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NO. 2 ALL ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE

BME090369000204
• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly and undamaged.

2 | All on-board diagnostic functions inoperative
DESCRIPTION | • Malfunction in keyless unit power supply circuit, or keyless unit ground circuit.
POSSIBLE CAUSE | • Malfunction in IG1, B+ signal circuit of keyless unit

  - Keyless unit power supply fuse malfunction
  - Malfunction in wiring harness between keyless unit power supply fuse(s) and keyless unit itself

• Malfunction in the keyless unit door open/closed signal circuit

  - Door switch system malfunction
  - Keyless unit malfunction
  - Malfunction in the wiring harness between the keyless unit and the door switch

• Malfunction in keyless unit GND signal circuit

  - Malfunction in the wiring harness between the keyless unit and ground

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT KEYLESS UNIT POWER SUPPLY FUSES • Are the keyless unit power supply fuses okay? | Yes | Go to the next step.
No | Inspect for short to ground on blown fuse circuit. Repair or replace if necessary. Install appropriate amperage fuse.
2 | INSPECT DOOR SWITCH INSTALLATION • Are the door switches installed securely? | Yes | Go to the next step.
No | Install the door switch(es) securely, then go back to Step 5 of keyless entry system preliminary inspection.
*3 | CHECK TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (LACK OF CONTINUITY BETWEEN FUSE BLOCK AND KEYLESS UNIT) OR ELSEWHERE • Turn the ignition switch to ON position. • Measure the voltage at following keyless unit terminals or short cord terminals:

  - IG1 signal (Terminal A)
  - B+ signal (Terminal B)

• Are the voltages B+?
Yes
Go to the next step.
No | Repair the wiring harness between the fuse block and the keyless unit, then go to Step 8.
*4 | CHECK TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (SHORT TO B+ BETWEEN FUSE BLOCK AND KEYLESS UNIT, OR BETWEEN KEYLESS UNIT AND GROUND) OR ELSEWHERE • Turn the ignition switch to LOCK position. • Disconnect the keyless unit connector. • Measure the voltage at following keyless unit terminal or short cord terminal:

  - IG1 signal (Terminal A)

• Is the voltage B+?
Yes
Repair malfunctioning wiring harness, then go to Step 8.
No | Go to the next step.
*5 | CHECK TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (LACK OF CONTINUITY BETWEEN KEYLESS UNIT AND GROUND) OR ELSEWHERE • Is there continuity between keyless unit terminal L or short cord terminal L and ground? | Yes | Go to the next step.
No | Repair the wiring harness between the keyless unit and ground, then go to Step 8.
6 | CHECK FOR CHECK CODE 04 IN INSTRUMENT CLUSTER • Inspect the door switch using instrument cluster input/output check mode. See INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE • Does DTC 04 function properly? | Yes | Go to the next step.
No | Repair door switch system using DTC 04 inspection procedure, then go to Step 8.
7 | INSPECT KEYLESS UNIT OR WIRING HARNESS (BETWEEN KEYLESS UNIT AND DOOR SWITCHES, CARGO COMPARTMENT LIGHT SWITCH FOR CONTINUITY) • Open the driver-side door. • Is there continuity between keyless unit terminals C or short cord terminal C and ground? | Yes | Replace the keyless unit and reprogram keyless unit ID code, then go to the next step.
No | Repair the wiring harness between the keyless unit and the door switch(es), then go to the next step.
8 | RECHECK MALFUNCTION SYMPTOM AFTER REPAIR • Does keyless entry system operate properly? | Yes | Troubleshooting completed. Explain repairs to customer.
No | Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.