside the coach under the bed where is free from moisture and road dirt.
Symptom: On a 6700 mile trip out west, about ¾ thru the trip had dash “WARNING” light, loss of Exhaust temp. gauge and Boost gauge, engine went into “derate” mode (fastest I could go was about 45mph). Above symptoms occurred intermittently then went solid broke.
Cause: Fault code posted was 123, which is Intake Manifold Pressure Sensor circuit malfunction. When the Cummins computer detects problem in the above-mentioned circuit, it goes into “derate” mode in order to protect the engine. The Banks Ottomind is in circuit between pressure sensor and Cummins computer. Cabled around Ottomind black box and was able to make it back home with full power. Upon removing cover of Ottomind, discovered all sorts of road dirt on the circuit board. This, I feel, caused the demise of the black box.
Resolution: Replaced Banks Ottomind black box (not cheap either).
A word of caution to those with the Banks System installed on their units: check the location of the Ottomind box. Mine was located in the engine compartment (about 2 feet above the road) where it was exposed to moisture and road dirt. I installed the new box inside the coach under the bed where is free from moisture and road dirt.
