Mazda 1996 626 Service Manual page 399

Flowchart No.2 Symptom
Possible cause
• Burnt ROOM 15A fuse
• Burnt DOOR LOCK 30A fuse
• Damaged keyless unit
• Damaged CPU
• Damaged transmitter
KEYLESS ENTRY SYSTEM
Keyless entry system does not function (Trunk)
Damaged trunk lid opener relay
Damaged trunk lid actuator
Open or short circuit in wiring harness
Poor connection of connector
Step 1
Check the ROOM 15A fuse in the fuse block.
Fuse
OK
Burnt
Step 2
. Open the trunk lid.
1
. Measure the voltage at the (L/R) terminal wire of the
2
keyless unit connector in the trunk compartment.
Voltage
B+
Other
Step 3
1. Disconnect the keyless unit connector.
2. Check for continuity between the (B) terminal wire and
ground.
Continuity
Yes
No
Step 4
Measure the voltage at terminal wire
CPU connector.
Voltage
5 V
Other
Action
Go to Step 2
Replace fuse after checking and repairing wiring
harness
B+: Battery positive voltage
Action
Go to Step 3
Repair wiring harness
(ROOM 15A fuse— Keyless unit)
Action
Reconnect connector and go to Step 4
Repair wiring harness
(Keyless unit—-GND)
Action
Go to Step 5
Check CPU (Refer to section Z3)
K3
R (R/Y) of the
2
K 3 -9