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Symptom: SYSTEM UNDERVOLTAGE When Monitored and Set Condition: SYSTEM UNDERVOLTAGE When Monitored: Always monitored with system active at each ignition cycle. Set Condition: Ignition voltage falls below 8.5 volts with the engine rpm greater than 2000 rpm for 60 seconds. POSSIBLE CAUSES ENGINE CHARGING SYSTEM DTC’S PRESENT TRANSMISSION RELAY OUTPUT LO AT TCM TCM - SYSTEM UNDER VOLTAGE TEST ACTION APPLICABILITY 1 NOTE: Low fluid level can be the cause of many transmission problems. If t, read the engine DTCs. Check and repair all engine DTCs prior to performing transmission symptom diagnostics. t, read and record all Transmission DTCs. NOTE: Check connectors - Clean/repair as necessary. Poor pin to terminal All Continue 2 With the DRBIII t, read Engine DTC’s. Are there any Engine Charging System DTC’s present? All Yes → Refer to the Charging category and perform the appropriate symptom. No → Go To 3 109 TRANSMISSION - NAG1 |