DTC Troubleshooting: B1170
|DTC B1170:||Gauge Control Module Lost Communication with the VSA Modulator-Control Unit (VSA Message)|
|1.||Clear the DTCs with the HDS.|
|2.||Turn the ignition switch OFF, and then back ON (II).|
|3.||Wait for 6 seconds or more.|
|4.||Check for DTCs with the HDS.|
Is DTC B1170 indicated?
YES - Go to 5.
NO - Intermittent failure. The gauge control module (tach) is OK at this time. Check for loose or poor connections.n
|5.||Check for DTCs with the HDS.|
Are DTCs B1168, B1169, B1178, B1183 and B1187 all indicated at the same time?
YES - Troubleshoot DTC B1178.n
NO - Go to 6.
|6.||Check for VSA DTCs with the HDS.|
Are any DTCs indicated?
YES - Go to the indicated DTC troubleshooting, then recheck.n
NO - Go to 7.
|7.||Turn the ignition switch OFF.|
|8.||Disconnect the gauge control module (tach) 36P connector.|
|9.||Disconnect the VSA modulator-control unit 37P connector.|
|10.||Check for continuity between gauge control module (tach) 36P connector No. 1 and No. 19 and VSA modulator-control unit 37P connector No. 23 and No. 37 terminals individually.|
Are there continuity?
YES - Substitute a known-good VSA modulator-control unit and recheck. If DTC B1170 is still indicated, replace the gauge control module (tach).n
NO - Repair an open in the wire.n