B1571
CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: B1571: Manual (SOS) Switch Green Indicator Malfunction
B1571 - Manual (SOS) Switch Green Indicator Malfunction
DESCRIPTION
This DTC is stored when the DCM (Telematics Transceiver) detects an open or short in the manual (SOS) switch green indicator circuit of the manual (SOS) switch. The manual (SOS) switch green indicator illuminates after the ignition switch is turned to ON.
If the Safety Connect is not active, the manual (SOS) switch green indicator will turn off.
If the Safety Connect is active, the manual (SOS) switch green indicator will blink while in communication with the call center.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK FOR DTC
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON and wait for 10 seconds.
(d) Perform "Health Check" and check for current DTCs Health Check.
Result
B -- INSPECT MAP LIGHT ASSEMBLY (MANUAL [SOS] SWITCH GREEN INDICATOR CONDITION)
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (DCM - MAP LIGHT)
(a) Disconnect the F39 DCM (Telematics Transceiver) connector.
(b) Disconnect the U2 map light assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (MAP LIGHT - BODY GROUND)
(a) Remove the map light assembly with the connector connected Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT MAP LIGHT ASSEMBLY (GREEN INDICATOR)
(a) Disconnect the U2 map light assembly connector.
(b) Connect 2 dry-cell batteries (1.5 V each) in series.
(c) Connect a positive (+) lead to of the battery terminal U2-18 (IND2) and a negative (-) lead to terminal U2-16 (GND) of the map light assembly connector.
(d) Check if the manual (SOS) switch green indicator comes on.
OK:
Green indicator comes on.
Text in Illustration
NG -- REPLACE MAP LIGHT ASSEMBLY Removal
OK -- Continue to next step.
5. INSPECT MAP LIGHT ASSEMBLY (MANUAL [SOS] SWITCH GREEN INDICATOR CONDITION)
(a) Confirm the green indicator status after the ignition is turned to switch ON System Description.
Result
B -- REPLACE DCM (TELEMATICS TRANSCEIVER)
A -- Continue to next step.
6. CHECK MAP LIGHT ASSEMBLY (GREEN INDICATOR INPUT VOLTAGE)
(a) Remove the map light assembly with the connector connected Removal.
(b) Set a voltmeter to the map light assembly connector terminals, connect a positive (+) lead to terminal U2-18 (IND2) and a negative (-) lead to terminal U2-16 (GND).
(c) Measure the voltage.
OK:
1.0 to 8.5 V in 2 seconds after the ignition switch is turned to ON and the red indicator has subsequently turned off.
0 V when the ignition switch is turned off.
Text in Illustration
NG -- CHECK DCM (TELEMATICS TRANSCEIVER) (GREEN INDICATOR OUTPUT VOLTAGE)
OK -- REPLACE MAP LIGHT ASSEMBLY Removal
7. CHECK DCM (TELEMATICS TRANSCEIVER) (GREEN INDICATOR OUTPUT VOLTAGE)
(a) Remove the DCM (Telematics Transceiver) with the connectors connected Removal.
(b) Set a voltmeter to the DCM (Telematics Transceiver) connector terminals, connect a positive (+) lead to terminal F39-12 (IND2) and a negative (-) lead to body ground.
(c) Measure the voltage.
OK:
1.0 to 8.5 V in 2 seconds after the ignition switch is turned to ON and the red indicator has subsequently turned off.
0 V when the ignition switch is turned off.
Text in Illustration
NG -- CHECK HARNESS AND CONNECTOR (DCM - BODY GROUND)
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR
8. CHECK HARNESS AND CONNECTOR (DCM - BODY GROUND)
(a) Remove the DCM (Telematics Transceiver) with the connectors connected Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. REPLACE DCM (TELEMATICS TRANSCEIVER)
(a) Replace the DCM (Telematics Transceiver) Removal.
NOTICE:
* The ignition switch must be off.
* Do not replace the DCM (Telematics Transceiver) with one from another vehicle.
NEXT -- PERFORM DCM ACTIVATION DCM Activation