Pinpoint Test C: A Single Illumination Source Is Inoperative
CAUTION:
Use the correct probe adaptor(s) when making measurements. Failure to use he correct probe adaptor(s) may damage the connector.
- C1 CHECK ILLUMINATION SOURCES
- Key in ON position.
- Place the headlamp switch in the PARKING LAMPS ON position.
- Rotate the instrument panel dimmer switch to the full illumination position.
- Observe the lighting.
- Are the illumination sources operating correctly?
- YES : The system is operating correctly at this time.
- NO
: If the exterior mirror control switch, the memory set switch, the LH door lock control switch, or the RH door lock control switch (fixed backlighting) are inoperative, go to C4 .
If the variable backlighting sources are inoperative, go to C2 .
- C2 CHECK THE VOLTAGE SUPPLY TO THE INOPERATIVE VARIABLE ILLUMINATION SOURCE
- Key in OFF position.
- Disconnect: Inoperative Illumination Source
- Key in ON position.
- Place the headlamp switch in the PARKING LAMPS ON position.
- Rotate the instrument panel dimmer switch to the full illumination position.
- Measure the voltage between the inoperative illumination source and ground as follows:
Component Connector-Pin Circuit Message center switch C253-6 1417 (LG/RD) Headlamp switch C205-2 1418 (LB/WH) Overhead console C930-14 1418 (LB/WH) Overhead console C930-6 1417 (LG/RD) Parking aid disable switch C2114-9 1417 (LG/RD) Adjustable pedal switch C2089-3 1417 (LG/RD) Power quarter window switch C2981-4 1417 (LG/RD) DVD player C949-3 1417 (LG/RD) Clock C2016-2 1418 (LB/WH) Illumination dimmer C2065-3 1418 (LB/WH) - Is the voltage greater than 10 volts?
- YES : Go to C3.
- NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
- C3 CHECK THE GROUND TO THE INOPERATIVE ILLUMINATION SOURCE
- Measure the resistance between the inoperative illumination source and ground as follows:
Component Connector-Pin Circuit Message center switch C253-3 1205 (BK) Headlamp switch C205-1 1205 (BK) Overhead console C930-4 1203 (BK/LB) Parking aid disable switch C2114-5 1205 (BK) Adjustable pedal switch C2089-2 1205 (BK) Power quarter window switch C2981-8 1205 (BK) DVD player C949-14 1205 (BK) Clock C2016-5 1205 (BK) Illumination dimmer C2065-8 1205 (BK) - Is the resistance less than 5 ohms?
- YES : INSTALL a new component in question. CLEAR the DTCs. REPEAT the self-test.
- NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
- Measure the resistance between the inoperative illumination source and ground as follows:
- C4 CHECK FOR VOLTAGE AT THE FIXED ILLUMINATION SOURCE
- Key in OFF position.
- Disconnect: Inoperative Illumination Source
- Key in ON position.
- Measure the voltage between the inoperative illumination source and ground as follows:
Component Connector-Pin Circuit Memory set switch C9023-3 1499 (PK/LG) LH door lock control switch C508b-5 1499 (PK/LG) RH door lock control switch C605-5 1499 (PK/LG) - Is the voltage greater than 10 volts?
- YES : VERIFY the SJB fuse 6 (5A) is OK. If OK, go to C5 .
- NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
- C5 CHECK THE GROUND TO THE INOPERATIVE ILLUMINATION SOURCE
- Measure the resistance between the inoperative fixed illumination source and ground as follows:
Component Connector-Pin Circuit Memory set switch C9023-4 1205 (BK) LH door lock control switch C508b-1 1205 (BK) RH door lock control switch C605-1 1205 (BK) - Is the resistance less than 5 ohms?
- YES : INSTALL a new component in question. CLEAR the DTCs. REPEAT the self-test.
- NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
- Measure the resistance between the inoperative fixed illumination source and ground as follows: