B1570
CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: B1570: Manual (SOS) Switch Red Indicator Malfunction
B1570 - Manual (SOS) Switch Red Indicator Malfunction
DESCRIPTION
This DTC is stored when the DCM (Telematics Transceiver) detects an open or short in the manual (SOS) switch red indicator circuit of the manual (SOS) switch.
The manual (SOS) switch red indicator illuminates for 2 seconds and goes off when the ignition switch is turned to ON. If a malfunction in the Safety Connect is detected, the manual (SOS) switch red indicator will illuminate.
However, the manual (SOS) switch red indicator may not illuminate when this DTC is stored.
HINT
The manual (SOS) switch red indicator will not operate to indicate another DTC is set, therefore a voice guidance will be heard.
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 Reading and Clearing Diagnostic Trouble Codes.
Result
B -- INSPECT MAP LIGHT ASSEMBLY (MANUAL [SOS] SWITCH RED 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 GROUND LINE - 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 (RED 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 of the battery to terminal U2-19 (IND1) and a negative (-) lead to terminal U2-16 (GND) of the map light assembly connector.
(d) Check if the manual (SOS) switch red indicator comes on.
OK:
Red 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 RED INDICATOR CONDITION)
(a) Confirm the red indicator status after the ignition switch is turned to ON System Description.
Result
B -- REPLACE DCM (TELEMATICS TRANSCEIVER)
A -- Continue to next step.
6. CHECK MAP LIGHT ASSEMBLY (RED 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 U2-19 (IND1) 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.
0 V when the ignition switch is turned off.
Text in Illustration
NG -- CHECK DCM (TELEMATICS TRANSCEIVER) (RED INDICATOR OUTPUT VOLTAGE)
OK -- REPLACE MAP LIGHT ASSEMBLY Removal
7. CHECK DCM (TELEMATICS TRANSCEIVER) (RED 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 F39-11 (IND1) 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.
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