Trouble Diagnosis

Work Flow:

WORK FLOW

NOTE:
- When LCU connectors are disconnected for more than 1 minute such as during trouble diagnoses, the "disconnected" data will be memorized by the BCM. (While BCM memorizes the "disconnected" data, IVMS communication diagnosis of CONSULT-II will display "PAST NO RESPONSE".) Therefore, after reconnecting the LCU connectors, erase the memory.
- To erase the memory, perform the procedure below.
Erase the memory with CONSULT-II or turn the ignition switch to "OFF" position and remove 7.5 A fuse [No. [14] located in the fuse block (J/B)].




GROUND CIRCUIT CHECK




POWER SUPPLY CIRCUIT CHECK

NOTE: CONSULT-II (data monitor) may be used to check for the ignition switch input (ACC, ON, START).

DATA LINES CIRCUIT CHECK




Data lines open circuit check

NOTE: When checking data line circuit, disconnect BCM and all LCU connectors.

1. Disconnect BCM and LCU connectors.
2. Check continuity between BCM and LCU terminals.

Data lines short circuit check




1. Disconnect BCM and all LCU connectors.
2. Check continuity between BCM terminal and body ground.




3. Check voltage between BCM terminal and body ground.