ELECTRICAL 179 ELECTRICAL STEP FOR DIAGNOSING IMMOBILIZER CAN FAILURE: 1 Disconnect the battery before measuring the resistance 2 Measure the resistance in the diagnostic connector between following pins CAN_H (6) & CAN_L (14) CAN_H(6) and GND(5) CAN_L(14) and GND(5) CAN_H (6) and Vbatt (EMS Pin no. B1/B3/B5) CAN_L (14) and Vbatt (EMS Pin no. B1/B3/B5) Value Status Value Status Value Status Value Status Value Status 2.1 60Ω- 70Ω OK >1KΩ Range OK >1KΩ Range OK >1KΩ Range OK >1KΩ Range OK 2.2 0Ω20Ω Short circuit between CAN_H and CAN_L 0Ω20Ω Short circuit between CAN_H and GND 0Ω-20Ω Short circuit between CAN_L and GND 0Ω-20Ω Short circuit between CAN_H and Vbatt 0Ω-20Ω Short circuit between CAN_L and Vbatt 2.3 110Ω130Ω Either EMS or BCM is not connected or open circuit on main CAN bus - - - - - - - - 2.4 >1KΩ Range EMS and BCM both are disconnected. - - - - - - - - 2.5 >1MΩ Range 1. Check continuity between CAN_H(6) CAN_H(B53) on EMS ECU 2. Check continuity between CAN_L(14) CAN_L(B54) on EMS ECU >1MΩ Range 1. Check continuity between CAN_H (6) with CAN_H (B53) on EMS ECU. 2.Check continuity between GND(5) with GND(B2/ B4/B6) on EMS ECU >1MΩ Range 1. Check continuity between CAN_L (14) with CAN_L (B54) on EMS ECU. 2. Check continuity between GND(5) GND(B2/ B4/B6) on EMS ECU >1MΩ Range 1. Check continuity between CAN_H (6) CAN_H (B53) on EMS ECU. >1MΩ Range 1. Check continuity between CAN_L (14) with CAN_L (B54) on EMS ECU.
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