Control Unit Input Test
NOTE:
Before testing, troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test Mode A (see
TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
).
- Turn the ignition switch OFF.
- Remove the driver's dashboard undercover (see DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ), and the driver's dashboard lower cover (see DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION ).
- Disconnect the connectors (A) from the keyless access control unit (B).NOTE: All connector views are wire side of female terminals. A
- Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary and recheck the system.
- If the terminals look OK, go to step 5.
- With the connectors still disconnected, make these input tests at the connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 6.WIRE CAVITY CHART
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A5 RED Ignition switch ON (ID Attach to ground: The immobilizer indicator should come on. - Faulty gauge control module
- An open in the wire
A31 GRN Ignition switch ON (II) Attach to ground: The keyless access indicator should come on. - Faulty gauge control module
- An open in the wire
- Reconnect the connectors to the keyless access control unit, and make these input tests at the connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the control unit must be faulty; replace it.WIRE CAVITY CHART
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A9 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. - Poor ground (G501)
- An open in the wire
A21 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. - Poor ground (G501)
- An open in the wire
A1 YEL Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. - Blown No. 19(20 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
A2 PUR Ignition switch ACC (I) Measure the voltage to ground: There should be battery voltage. - Blown No. 32 (10 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
A10 WHT Under all conditions Measure the voltage to ground: There should be battery voltage. - Blown No. 6 (7.5 A) fuse in the driver's under-dash fuse/relay box
- Blown No. 15 (40 A) fuse in the under-hood fuse/relay box
- An open in the wire
A22 WHT Under all conditions Measure the voltage to ground: There should be battery voltage. - Blown No. 15(40 A) fuse in the under-hood fuse/relay box
- Blown No. 7 (10 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
A14 ORN Parking brake pedal pressed Measure the voltage to ground: There should be less than 1 V. - Faulty parking brake switch
- An open in the wire
Parking brake pedal released Measure the voltage to ground: There should be 5 V or more. - Faulty parking brake switch
- A short to ground in the wire
B1 LT BLU Trunk lid outer handle switch pulled Measure the voltage to ground: There should be less than 1 V. - Poor ground (G701)
- Faulty trunk lid outer handle switch
- An open in the wire
Trunk lid outer handle switch released Measure the voltage to ground: There should be 5 V or more. - Faulty trunk lid outer handle switch
- A short to ground in the wire